an autodidact meets a dilettante…

‘Rise above yourself and grasp the world’ Archimedes – attribution

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What is inference?

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Don’t believe everything you read

What are you inferring?

So am I to infer from this you’re not interested?

What does inferring actually mean? What is it to ‘infer’? Does it require language? Can the birds and the bees do it? We traditionally associate inference with philosophy, which talks of deductive inference. For example, here’s a quote from Blackwell’s dictionary of cognitive science:

Inferences are made when a person (or machine) goes beyond available evidence to form a conclusion. With a deductive inference, this conclusion always follows the stated premises. In other words, if the premises are true, then the conclusion is valid. Studies of human efficiency in deductive inference involves conditional reasoning problems which follow the “if A, then B” format.

So according to this definition, only people, and machines constructed by people, can do it, deductively or otherwise. However, psychologists have pretty thoroughly demolished this view in recent years. In ‘Understanding Inference’, section 2 of their book The enigma of reason, cognitive psychologists Hugo Mercier and Dan Sperber explore our developing view of the concept.

Inference is largely based on experience. Think of Pavlov and his dogs. In his famous experiment he created an inferential association in the dogs’ minds between a bell and dinner. Hearing the bell thus set off salivation in expectation of food. The bell didn’t cause the salivation (or it wasn’t the ultimate cause), the connection was in the mind of the dog. The hearing of the bell set off a basic thought process which brought on the salivation. The dog inferred from experience, manipulated by the experimenter, that food was coming.

Mercier and Sperber approvingly quote David Hume’s common sense ideas about inference and its widespread application. Inference, he recognised, was a much more basic and universal tool than reason, and it was a necessary part of the toolkit of any sentient being. ‘Animals’, he wrote, ‘are not guided in these inferences by reasoning: Neither are children: Neither are the generality of mankind, in their ordinary actions and conclusions. Neither are philosophers themselves, who, in all the active parts of life, are, in the main, the same with the vulgar…. Nature must have provided some other principle, of more ready, and more general use and application; nor can an operation of such immense consequence in life, as that of inferring effects from causes, be trusted to the uncertain process of reasoning and argumentation’.

This is a lovely example of Humean skepticism, which flies in the face of arid logicalism, and recognises that the largely unconscious process of inference, which we would now recognise as a product of evolution, a basic survival mechanism, is more reliable in everyday life than the most brilliantly constructed logical systems.

The point is that we make inferences more or less constantly, and mostly unconsciously. The split-second decisions made in sport, for example, are all made, if not unconsciously, then with an automaticity not attributable to reason. And most of our life is lived with a similar lack of deep reflection, from inference to inference, like every other animal. Inference, then, to quote Mercier and Sperber’s gloss on Hume, is simply ‘the extraction of new information from information already available, whatever the process’. It’s what helps us slip the defender and score a goal in soccer, or prompts us to check the batteries when the remote stops working, or moves us to look forward to break-time when we smell coffee. It’s also what wags your dog’s tail when she hears familiar footsteps approaching the house.

There’s a lot more to be said, of course…

Written by stewart henderson

December 3, 2019 at 9:53 pm

kin selection – some fascinating stuff

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meerkats get together for ye olde family snap

Canto: So we’ve done four blogs on Palestine and we’ve barely scratched the surface, but we’re having trouble going forward with that project because, frankly, it’s so depressing and anger-inducing that it’s affecting our well-being.

Jacinta: Yes, an undoubtedly selfish excuse, but we do plan to go on with that project – we’re definitely not abandoning it, and meanwhile we should recommend such books as Tears for Tarshiha by the Palestinian peace activist Olfat Mahmoud, and Goliath by the Jewish American journalist Max Blumenthal, which highlight the sufferings of Palestinian people in diaspora, and the major stresses of trying to exist under zionist monoculturalism. But for now, something completely different, we’re going to delve into the fascinating facts around kin selection, with thanks to Robert Sapolski’s landmark book Behave. 

Canto: The term ‘kin selection’ was first used by John Maynard Smith in the early sixties but it was first mooted by Darwin (who got it right about honey bees), and its mathematics were worked out back in the 1930s. 

Jacinta: What’s immediately interesting to me is that we humans tend to think we alone know who our kin are, especially our extended or most distant kin, because only we know about aunties, uncles and second and third cousins. We have language and writing and record-keeping, so we can keep track of those things as no other creatures can. But it’s our genes that are the key to kin selection, not our brains.

Canto: Yes, and let’s start with distinguishing between kin selection and group selection, which Sapolsky deals with well. Group selection, popularised in the sixties by the evolutionary biologist V C Wynne-Edwards and by the US TV program Wild Kingdom, which I remember well, was the view that individuals behaved, sometimes or often, for the good of the species rather than for themselves as individuals of that species. However, every case that seemed to illustrate group selection behaviour could easily be interpreted otherwise. Take the case of ‘eusocial’ insects such as ants and bees, where most individuals don’t reproduce. This was seen as a prime case of group selection, where individuals sacrifice themselves for the sake of the highly reproductive queen. However, as evolutionary biologists George Williams and W D Hamilton later showed, eusocial insects have a unique genetic system in which they are all more or less equally ‘kin’, so it’s really another form of kin selection. This eusociality exists in some mammals too, such as mole rats. 

Jacinta: The famous primatologist Sarah Hrdy dealt something of a death-blow to group selection in the seventies by observing that male langur monkeys in India commit infanticide with some regularity, and, more importantly, she worked out why. Langurs live in groups with one resident male to a bunch of females, with whom he makes babies. Meanwhile the other males tend to hang around in groups brooding instead of breeding, and infighting. Eventually, one of this male gang feels powerful enough to challenge the resident male. If he wins, he takes over the female group, and their babies. He knows they’re not his, and his time is short before he gets booted out by the next tough guy. Further, the females aren’t ovulating because they’re nursing their kids. The whole aim is to pass on his genes (this is individual rather than kin selection), so his best course of action is to kill the babs, get the females ovulating as quickly as possible, and impregnate them himself. 

Canto: Yes, but it gets more complicated, because the females have just as much interest in passing on their genes as the male, and a bird in the hand is worth two in the bush…

Jacinta: Let me see, a babe in your arms is worth a thousand erections?

Canto: More or less precisely. So they fight the male to protect their infants, and can even go into ‘fake’ estrus, and mate with the male, fooling the dumb cluck into thinking he’s a daddy. 

Jacinta: And since Hrdy’s work, infanticide of this kind has been documented in well over 100 species, even though it can sometimes threaten the species’ survival, as in the case of mountain gorillas. So much for group selection.

Canto: So now to kin selection. Here are some facts. If you have an identical twin your genome is identical with hers. If you have a full sibling you’re sharing 50% and with a half-sibling 25%. As you can see, the mathematics of genes and relatedness can be widened out to great degrees of complexity. And since this is all about passing on all, or most, or some of your genes, it means that ‘in countless species, whom you co-operate with, compete with, or mate with depends on their degree of relatedness to you’, to quote Sapolsky. 

Jacinta: Yes, so here’s a term to introduce and then fairly promptly forget about: allomothering. This is when a mother of a newborn enlists the assistance of another female in the process of child-rearing. It’s a commonplace among primate species, but also occurs in many bird species. The mother herself benefits from an occasional rest, and the allomother, more often than not a younger relation such as the mother’s kid sister, gets to practice mothering. 

Canto: So this is part of what is called ‘inclusive fitness’, where, in this case, the kid gets all-day mothering (if of varying quality) the kid sister gets to learn about mothering, thereby increasing her fitness when the time comes, and the mother gets a rest to recharge her batteries for future mothering. It’s hopefully win-win-win. 

Jacinta: Yes, there are negatives and positives to altruistic behaviour, but according to Hamilton’s Rule, r.B > C, kin selection favours altruism when the reproductive success of relatives is greater than the cost to the altruistic individual. 

Canto: To explain that rule, r equals degree of relatedness between the altruist and the beneficiary (aka coefficient of relatedness), B is the benefit (measured in offspring) to the recipient, and C is the cost to the altruist. What interests me most, though, about this kin stuff, is how other, dumb primates know who is their kin. Sapolsky describes experiments with wild vervet monkeys by Dorothy Cheney and Robert Seyfarth which show that if monkey A behaves badly to monkey B, this will adversely affect B’s behaviour towards A’s relatives, as well as B’s relatives’ behaviour to A, as well as B’s relatives’ behaviour to A’s relatives. How do they all know who those relatives are? Good question. The same researchers proved this recognition by playing a recording of a juvenile distress call to a group of monkeys hanging around. The female monkeys all looked at the mother of the owner of that distress call to see what she would do. And there were other experiments of the sort. 

Jacinta: And even when we can’t prove knowledge of kin relations (kin recognition) among the studied animals, we find their actual behaviour tends always to conform to Hamilton’s Rule. Or almost always… In any case there are probably other cues, including odours, which may be unconsciously sensed, which might aid in inclusive fitness and also avoiding inbreeding. 

Canto: Yes and It’s interesting how this closeness, this familiarity, breeds contempt in some ways. Among humans too. Well, maybe not contempt but we tend not to be sexually attracted to those we grow up with and, for example, take baths with as kids, whether or not they’re related to us. But I suppose that has nothing to do with kin selection. And yet…

Jacinta: And yet it’s more often than not siblings or kin that we have baths with. As kids. But getting back to odours, we have more detail about that, as described in Sapolski. Place a mouse in an enclosed space, then introduce two other mice, one unrelated to her, another a full sister from another litter, never encountered before. The mouse will hang out with the sister. This is called innate recognition, and it’s due to olfactory signatures. Pheromones. From proteins which come from genes in the major histocompatibility complex (MHC). 

Canto: Histowhat?

Jacinta: Okay, you know histology is the study of bodily tissues, so think of the compatibility or otherwise of tissues that come into contact. Immunology.  Recognising friend or foe, at the cellular, subcellular level. The MHC, this cluster of genes, kicks off the production of proteins which produce pheromones with a unique odour, and because your relatives have similar MHC genes, they’re treated as friends because they have a similar olfactory signature. Which doesn’t mean the other mouse in the enclosure is treated as a foe. It’s a mouse, after all. But other animals have their own olfactory signatures, and that’s another story. 

Canto: And there are other forms of kin recognition. Get this – birds recognise their parents from the songs sung to them before they were hatched. Birds have distinctive songs, passed down from father to son, since its mostly the males that do the singing. And as you get to more complex species, such as primates – though maybe they’re not all as complex as some bird species – there might even be a bit of reasoning involved, or at least consciousness of what’s going on. 

Jacinta: So that’s kin selection, but can’t we superior humans rise above that sort of thing? Australians marry Japanese, or have close friendships with Nigerians, at least sometimes. 

Canto: Sometimes, and this is the point. Kinship selection is an important factor in shaping behaviour and relations, but it’s one of a multiple of factors, and they all have differential influences in different individuals. It’s just that such influences may go below the level of awareness, and being aware of the factors shaping our behaviour is always the key, if we want to understand ourselves and everyone else, human or non-human.

Jacinta: Good to stop there. As we’ve said, much of our understanding has come from reading Sapolsky’s Behave, because we’re old-fashioned types who still read books, but I’ve just discovered that there’s a whole series of lectures by Sapolsky, about 25, on human behaviour, which employs the same structure as the book (which is clearly based on the lectures), and is available on youtube here. So all that’s highly recommended, and we’ll be watching them.

References

R Sapolski, Behave: the biology of humans at our best and worst. Bodley Head, 2017

https://www.britannica.com/science/animal-behavior/Function#ref1043131

https://en.wikipedia.org/wiki/Kin_selection

https://en.wikipedia.org/wiki/Eusociality

 

 

 

 

 

adventures in second language acquisition – my first gleanings

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maybe...

maybe…

Some 35 years ago a new science was born. Now called cognitive science, it combines tools from psychology, computer science, linguistics, philosophy, and neurobiology to explain the workings of human intelligence. The science of language, in particular, has seen spectacular advances in the years since.

Steven Pinker, The Language Instinct 1994.

The above words, from over 20 years ago, now seem a little overblown. My experience as a general absorber of sciency stuff suggests that it’s still a bit premature to speak of a science of language, but of course we know more about it than ever before. My hope is to bring whatever knowledge I can glean from some of the fields mentioned above to my understanding of language in general, and second language acquisition in particular, with a view to helping others to acquire the English language, which is my job.

My method is to start in medias res, as an innocent little fish dropped into the vast ocean of knowledge about the subject that I hope and expect to find online and elsewhere.

My first encounter as I bob about in this ocean, is this video, which introduces me to what the speaker calls ‘the zone of proximal development’, and the ‘five stages of second language acquisition’. On a slide, the zone of proximal development (ZPD, in case I need to refer to it again) is defined as ‘the difference between what a student can do without help and what a student can do with help’. The speaker, Jane Hill, a Managing Consultant for English Language Learner Effectiveness, starts by telling SLA educators that they would benefit their students by teaching not only content but ‘the academic language of the content’, and presumably this ZPD is part of that academic language, as will be the five stages, not yet enunciated.

I have to say that in my fifteen years or so of teaching ESOL I’ve never mentioned the ZPD, nor any 5 stages, to learners. I do have a vague memory of coming across this ZPD concept years ago, but it obviously didn’t stick particularly well. Not surprisingly, if the definition given above is a generally accepted one, for it makes little sense to me – but I won’t dwell on that for now, except to say that I might look up this ZPG notion elsewhere to see if a better definition or elaboration of it can be found. Hill herself does elaborate further, by saying that we should know ‘where students are, and where they’re capable of working to with the help of a knowledgeable other’, and I find this more comprehensible but still problematic. We try to find out where learners are by listening to and reading (and assessing) their productions, and testing their reception of our productions and the productions of others (e.g. English texts). This isn’t always an easy process as their production and reception can vary from day to day and between tasks. And surely it’s even harder to find out ‘where they’re capable of working to’. This is partly because learners are in our class for only a matter of weeks and it’s hard to measure or even to discern progress. The better students seem uniformly and constantly to be at a higher level than the strugglers who seem constantly and uniformly struggling. Test scores aren’t a straightforward indication of progress as each test is different and some, such as essay tests, have a strong element of subjectivity in assessment. SLA, for most adult learners, is a long, slow and partial process, it seems to me.

So, with these doubts and uncertainties in mind I’ll continue with Hill’s slightly annoying presentation of the five stages of SLA. Annoying because of the condescending infant-teacherly tone and because she’s clearly presenting them as facts to be poured into us rather than as someone’s theory. Anyway, she begins with what she describes as a modelling of good teaching. She introduces the five stages of SLA (concepts which we as learners aren’t aware of) by connecting them to the five stages of first language acquisition, concepts which we are apparently familiar with (though I for one have never heard of this breakdown of my language acquisition into five stages – but I’m keen to learn!).

Hill starts by gushingly asking us to remember how our kids acquire their first language. I’ve never had kids, but I’ve certainly observed them, and with great interest, so I can cheerfully concur with her slide-supported enumeration:

  1. preproduction –  about 9 months (no verbalisation, minimal comprehension, some yes & no head movements, some pointing and gesturing)
  2. early production – about 12-14 months (limited comprehension, one- or two-word responses, use of keywords & familiar phrases, present tense only)
  3. speech emergence – age?? (good comprehension, simple sentence production, grammar and pronunciation errors, misunderstands jokes)
  4. intermediate fluency – age? (excellent comprehension, few grammatical errors)
  5. advanced fluency – (near-native usage)

However, no linguistic prizes for guessing this is just a handful of post stages picked out in the continuous process from no language to full language production, with 5 being a more or less arbitrary number. The ZPG seems too vague a concept to be of much practical use, and in all my years of teaching I’ve never heard a colleague fretting over how to get a learner over the early production stage into speech emergence, say. Another problem is that this admittedly bare-bones presentation says nothing about the difference between SLA and learning the L1, except to say that the stages are similar, but not exactly the same. But it seems to me the differences are very significant.

The difficulty I’m becoming aware of here is a very scary one. I don’t think I’ll be able to make much headway in understanding SLA without understanding language itself and how we acquire it. And I suspect that nobody fully understands that.

Pinker has argued that language is an instinct, something innate, which we don’t learn, or not in any straightforward way, from our parents, or by mimesis. Yet it’s surely clear that without an environment of language speakers we’d get nowhere. A child brought up by wolves, if there ever was one, would not be able to speak a language, because she hasn’t had the opportunity  to learn one, and I’ve heard that children deprived of that opportunity during a certain crucial period in childhood are unlikely to become effective language users thereafter. The near-miraculous thing is that children become sophisticated language users very quickly, and I’m interested in the neurological processes involved, as well as whether our understanding of those neurological processes can help with developing effective SLA.

So language is certainly something learned, but there’s something about us that makes us primed, so to speak, to pick up one of the 7000 or so fully grammarised (if there’s such a word) languages. We also learn to walk, but I wonder how we’d go if we weren’t surrounded from earliest childhood by fully adept walkers whose ambulatory achievements and successes we’re naturally keen to emulate. And in a way, I’m answering my own query – we learn language because we hear it all around us, and we want to share in that human experience, to be like them, because we see clearly, though in a sense unconsciously, the obvious advantages of that communication system. It gets us somewhere in the human world.

I’m also interested in this whole concept of grammar. I’ve read, though without quite grasping it, that children can create grammar out of non-grammatical (or perhaps partially grammatical) pidgin, a collection of keywords cobbled together in the intersection of two languages for the purpose of needful communication. ‘Research’ has found that the children of pidgin users are able to create from these fragments a full-blown grammatical creole, as if by magic. This has been cited by Pinker and others as evidence for an innate faculty. I need, obviously, to learn more about such research and the various interpretations of it.

I don’t want to forget embodiment either. I’ve been very encouraged in my practice lately, teaching EGP, the lowest level of academic English (actually pre-pre-academic English),  by responses to certain simple tasks. I’ve asked learners to come out the front and act out simple sentences, with gestures and facial expressions. These are students who generally have difficulty in forming complete grammatical sentences. So they come out and try saying, for example, ‘Hello class, I want to tell you about a really funny movie I saw on the weekend’, accompanied by laughter, hand-on-chest gestures and what-not. Humour, sadness, fear, anger and so on can all be acted out to the accompaniment of a simple sentence, and what I’ve found is that, after a few practice runs, they become more articulate and confident when they express themselves this way. The words come out with less effort, it seems, when they’re concentrating on the emotion, and I get the impression that they’ve taken some sort of ownership of some English speech acts. I’d be interested to find if there is any work being done to confirm these impressions I have of embodied SLA. It’s not much, perhaps, in the mountainous task of facilitating SLA, but it’s something positive.

Written by stewart henderson

January 26, 2017 at 8:23 am

CARE and women’s empowerment

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We have an abundance of rape and violence against women in this country and on this Earth, though it’s almost never treated as a civil rights or human rights issue, or a crisis, or even a pattern. Violence doesn’t have a race, a class, a religion or a nationality, but it does have a gender.

Rebecca Solnit, author and historian

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Canto: So the CARE organisation, an NGO with a long history, is perhaps best known to us here due to our former PM Malcolm Fraser becoming the founder of CARE Australia in 1987, and the president of CARE international from 1990 to 1995. It’s one of the oldest humanitarian aid organisations, with its origins in the forties, in that post-war period when international co-operation and healing became something of an obsession. But did you know that in recent times it has directed its focus on the empowerment of women in disadvantaged circumstances?

Jacinta: Yes, this is something we’ve been discovering only recently, and if you go to the CARE website right now you’ll find the leading article there is about women fleeing Syria, often with children, and about the increasing number of female-headed families among Syrian refugees in Jordan and elsewhere.

Canto: Well, that’s illustrative, and as you know I’ve just read Melvin Konner’s book, Women after all: sex, evolution and the end of male supremacy, and it has a few pages on CARE and how it has kind of renewed itself in recent times by focusing on female disadvantage, and I think that’s a damn good idea.

Jacinta: Yes, not exclusively of course, but it has been focusing on education and empowerment – those things go naturally together of course – which is more of an issue for women in countries like India and many African countries.

Canto: Oh yeah in many countries, wherever you have extreme male dominance you have women reduced to drudgery, virtual slavery, if not actual slavery, women forced into marriage at an early age, an acceptance of rape within marriage, and of course women and girls deprived of whatever paltry education they have in these benighted regions. And these are the most violent and backward regions in the world, but I suppose we’ve harped on that enough already.

Jacinta: So what specifically is CARE doing for women?

Canto: Well its rebranding, as Konner describes it, began nearly a decade ago with a campaign called ‘I am Powerful’ developed by Helene Gayle, then CEO of CARE USA. It was all about knowledge being power and education being key, and this was focused on in a lot of problem regions, in India, Bangladesh, Yemen…

Jacinta: I read that, in India, of the children not attending school, 80% are female. One of the worst records anywhere, but of course, the percentage of girls not being educated is always higher than boys wherever you look.

Canto: Even in Australia?

Jacinta: Well, I’m guessing, but we’ve not quite reached gender equality, and then there are migrants coming from heavily patriarchal societies…

Canto: Anyway the research they did showed the knock-on effects of education for women and girls. Educated girls postpone motherhood, have fewer kids, healthier kids, better educated kids, and this transfers to the next generation and the next in a multiplier effect.

Jacinta: And educated women earn more, suffer less abuse, are healthier…

Canto: So they’ve done great work in developing schools in Benin and Sudan and other trouble spots, places where educated women were a novelty. But it’s not just education, they’ve been providing safe havens for women against male violence within refugee camps in Kenya and Sri Lanka where they had such brutal suppression of the Tamils. And they’ve been involved in microfinancing, along with other NGOs and banks. Because over the decades they’ve found that loans to women are more effective than loans to men.

Jacinta: Hmmm, I wonder why that would be.

Canto: Well, some have disputed it, but it might be that because women are generally more collaborative and group-oriented, social pressure between women ensures that they put the loans to better use, repay them more promptly and so on. CARE is also combining microloans with training in health, governance, human rights and such. This raises consciousness on the importance of education and health, and this is indicated in increased household expenditure in these areas. It’s been noted that microfinance-only programs tend to be more abused, often because the women get leaned on by male relatives.

Jacinta: Okay, so I think you’re right, we need to get rid of men. Gene editing, with this new CRISPR Cas-9 technology and further developments, should make it all straightforwardly possible soon enough. In time we’ll be able to edit the genes of embryos to make them all female. Or maybe we’ll keep about 10% of them as males for reproductive purposes, and as fun toys and slaves around the house. Forget the bloody moslem brotherhood, I’m only interested in the moslem sisterhood, and forget mateship, which emerged supposedly out of the ‘Great’ bloody War, and fuck ‘we band of brothers’, which came from Shakespeare’s bloody Henry V, the battle of bloody AgitpropCourt, with Harry’s band of bros splattering the Frenchy band of bros for larks and sparks. Yep it’s time.

Canto: Well thanks for that. We’ll talk again, women willing.

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Written by stewart henderson

September 25, 2016 at 9:42 am

bonobos and us – lessons to be learnt

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image

Let’s be sexy about this

Bonobos separated from chimps maybe less than a million years ago, according to some pundits. We haven’t yet been able to determine a more precise date for the split. So which species has changed more? Have chimps become more aggressive or have bonobos become more caring? Is there any way of finding out?
It’s not just about genes its about their expression. It will take some time to work all that out. Brain studies too will help, as we move towards scanning and exploring brains more effectively and less invasively.
But surely we seek not just to understand the bonobo world but to change our own. Who wouldn’t want a world that was less violent, less exclusionary in terms of sex, more caring and sharing, without any loss of the dynamism and questing that has taken us to to the very brink of iphone7?
That last remark will date very quickly… Nah, I’ll leave it in.
So we can learn lessons, and of course we’re already on that path. Advanced societies, if that’s not too presumptuous a term, are less patriarchal than they’ve ever been, without losing any of their dynamism. On the contrary, it can easily be seen that the most male-supremacist societies in the world are also the most violent, the most repressive and the most backward. Some of those societies, as we know, have their backwardness masked by the fact that they have a commodity, oil, that the world is still addicted to, which has made the society so rich that their citizens don’t even have to pay tax. The rest of the world is supporting tyrannical regimes, which won’t change as long as they feel well-fed and secure. Not that I’d wish starvation and insecurity on anyone, but as Roland Barthes once said at one of his packed lectures, the people standing at the back who can’t hear properly and have sore feet must be wondering why they’re here.
Maybe a bit of discomfort, in the form of completely shifting away from fossil fuels for our energy needs haha, might bring certain Middle Eastern countries to a more serious questioning of their patriarchal delusions? Without their currently-valuable resource, they might wake to the fact that they need to become smarter. The women in those countries, so effective on occasion in forming coalitions to defend their inferior place in society, might be encouraged to use their collective power in more diverse ways. That could be how things socially evolve there.
Meanwhile in the west, the lesson of the bonobos would seem to be coalitions and sex. We’ve certainly arrived at an era where sexual dimorphism is irrelevant, except where women are isolated, for example in domestic situations. The same isolation also poses a threat to children. The bonobo example of coalitions and togetherness and sharing of responsibilities, and sexual favours (something we’re a long way from emulating, with our jealousies and petty rivalries) should be the way forward for us. Hopefully the future will see a further erosion of the nuclear family and a greater diversity of child-rearing environments, where single-parent families are far less isolated than they are today, and males want to help and support and teach children because they are children, not because they are their children…

Written by stewart henderson

September 10, 2016 at 6:54 pm

group think revisited, or how to improve your mind

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Confirmation bias (and the benefits of social reasoning) in a nutshell:

How can you say to your brother, ‘Brother, let me take the speck out of your eye,’ when you yourself fail to see the plank in your own eye? Luke 6: 42 New International Version

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The argumentative theory of reason

The recent New Scientist collection, Being Human, includes an essay, ‘The argumentative ape’, by Dan Jones, which is worth reading and contemplating for any teacher involved in encouraging her students to think richly about current ethical or political issues. In my college, NESB students study ‘English for academic purposes’, which involves a lot of basic grammar and vocabulary at the lower levels, and academic presentations and essays at the higher levels. In these ‘discussion’ or ‘argument’ essays and presentations, students are required to examine the pros and cons of some chosen activity or decision, such as the proper driving age, the consumption of GM food, or even whether humanity has benefitted or blighted our planet.

However, there seems to be a contradiction in asking students to write, and be examined on, individually written ‘discussion essays’, when discussions and arguments are group rather than individual activities. More importantly, if we want to improve our students’ understanding of current issues, perhaps we should be placing more emphasis on group discussion than on individual analysis.

This is hardly a new idea. The ancient Athenians, founders of democracy – decision-making by the people – built their city around the agora, a gathering place for public talk and argument. This design was quite deliberate, as all Athenian citizens were required to contribute to discussions from which civic decisions were made.

‘The argumentative ape’, however, provides contemporary evidence about the evolutionary importance of argument in human society. It describes a thesis put forward by European researchers Hugo Mercier and Dan Sperber, that human reason evolved not so much to assist us in more clearly understanding our world, but to argue, to persuade, to convince others of our position, our right-ness. So, it evolved socially. And there appears to be some evidence for the more general ‘social brain’ hypothesis, in that a clear correlation has been found between the number of individuals in a primate group and the average brain size of that particular species.

Now one essential problem here should be obvious, as it was to Socrates in his battle with the sophists. The most persuasive arguments aren’t necessarily the best. So it’s natural that along with persuasiveness, skepticism would have developed, as humans sought to evaluate competing arguments.

Through scepticism we’ve identified many types of fallacious reasoning, and ways we have of convincing ourselves in the process of trying to convince others. Confirmation bias, or motivated reasoning, probably tops this list, as it is extremely pervasive if not universal. As Mercier points out, using confirmation bias seems counter-productive if you wish to arrive at correct results, for example in scientific research, but it can be highly effective in argument, as your bias commits you to garnering a multitude of arguments for your position while ignoring, and thus rendering insignificant, all arguments against. If we accept an argumentative theory of the evolution of reason, then, we will see confirmation bias not as a flaw, but as a device to strengthen our own arguments, and the ability to detect such biases would in turn be a device to undo or diminish the arguments of others.

how individual reasoning is affected by the larger group

Experimental psychologists have found many ways in which our reasoning can be affected or manipulated. Take, for example, the framing effect. It has been found, and regularly confirmed, that how the same problem is worded will affect our decision. Jones presents the scenario, used by psychologists, of a small village of 600 people threatened by a deadly disease. In scenario one, if Plan A is adopted, exactly 200 people will survive. If plan B is adopted, there will be a 1 in 3 chance that all will survive, and a 2 in 3 chance that none will survive. When this scenario is presented to subjects, the majority invariably choose Plan A. However when, in scenario two, Plan A is framed with the slight difference that exactly 400 people will die (with no change to Plan B), this is enough for the majority to flip over to Plan B. This consistent result has been explained in terms of ‘loss aversion’ – we prefer to avoid the explicit loss of life as expressed in the change to Plan A in scenario two. Significantly though for the argumentative ape hypothesis, this loss aversion bias is strengthened when we have to justify our decision to a larger group. We have a ready-made justification as expressed in the framing. It’s probable that we always have in mind what the larger group, or ‘society’ will think of our decision, but when this need to justify ourselves is made explicit, the ready rationalisation is more likely to be adopted.

Other effects of apparently faulty reasoning, such as the attraction effect and the sunk-cost fallacy, have been detected in psychological studies, and all have been shown to be enhanced when there is an explicit need for justification. The ‘argumentative’ thesis claims that we tend to choose the most easily justified option rather than what might be best.

Confirmation bias for me, scepticism towards you, and how it pans out

While this may seem a pessimistic outlook on our use of reason, the counterbalance lies in our ability, from clear evolutionary need, to identify and so counter the faulty arguments of others. This pattern follows a familiar evolutionary trajectory, in which a predator evolves a means to capture its prey, leading the prey to develop a defence mechanism to protect itself against the predator. Scepticism helps us to avoid being sucked in and ‘devoured’.

The result for group reasoning is that bias and the scepticism can balance each other out, leading to a greater recognition of the weaknesses in our own opinions and the strengths in those of others. And experimental evidence backs up this result. To quote from Jones’ article:

In one convincing study, psychologists David Moshman and Molly Geil at the University of Nebraska-Lincoln looked at performance in the Wason selection test – a simple card game based on logical deduction. When thinking about this task on their own, less than 10 per cent of people got the right answer. When groups of 5 or 6 people tackled it, however, 75 per cent of the groups eventually succeeded. Crucially for the argumentative theory, this was not simply down to smart people imposing the correct answer on the rest of the group: even groups whose members had all previously failed the test were able to come to the correct solution by formulating ideas and revising them in light of criticism (Thinking and Reasoning, vol 4, p 231).

He also points to research indicating that groups are more creative in their thinking than individuals (see sources below).

Implications for teaching, or how to best facilitate the best group thinking

Evidence from a series of studies by Anita Williams Woolley of Carnegie Mellon University in Pennsylvania suggests that a group’s individual skills are not the best predictor of the group’s overall performance in problem-solving. These studies were designed to measure the ‘collective intelligence’ of the group, in something like the manner of IQ tests for individuals. She found that those groups who scored highest were the most inclusive, allowing maximal participation within the group. Sensitivity to the moods and feelings of others helped groups to score highly, and the best groups were those with the greater number of female members, presumably because females have a greater social sensitivity.

Group thinking can, of course, backfire. Groupthink in fact has long been seen negatively, but this is because people with the same cognitive biases often congregate together, as with political parties and religious organisations, or gravitate towards similar professions, such as the police or the military. In such groupings it’s often the case that the group moves collectively to quite extreme positions. Where group thinking would be expected to work most effectively is precisely in a college for NESB students from different cultures and backgrounds, in which individuals are challenged by widely different but (hopefully!) cogent opinions.

As educators, we need to consider the best outcomes for our students. Clearly there is pressure, in an individualised results-based system, to push for individual skill in argumentation, with the resultant high test scores. However, the evidence for group interaction in improving students’ understanding of the many issues focused on in essays and seminars at the higher levels is clear. Of course the situation is complicated by the fact that many students at EAP2 and EAP3 levels still don’t have the  grammatical and lexical skills to present cogent arguments in English, so that it’s often hard to determine whether their difficulties are those of reasoning or of language. Even so, I believe it is vital to take advantage of the cultural diversity of students’ experience and knowledge (even within identical language groups) to encourage interaction that will challenge biases and create awareness of a variety of perspectives. Hopefully this will enliven their thinking both within the college and in their studies beyond Eynesbury.

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Some sources are found in the links. Here are others.

D Sperber and H Mercier,”Why do humans reason? Arguments for an argumentative theory”, Behavioural and brain sciences: Published online March 2011. http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1698090

http://edge.org/conversation/hugo_mercier-the-argumentative-theory. Mercer elaborates on the theory very interestingly in a video on this website

Williams Woolley, Anita, ‘Collective intelligence in human groups’, April 2012: Center for Collective Intelligence: http://cci.mit.edu/ci2012/plenaries/speaker%20slides%20ci%202012/Woolleyslidesci2012.pdf

D Moshman & M Geil, 1998 ‘Collaborative reasoning: evidence for collective rationality’. Thinking and reasoning V4 issue 3: http://www.tandfonline.com/doi/abs/10.1080/135467898394148

Written by stewart henderson

November 26, 2015 at 6:57 am

distributed consciousness – another nail in the coffin of human specialness

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for more on this, the whole conference is available online

I wrote a piece here called ‘Animals R Us’ a few years ago because I was annoyed at certain contemptuous remarks directed at animals – a rather large set to be contemptuous of – and also because I’ve always disliked the idea of human specialness so beloved of some of our religious co-habitants. I was also thinking of the remarks of Marilyn Robinson on consciousness, which I critiqued even more years ago. Atheists, she argued (wrongly) don’t take enough account of consciousness (with the inference that if they did, they’d be more accepting of a supernatural being, presumably). So I’m happy to briefly revisit the complexities and the consciousness of non-humans here.

The latest research reveals more and more the distributed nature of consciousness, and some of this research is summarised in ‘Triumph of the zombie killers’, chapter 1 of Michael Brooks’s book At the edge of uncertainty: 11 discoveries taking science by surprise. He brings up philosopher David Chalmers’s 20-year-old claim about the ‘hard problem’ of consciousness, that it doesn’t appear to be reducible to material processes. In fact, Chalmers went further, saying ‘No explanation given wholly in physical terms can ever account for the emergence of conscious experience.’ Well, forever is a long long time and I wonder what Chalmers would have to say now (I’ll have to check out his more recent pronouncements). In 1994 he used a zombie analogy, suggesting that you couldn’t know whether we were surrounded by zombies, or ‘pretend’ humans, since the sense of self-awareness essential to consciousness cannot be identified or described by methodological naturalism. It’s been difficult to provide a coherent theory to account for this subjective feeling, and Daniel Dennett took the view a couple of decades ago that consciousness is essentially an illusion, or rather an evolved way of dealing with the world which captures the elements of reality we need to get by, and then some. That’s why we can so often be fooled by our brains. We have perceptual glitches and blind spots. An obvious example is the human eye, which only focuses sharply on a tiny area, using the fovea centralis, a patch of densely packed photoreceptor cells only a millimetre in diameter. The rest of our visual field is seen in much lower resolution, and without colour. But we’re not aware of this because of the eye’s movements, or saccades, which average 3 per second. The time between one sharp focus and the next is ‘blacked-out’ of consciousness, creating an illusion of seamlessly moving vision. The analogy with film is obvious.

This evolved use of sight to be ‘good enough’ helps explain our ‘change blindness’, which has been highlighted by a number of recent experiments, and which has been exploited for decades by professional magicians. It also helps explain why we don’t notice mistakes in editorial continuity in films, which are even overlooked by editors, because they involve ‘irrelevant’ background details. This evolved use of eyesight to help us to make enough sense of the world as we need to, as economically as possible, is something shared by many other creatures, as researchers have declared. Consciousness researchers gathered together at Cambridge in July 2012 and issued a ‘declaration on consciousness’, summarising recent findings on consciousness in non-human animals and in infant humans:

Non-human animals have the neuroanatomical, neurochemical, and neurophysiological substrates of conscious states along with the capacity to exhibit intentional behaviours… humans are not unique in possessing the neurological substrates that generate consciousness. Non-human animals, including all mammals and birds, and many other creatures, including octopuses, also possess these neurological substrates

It’s a vitally important point that’s being made here. Even to call consciousness an emergent property is misleading, as it suggests that we’re still hung up on the consciousness label, and on detecting the point at which this phenomenon has ‘emerged’. Previous tests for consciousness are gradually being found wanting, as what they test has little to do with the more expansive understanding of consciousness that our research is contributing to, more and more. What’s more, serious damage to, and indeed the complete loss of, such areas of the human brain as the insular cortex, the anterior cingulate cortex, and the medial prefrontal cortex, all vital to our self-awareness according to previous research, haven’t prevented subjects from articulating clear signs of consciousness and self-reflection. There’s no ‘place’ of consciousness in the human or mammalian brain, and signs of intentionality and individual personality are cropping up in a whole range of species.

Early researchers on chimpanzees and other highly developed animals were often dismissive of claims that they were being cruel, citing ‘anthropomorphism’ as a barrier to scientific progress. We can now see that we don’t have to think of animals as ‘human-like’ to recognise their capacity for suffering and a whole range of other negative and positive experiences and emotions. And we’re only at the beginning of this journey, which, like the journey initiated by Copernicus, Kepler and others, will take us far from the hubristic sense of ourselves as singular and central.

Written by stewart henderson

July 29, 2015 at 10:05 am