2006-10-06 Spike activity

Quick links from the past week in mind and brain news:

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ABC Radio’s All in the Mind tackles the mind-body problem in an engaging debate.

Wired Magazine with an appallingly-titled article on the neuropsychology of pathopaths: ‘Psychos Need a Little Sympathy’.

On the irony! US Government funded study concludes that conservatism can be explained psychologically as a set of neuroses rooted in “fear and aggression, dogmatism and the intolerance of ambiguity”.

The ‘BBC Prison study’, a re-run of Milgram’s Zimbardo’s famous Stanford Prison experiment (doh! thanks Pedro), is written up in The Psychologist: Tyranny revisited.

Developing Intelligence looks at the nature / nurture interaction in language learning theories.

The New York Times has an article on ‘compulsive shopping disorder’.

There is a God: curry may be neuroprotective – reports The Neurophilosopher.

Gallery Space Recall

half_what_logo.jpgI’ve been collaborating with artist Simon Pope over the last few months and have been working on a project that aims to investigate the interaction between memory and location, and how this relationship can become fractured and renewed in psychosis.

The first event, called Gallery Space Recall, happens tomorrow in Chapter Art Gallery in Cardiff and everyone is invited.

Simon is particularly well-known for his use of walking as a visual art practice (and wrote the wonderful guide to exploring London’s psyche London Walking).

One particular form of delusion that occurs after brain injury seems to cause a rift in the normal pattern of understanding location, most likely owing to a disturbance in the brain’s memory structures.

Reduplicative paramnesia is the delusional belief that a place exists in two or more locations simultaneously and has been the inspiration for the project where we will try and get participants to hold contrasting and contradictory memories of a past location in mind, while experiencing movement through a current space.

The project also asks questions about the difference between delusion, psychosis and supposedly ‘normal’ mental states, and how they relate to our own memories of location and place.

By highlighting the universal influence of memory on our experience of the world, the project hopes to better understand the normal function of memory, and emphasises the common experience of the ‘mad’ and the ‘sane’.

Where is the line between delusion and reality when we only have our memories to rely on?

There are more stages of the project planned (and more events), some of which you can read about here, so we’ll keep you updated as the project moves on.

Link to details of ‘Gallery Space Recall’ event.
Link to Walking Here and There.

NewSci on confabulation and memory distortion

newsci_20061007.jpgThere’s an interesting cover story in today’s New Scientist about the neuropsychology of confabulation – the curious condition where patients give completely false narratives of situations that they think they remember.

The condition is usually associated with brain injury, often to the frontal lobes. In contrast to delusions, these false narratives are not usually fixed, so you might get different false memories given in answer to the same question asked several times.

Sadly, the NewSci article is not freely available online, so you’ll need to pick up a copy at your local library or newsagent if you want to read it.

However, the article is largely a summary of William Hirstein’s recent book Brain Fiction that tackles the subject in some depth (although a little haphazardly in places it has to be said – I’m still baffled as to why he specifically singles-out Capgras delusion as a form of confabulation).

There is much excellent reading inside though, and the first chapter of the book (entitled ‘What is confabulation?’) is freely available online if you want to get a better idea about this condition.

Link to details of Brain Fiction with sample chapter.
Link to intro to the NewSci article.

From sci-fi footnote to cutting-edge vision science

hoyle_black_cloud.jpgThere’s a fascinating letter in today’s Nature about how a footnote in one of Fred Hoyle’s science fiction novels inspired a branch of research in vision science on how the brain estimates when moving objects will arrive at a certain point.

The characters in the book discover an ominous black cloud that appears to be heading towards Earth. Will the cloud hit Earth and, if so, when? The first question is solved when the characters examine the relative speed at which the cloud is translating across the night sky to the rate at which it is looming, or seeming to get larger. The second question is tackled with a bit of impromptu algebra in which the time until impact is calculated from the ratio of the current size of the cloud to its rate of change…

David Lee realized in the 1970s that the brain can use the ratio of size to its rate of change, previously identified by Hoyle, to estimate the imminence of arrival. David Regan realized soon afterwards that the brain can use the ratio of lateral speed to looming rate to calculate where an object is travelling….

Since the early work of Lee and Regan, a considerable amount of research in areas including psychophysics, motor action, neurophysiology and computational modelling has followed (see D. Regan and R. Gray Trends in Cognitive Sciences 4, 99–107; 2000). The whole body of work that exists today can be traced back to a casual footnote and a couple of sketches in a science-fiction novel.

Fred Hoyle was a professional astronomer working at Cambridge University so knew plenty about mathematics, but wrote a number of notable science fiction novels during his lifetime.

The full letter is freely available at the following link.

Link to Nature letter ‘Hoyle’s observations were right on the ball’

Stephen Fry’s ‘Secret Life’ bittorrent available

It seems Stephen Fry’s two-part BBC documentary ‘The Secret Life of a Manic Depressive’ on the science, treatment and experience of bipolar disorder is available online as bittorrents (part 1 and part 2).

We reported on the documentary previously on Mind Hacks, and there’s more about bittorrent here if you’ve not heard of it before.

The programme does a fantastic job of breaking down some of the myths and tackling stigma, and contains a remarkable breadth of opinion on all aspects of the condition. Well worth watching.

2006 – Essential sites for students

spiral_bound_notebooks.jpgFollowing on from last year’s successful ‘essential sites’ round up, Mind Hacks presents our 2006 list of essential websites for mind and brain students, just in time for the new academic year.

Whether you’re a future graduate psychologist, a hardened lab-based neuroscientist or are in the midst of studying any of the cognitive sciences, we should have something to help you on your way.

Continue reading “2006 – Essential sites for students”

A drowsy state of consciousness

grassy_dreams.jpgABC Radio’s The Philospher’s Zone has just had a two-part special on the problem of consciousness – with particular reference to sleep.

The first and second parts are both from a talk by Professor Giulio Tononi, a neuroscientist from the University of Wisconsin Madison.

Tononi discusses particular difficulties in looking for the ‘neural correlates of consciousness’ and particularly addresses what sleep tells us about conscious states.

In fact, Tononi heads up the Centre for Sleep and Consciousness that aims to understand “the mechanisms and functions of sleep and the neural substrates of consciousness” and gives a fascinating run-through of some of his most recent thinking on the area.

UPDATE: The first part seems to have disappeared off the website. The second part works just as well on its own, however.

Link to Part 1: ‘Higher levels of consciousness’.
Link to Part 2: ‘How Not To Be Unconscious’.

Feeling the heat: sexual arousal in men and women

sexy_black_girl.jpgNew Scientist reports on research recently presented at the Canadian Sex Research Forum that suggests that men and women take about the same time to reach the maximum level of sexual arousal.

The researchers, led by Tuuli Kukkonen, used a thermal imaging camera to measure increased blood flow in the genitals while participants were watching erotic films.

Although the report doesn’t say, it’s common in these sorts of studies for the male and female participants to be shown different films, as males and females tend to be maximally aroused by different types of erotica.

Both the film shown to males, and the film shown to females, will likely have been rated by members of the same sex for how arousing it is, and the films will have been chosen to match the levels of arousal for men and women.

What the report doesn’t say is that the researchers seemed only to have measured physical arousal.

This is important, as we have known since the eighties that while men typically feel psychologically aroused when they’re physically aroused, women can be physically aroused while not feeling psychologically turned-on in the slightest.

In other words, women can show physical arousal without feeling sexy at all. This rarely happens with men.

In fact, a recent study reported that physical arousal in females seems a relatively automatic response to viewing any sort of sexual activity, gay, straight, male or female, despite the fact that the reported level of psychological arousal varied considerably.

Women in this study even showed some physical sexual arousal when watching a video of mating chimpanzees, despite reporting that they felt less sexy than when watching neutral videos of landscapes and scenery.

Why there is such a marked difference in feeling sexy and being aroused in women is still a mystery, but it is something that needs to be borne in mind when interpreting any study (and particularly, any news story) that talks about ‘sexual arousal’ as a single type of experience.

Unfortunately, Kukkonen and colleagues’ study seems to have been widely and uncritically reported as suggesting that women get ‘hot’ in about the same time as men do, when in fact, the picture is far more complex.

Link to NewSci story ‘Women become sexually aroused as quickly as men’.

Best out of 3: BPS Research Digest special

bunch_balloons.jpgThere’s a new edition of the British Psychological Society’s Research Digest available online, with the usual collection of updates on the world of psychology research, as well as some special articles by guest writers to celebrate three years of the Digest.

Christian has asked a number of online writers to think of a study from the last three years which has inspired them or changed the way they think about psychology.

First up is Dave and Greta Munger from Cognitive Daily who discuss the startling effect of ‘boundary extension’ – “when you see a scene such as a photograph or even a three-dimensional representation with a clear border, then your memory of that scene tends to extend beyond the original boundary: you remember the scene as larger than it actually was, sometimes even just a few seconds after seeing it.”

They’ll also be forthcoming articles to be published shortly by Dryden Badenoch of The Relaxed Therapist, Jeremy Dean of PsyBlog, Will Meek of Staff Psychologist, Chris Chatham of Developing Intelligence and a short article by me covering a wonderful study on dopamine, stress and unusual experiences.

As well as launching the anniversary special series, there’s also the usual selection of research updates.

This fortnight has articles on a study on the psychology of graphical online interaction (conducted by one of the pioneers of the field, Nick Yee), the widely reported induced ‘shadow self’ experiment, the use of complementary medicine, a study of how much money affects your happiness, the effects of musical tuition on brain development and a study on memory decline in old age.

Link to the BPS Research Digest.

Great neuroaesthetics primer

abstract_texture_1.jpgBrain Ethics has a fantastic primer on neuroaesthetics for those wanting a concise introduction to the field that attempts to use neuroscience to understand art and aesthetic behaviour.

This is currently an exciting but fragmented field and Martin Skov gives an excellent account of the current state of understanding, as well as a guide to the best books available if you want to continue investigating yourself.

Neuroaesthetics can be thought of as a part of a more general study of art and aesthetics as a biological phenomenon. I will follow other proponents of this view (such as Tecumseh Fitch) in calling this broader approach bioaesthetics. The overall goal of bioaesthetics is to answer the three basic biological questions – what?, how?, why? – in regard to aesthetic behaviour in humans: what is art and aesthetics?; how does art and aesthetics spring from the brain?; and why did this cognitive ability evolve in humans?

Link to ‘A short bibliographic guide to the emerging field of bioaesthetics’.

Why do people participate in research?

multiple_choice.jpgWe often assume that psychology and neuroscience experiments tell us general things about how humans think and behave, but little attention is given to whether the people who volunteer for research studies are representative of the wider population.

PsyBlog has a concise summary of a recent study that looked at the sort of people who volunteer for research studies and how they differ from the general population.

Narcissists are over-represented amongst non-participators, as are those low on assertiveness. On the other hand, those high on obsessive-compulsive, histrionic, self-sacrificing and intrusive/needy measures are more likely to participate.

What is not clear is how these sort of differences affect different types of studies.

For example, will a study that is investigating memory by significantly affected by the fact that the participants are likely to be less narcissistic than the general population?

Link to PsyBlog post ‘Why do people participate in research?’.

Flying high

brain_hot_air_balloon.jpgOh. My. God. It’s a hot air balloon in the shape of an anatomically accurate brain. For hire.

According to the website, the brain balloon’s mission is to:

To capture the attention of the world and direct it toward understanding the importance of the human brain and the diseases, disorders, and injuries that afflict it.

To teach and encourage all people to seek a high purpose and achieve their potential.

To create a strong symbol of hope and human possibility.

To celebrate intelligence, promote education, and ignite imaginations!

There are stoned neuroscientists behind this, I swear.

Link to Brain Balloon website.

When I grow up…

oko.jpgChild support organisation KidLink has a section that collects children’s desires for future careers. The pages for psychologist and psychiatrist are simultaneously touching, alarming and hilarious.

Anastasiya from Kazakstan: My dream-is to be a dentist or psychologist. Why? Because I want to help people and get a lot of money.

Let’s hope Anastasia isn’t planning on working for the NHS.

Kirsty from Australia: I have no idea what I will be! Either a vet, olympic sprinter or maybe a professional soccer, tennis or volleyball player? Maybe even a actress, cause i did drama. Or a singer. I like singing, I am in the chior and I have done a solo once. Oh, I know, if I don’t get professional for any of those sports I could always be a sports teacher. Or maybe even a psychologist. Or a stand up comedian. I don’t know yet. But I love sport, so i will probably do something sporty. A surfer? I like swimming in the sea, not pools. And I go to the beach a lot.

Kay Redfield Jamison? Is that you?

Chinetta from United States: i want to become a psychiatrist and i want to drive a porsche and i want a big house

Chinetta is obviously one of the America’s few remaining children who have yet to meet a psychiatrist.

Alexandria from United States: When I grow up I would like to become a psychiatrist because I really enjoy helping others. It makes me feel good when I help some one cope with their issues and see them benefit from the advice that I give them. In order to do so I plan on going to college for as long as it takes. I would like to go to Spelman but I am not sure if it is the right school to study for Psychiaty. I am determined to make it though I will go to school for as long as it takes as long as I am able to save at least one person from hurt and sorrow.

Sounds like you’ll make an excellent psychiatrist Alexandria.

Julia from Belarus: At fisrt I want to get higher education.Earlier I wanted to become a barrister but in our country it’s impossible & now I want to become a psychologist.Like every normal man I want that my work will bring me,of course,money & will make me happy.But in general I would like to be a poet — it is my dream & if I have a real chance in order to realize it I will use this chance what’s more I write verses & my friends don’t find them bad.It is all.

Link to KidLink careers: psychologist.
Link to KidLink careers: psychiatrist.

Eternal dreamtime of the spotless mind

let_forever_be_still.jpgSeed Magazine has a video of a fascinating conversation between sleep neuroscientist Robert Stickgold and film director Michel Gondry, director of Eternal Sunshine of the Spotless Mind.

Stickgold has reinvigorated sleep research by investigating the borderlands of consciousness with a series of novel experiments.

I wrote briefly about one of my favourites in Mind Hacks (the book):

An ingenious study published in Science did manage to investigate the role of some of the deeper brain structures in hypnagogia, specifically the medial temporal lobes which are particularly linked to memory function. The researchers asked five patients who had suffered medial temporal lobe damage to play several hours of Tetris. Damage to this area of the brain often causes amnesia, and the patients in this study had little conscious memory for more than a few minutes at a time. On one evening, some hours after their last game, the players were woken up just as they started to doze and were asked for their experiences. Although they had no conscious memory of playing the game, all of the patients mentioned images of falling, rotating Tetris blocks. This has given us some strong evidence that the hypnagogic state may be due (at least in part) to unconscious memories appearing as unusual hypnagogic experiences.

Michel Gondry is best known for being discovered by Bj√∂rk (no, not that one), directing a clutch of essential music videos (including The Chemical Brothers’ startling Let Forever Be), and moving into big cinema.

His biggest cinema success to date is Eternal Sunshine of the Spotless Mind which has become a modern mind-bending classic with its feat firmly in cognitive science.

Gondry’s new movie, The Science of Sleep, also explores the mind’s outer reaches.

The pair discuss how psychology and art have tackled sleep, and how the logic of causation gets warped by both science and dreaming.

Link to Seed Magazine video with Stickgold and Gondry.
Link to fantastic article on the cognitive science of Eternal Sunshine of the Spotless Mind.