Cog Sigh

Cultural Pollution

2009-01-07T22:01:00.000-08:00

Oscar Wilde said something like "England and America are two countries separated by a common language."

We've had a couple of Australians staying with us this week and we've been learning a lot about their strange species of English. As you would expect, we've had more than a few moments of cross-cultural confusion. Like when they ask me when I'm leaving for uni (short for university, which I would just call 'school') or where the toilet is (not in the bathroom, 'toilet' is the bathroom). Also, there was a remark about how Australians can't buy alcohol at grocery stores, they have to go to the bottle-o. Yup, bottle-o..

Now, confusion about where to find a 'toilet' is pretty innocuous, even kind of cute, but, according to our resident Aussies, cross cultural confusion can be dangerous when it comes to knowing how to get help in an emergency. Apparently they have a different emergency code. They don't dial 9-1-1, they dial 0-0-0 ('triple 0'). Sadly, demographic most ignorant of the 'triple 0' convention is not tourists, but Australians who watch American movies. Dialing 9-1-1 instead of 0-0-0 has been such a problem that if you call 9-1-1 in Australia now, you'll get the 0-0-0 emergency response operators. Talk about high-stakes cultural pollution..

What does a dog say?

2008-10-18T08:44:00.000-07:00

I'm sure you all remember when you were little kids and your parents asked you a whole series of questions like "what does a dog say?", "what does a duck say?", etc. Well, Agathe Jacquillat and Tomi Vollauschek, graphic designers who met at the Royal College of Art in London while taking a post-grad course on Communication Art and Design, have taken that childhood game a step farther, possibly in another direction.

Jacquillat and Vollauschek are responsible for the delightfully intriguing and addictive site bzzzpeek , where they have collected voice samples of children from around the world responding to questions like "what does a dog say?". The best thing about this is that their responses are only occasionally "woof woof". Russian dogs say "guff guff", Japanese dogs say "wua wua", and goodness knows what Korean dogs say. Korean onomatopoeia tends to be the strangest for American English listeners.

All this serves to bring home a point that I haven't made yet, one that is often overlooked in Cognitive Science; language is not just for communicating, it's also for perceiving. It's fair to assume that Russian dogs bark like American dogs (they have the same vocal apparatus), so it must not be that American dogs make "woof woof" sounds any more than Russian dogs make "guff guff" sounds. Rather, where American speakers hear "woof woof", Russian speakers hear "guff guff". The language(s) we speak influence what we are able to hear (and communicate). For more on this topic, Sapir-Whorf Hypothesis and Karen Mattock.

I really appreciate this sort of work because it marries principles of good design (simple intuitive complexity) with novel, unpretentious human-sized science.

a closer look

2008-10-08T21:41:00.000-07:00

Eyes are important. Not only are they the primary portal through which we perceive the world (~30% of cortex is involved in vision), the eyes can reveal the interests and intentions of others. It's no mistake that the eye has been referred to as "the window to the soul" since Biblical times.

The other day my professor made the point that eye-contact is not a property of the individual. Eye-contact emerges from interactions between individuals. A little bit of close observation reveals that eye-contact is not just a social phenomenon; it's also a powerful social tool.

Have you ever tried to catch someones eye? Or how about in movies, when lovers/enemies lock eyes before they kiss/fight? Or when a tour guide advises you "not to make eye-contact" with vendors in a foreign country?

When someone is lying they are often shifty-eyed and we look askance at them. According to Dictionary.com, to 'look askance' at someone is to "disapprove", while 'askance' simply means "sideways or obliquely". We show our disapproval by withdrawing access to eye-contact.

Eye-contact in humans is fun, but it has also proved to be an interesting tool for analyzing the interactions of non-human primates. Dr. Christine Johnson (UCSD) has been studying a triad (group of three) of bonobos (monkeys, above.) at the San Diego Zoo. They don't talk and there is no way to 'look inside' of their heads to see what their thinking, but they are obviously social and cognitive. So Dr. Johnson decided to code her data for "brightness", the degree to which each bonobo is facing the others (i.e. access to eye-contact). Her data reveal that access to eye-contact ("brightness") in the group is reliably correlated with patterns in their social interactions.

While I'm not really doing justice to the topic of eye-contact, or even to Dr. Johnsons research, for that matter, I hope you see what I mean.

Define "You"

2008-10-07T19:52:00.000-07:00

I've been working in a lab that is interested in deixis, among other things. Deixis is, essentially, context-dependent linguistic reference. So any word that would be entirely ambiguous out of context, like 'now', 'then', 'this', 'that', 'it', 'there', 'me' and 'you' are all deictics.

These words (or rather, how people use these words) are interesting because

a) the speaker must take a personal perspective to use them (if you are 'there', I must be 'here'), and
b) they are used to talk about people, places, and things (both present and absent, concrete and abstract) in terms of how the speaker conceives of them,
c) they are unintelligible to non-humans (though several animal species, notably chimps, are capable of recognizing themselves, abstract symbolic reference is out of their reach), as illustrated below.

PS - Thanks for the cartoon, Dr. Creel!

What YouTube Means About YOU

2008-09-29T10:21:00.000-07:00

This quarter I am taking my second ethnography class. I'm interested in using ethnographic method for my own research (both now and in the future). According to Wikipedia, ethnography is a

"genre of writing that uses fieldwork to provide a descriptive study of human societies. Ethnography presents the results of a holistic research method founded on the idea that a system's properties cannot necessarily be accurately understood independently of each other."

In practice, ethnography is learning how to look at, talk about and transcribe data (in this case, pictures, audio, and video) in ways that reveal patterns, regularities, causalities, etc. that tell us something about the system.

While ethnography has traditionally been a tool for anthropologists, both anthropology and ethnography are now being used to look at cognition and cognitive systems (yay!).

Here's a really brilliant presentation, given by Michael Wesch to the Library of Congress, showing what ethnography can reveal about the cultural and social properties of YouTube.

"Two by Two" or "Why One is Not Enough"

2008-04-25T13:04:00.000-07:00

A lot of Cog Sci research is focused on figuring out the basic mechanisms of sensation and perception, mostly because we need to understand the basics before we can make real claims about more abstract, interesting, human-type cognitive activities. This is all just to preface the next bit.

As far as I can tell, our bodies know that 'two are better than one', especially when it comes to perceiving and navigating through space. Think about it. At an obvious and general level, we have two feet to walk and two hands to manipulate things. On a more cognitive neuroscience-y level, we have two eyes that see slightly different views of the world (allowing us to perceive depth more easily), and we have two ears that hear two different sound profiles of the world (allowing us to locate the sources of sounds). This all makes sense.

Here's where things get strange. We have a nose. We have two nostrils. Recently, researchers at Berkeley found that this is a big deal (in terms of spatial perception). Despite the fact that humans don't depend on olfaction (smell) in the same way that other mammals do (see dogs, cats, rats, etc), these researchers found that humans are perfectly capable of following a scent trail (see image #1, one the left is a dog following a pheasants scent trail; on the right is one of the subjects in the study).

Not only that, but they used a 'nose prism' (row f in image #2, don't ask) that allowed the researchers to control whether the participants were breathing air from one or two airstreams. Turns out that participants breathing two different airstreams (which means that each nostril got slightly different air/scent inputs) were both faster and more accurate in their scent-tracking than those who only smelt air from a single stream! I think that it is crazy that we (our brains) are capable of detecting differences between our nostrils (that's like 5mm, nothing!).

In a Nutshell

2008-04-23T12:14:00.001-07:00

This is just a little somethin I whipped up for the Cog Sci student conference. It's watered-down acrylic and pen on the back of a Trader Joe's bag.

Boys and Breakfast

2008-04-23T11:37:00.000-07:00

Recently I've been going to the BBC for my news. Today one of the headlines for their "Health" section was "High-calorie diet linked to boys".

According to the article, women who have higher-calorie, nutrient-rich diets around the time of conception and early pregnancy tend (56% of 740 first-time pregnancies studied) to have male children. This trend has been well-documented in other species (horses, cows, etc). There has been a slow, steady decline in the number of boy babies born in developing countries in the few decades.

The idea is that well-nourished mothers are more likely to live in favorable environments, environments that could support a whole bunch of babies. It makes sense, under these conditions, to have boy babies because boys could sire more babies than girls could mother...

The point of all this (for me) is that it is tremendously ironic that the cultural values and habits of the affluent (thin, well-managed women, preferably too busy to eat breakfast) would create conditions of scarcity within the individual (lean times, more girl-children).

Sorry to stray from cog sci, but intriguing things are intriguing things, and both nutrition and gender have interesting and significant effects on cognition, so this might relate to something more relevant later.

Also, for full article, go to http://news.bbc.co.uk/2/hi/health/7358384.stm .

Visualizing the Inside Out

2008-04-02T15:01:00.000-07:00

A design group from Hong Kong has come up with a clean and clever way to help the general public visualize the impact of the(nearly) invisible. These guys printed a poster (with a drawing of our respiratory system) with clear sticky ink. Over time, the image (of our lungs) became visible as airborne pollutants collected on the poster. This is definitely a great example of meaningful yet parsimonious design.

BrainRise

2008-03-20T23:46:00.000-07:00

This is just a little something I painted the other day... maybe (hopefully) this is the dawning of a new age in the land of the brain!

Oddballs and the Unexpected

2008-01-28T10:05:00.000-08:00

There are many ways to see what the brain is doing during a task. One of the most common techniques is called electroencephalography (EEG), which measures the electrical impulses of the brain collected using electrodes on the scalp. Brain researchers have come to recognize that there are certain brainwaves that characterize responses to a specific class of stimuli. The brainwave that I want to talk about is called the N400.

The N400 appears when a person is presented with a semantically unfitting or 'oddball' (yes, that is a scientific term) sentence. For example, "I spread my toast with jam and socks."

Recently, researchers have been arguing about whether or not people integrate context information when processing the meaning of sentences. By arguing, I mean passionately writing papers and designing definitive experiments.

So this Dutch scientist, van Burken, thought "Well, if conext information IS integrated in language processing, the 'oddball' effect (the N400) should happen when a perfectly acceptable sentence is presented in an inappropriate context." So he presented the same sentence ("I would like a glass of wine.") twice; once in an adult voice, and once in a childs voice. Sure enough, viewers showed an N400 response to an entirely acceptable sentence in an inappropriate context!

I love elegantly designed experiments like this one because even though we intuitively understand something (like that context is a factor when we are interpreting meaning), conclusive scientific evidence for it can difficult to come by.

Music Make Me Lose Control

2008-01-19T19:17:00.000-08:00

My father was scanning the headlines and he came across a news article about a woman who had MUSIC-INDUCED epilepsy! They call it musicogenic epilepsy, and according to the hospital that treated her, she is one of 5 such cases in the world today.

Epileptics of this sort experience seizures only while hearing music. For this patient, Stacy Gayle, singing in her church choir and listening to music by Sean Paul sent her into grand mal seizures.

Ms. Gayle found that medication didn't really help with her seizures, so she went to Long Island Jewish Medical Center for treatment. Doctors there determined that her seizures came from a single, abnormal region of her right hemisphere. They recorded the electrical activity of her brain (using EEG) and when they saw that she was going into a seizure, they injected her with a radioactive tracer and performed a PET scan, which revealed that her seizures started in a part of her temporal lobe (the medial temporal lobe). To further pinpoint the abnormal region, they implanted a set of 100 electrodes in the right side of her brain, targeting the medial temporal lobe. Once these electrodes had recorded her seizure doctors were able to remove the exact epicenter of her epilepsy (without giving her any neurological deficits!). She has not had a seizure in the 3.5 months since the operation.

For the full article, visit
http://www.northshorelij.com/body.cfm?id=15&action=detail&ref=996

In the Mood for Memory

2008-01-11T19:59:00.000-08:00

It's January and I just started a new quarter at UCSD, so I'm going to make a fresh attempt to make a habit of posting when I learn something especially interesting. Maybe, if this works, I'll even do a "Coolest Cog Sci Fact of the Week" sort of thing or something.

So, to begin with, I'm taking a class called "Learning, Memory and Attention." In her first lecture Dr. Sarah Creel (my professor) told us the most interesting thing about memory. She was giving us a few scientifically informed study tips, like study a little bit at a time and be sure that you understand the concepts well enough to explain them to your grandmother and caffeine and exercise help consolidate memory, etc., when she mentioned that it is important to study in the same state of mind that you will be in when you take the test. In other words, memory is functionally dependent on your brain state.

Here's her illustration (note: stories and concrete examples are amazing ways to make a concept memorable). A friend of hers, lets call her Carly, was an undergrad at Berkeley taking calculus. Carly was also on crack. When she studied she was on crack, when she went to class she was on crack, when she took tests she was on crack. Carly got an A in calculus. At this point Dr. Creel made sure to disclaim that "This isn't a drug endorsement, and crack doesn't make you smarter." Over the summer Carly got clean and when she came back in the fall she took the next calculus class in the series. Carlys new teacher gave her a test to see how much of the material from the previous class she had retained. She got an F. The sober Carly couldn't remember the things that the drugged Carly had learned. So, Dr. Creel said, the moral of the story is that you should make it easy on yourself by studying AND testing sober.

Great story, but I am much more interested in the implications this has on the nature of my own identity than improving my memory. Think about it. This memory principle applies to our brain states in general (i.e. our overall mood and neurochemical activity) rather than specifically just drug-induced brain states. In practice this means that, for example, when I am depressed I most easily remember episodes and information that I encountered during past periods of depression (by depression I mean a mood, not clinical depression). We've all experienced how our moods seem to feed themselves, but just think about it in terms of identity. Identity is essentially composed from a series of key memories about the experiences that we have had and what we have made them mean about the world. If I am building a definition of myself (to a certain degree) from my own memories, then my understanding of who I am when I am depressed is significantly different from who I think I am when I am happy or calm simply because I am constructing my identity from a different set of memories.

Now, I'm definitely no expert, and I haven't done any experiments to investigate this further (yet), but I have a few theories (or rather, informed intuitions) about the nature of self and identity. There are a ton of real-life illustrations of how a 'person' can behave as though he/she is actually a series of distinctly different people (generally speaking, in terms of personality traits and behavior). Obvious examples are people with Multiple-Personalities Disorder and people who are bipolar, but the same principle can be seen in perfectly functional, well-adjusted, 'normal' people. For example, a woman uses significantly different behaviors and cognitive strategies (she assumes an entirely different role) when she is interacting with her child than she does when she is interacting with her husband. Our culture and our immediate context (our social role and mood)help us filter out memories that aren't appropriate or are inconsistent (in terms of our social context). I definitely need to do a whole lot more thinking (and maybe some research) about this, but if any of you have any thoughts on the subject, please do share them.

Out-of-Body Experiences Aren't as Far Out as You Think.

2007-11-04T16:50:00.000-08:00

Hey All! I've been neglecting my blog for the sake of science, but never fear, I've found loads of really intriguing things to share with you!

Today's tasty tidbit comes to us from radio WNYC's podcast show "Radio Lab", a show that investigates a wide assortment of cutting-edge and curious topics in science. Their podcast is available in iTunes.

During their "Where Am I?" issue on body image, Jad Abumrad and Robert Krulwich explore the relationship between brains and bodies and how they can get way out of synch. Here's just one item from their show.

In the summer of 1952 the pilots-in-training at Luke Airforce Base suffered 9 fatal accidents during routine training exercises. Another pilot from the same training group reported that once, during a training exercise he felt as though he was sitting on the wing of his plane watching someone (actually himself) fly the plane. Eventually he realized that he was watching himself and resumed conscious control of the plane.

They called in Jim Whinnery, Chief Flight Surgeon and Chief Aeromedical Scientist at the Naval Air Warfare Center. He decided to put volunteer pilots in a centrifuge (the whirling mechanisms used to train astronauts) that had been set up to feel and work like a cockpit and see if OOBs can be induced. The body goes through a specific sequence as the centrifuge gains speed: first the blood is pulled from the brain, and you experience 'gray-out' vision, followed by tunnel vision, black-out, and, if you take it far enough, you lose consciousness. When the pilots come to they are very disoriented, they don't know who or where they are or what they're supposed to be doing. Then it all comes back to them in a rush.

Whinnery tested around 500 pilots in 15 years and recorded their experiences. He noted that the average black-out lasted 12-24 seconds. During black-outs pilots experienced strange visions, so of which included OOBs. Whinnery thinks that the visions happen when the brain loses communication with the body. The visions are the brains way of explaining its sensory experience to itself.

Of the 500, 40 had OOBs. Of that 40, a small subgroup had visions of a tunnel with white light. They were the ones with the most intense black-outs.

As far as I'm concerned, this discovery poses way more questions than it answers. Any thoughts?

Brains, Computing and Computers

2007-06-09T20:07:00.000-07:00

This an amazing talk about brains and brain theory from the guy who invented the PalmPilot. Totally worth 20 minutes of your life.

Myspace, Myworld, Myself

2007-06-08T20:49:00.000-07:00

I found a really interesting snippet in the latest issue of The Atlantic about some of the social implications of the Myspace generation. Some psychologists have used a"Narcissistic Personality Inventory" test to measure how 16,475 college kids (starting in 1982 and continuing through 2006) view themselves. The results? "Overall, almost two-thirds of the most recent sample display a higher level of narcissism than the 1982 average." They further noted that students born after the invention/spread of the internet (i.e. the demographic most likely to use sites like Myspace and YouTube) are especially prone to narcissism.

Myspace aside, increasing narcissism is a source of concern because independent studies have showed that "narcissists have trouble forming meaningful relationships, tend to be materialistic, and are prone to higher levels of infidelity, substance abuse, and violence." I find it ironic that the same system that makes it amazingly easy to connect with people may be a reason that young people are becoming more self-involved.

Introductory Neuroanatomy

2007-05-13T20:48:00.000-07:00

Turning Our Words into Actions.

2007-04-22T15:50:00.000-07:00

Linguists have been trying to map language (and all it's cognitive aspects) in the brain. We now know (generally) where speech is produced, where grammar comes into the picture, where written language is decoded, etc.

Recently, linguists have been looking for meaning in the brain. For example, you just heard the word 'cat', but is your concept of 'cat' stored in the same place as your perception of someone saying the word 'cat'? The short answer is 'no'. Most studies of this nature (trying to localize word meaning in the brain) have focused on concrete, visual nouns. In a study by Hauk, Johnsrude, and Pavermuller (2004), the question of word localization is applied to action words with very interesting results.

Their experiment was elegant. They chose three categories of action words, each related to a different region of the body (specifically face/tongue words like "lick", arm words, "throw", and leg words, "kick"). They selected 50 words for each category and then had their subjects read them (silently), all while in an fMRI brain scanning machine. Turns out that the (non-language-specific) areas of the brain that are activated by DOING the physical action (of the word) overlap significantly with the brain areas activated be just READING the word. Let me run that by you again. Reading an action word like "throw" activates the arm-related area of the motor cortex as well as normal language areas.

Now, no experiment should be taken too seriously, but this data implies that the meaning of a word (at least the meaning of an action word) lies somewhere between understanding the word and doing the action.

In My Mind's Ear

2007-04-20T11:23:00.000-07:00

I was talking with a friend today who told me to "listen to something with my mind's eye." This made me wonder whether or not there is such a thing as a 'mind's ear'. Upon further discussion an reflection, we concluded that there must be a 'mind's ear', at least metaphorically, because otherwise it could never get too loud to hear yourself think. Now, I like working out kinks in common metaphors as much as the next person, but this conclusion of ours lead to another, more complicated question: How can there be a listener (the mind's ear) and a speaker (the self) within a single (sane) mind, what areas of the self/cognition are responsible for hearing and speaking, and how is all this synthesized into a cohesive whole? These are essentially questions that lie at the heart of Cognitive Science. Any thoughts on the subject?

Dreaming = Normal?

2007-04-09T16:18:00.000-07:00

Department of Redundancy Department

2007-04-06T08:35:00.000-07:00

Science asks questions. When science gets an answer it's easy, for the media especially, though scientists have been guilty as well, to think that it is the answer. More and more evidence indicates that many biological systems, especially the human nervous system, are naturally and necessarily redundant. We can regulate our body temperature by storing fat or sweating, we can write a letter with a pencil or a computer, etc. Though redundancy seems to be an inefficient use of energy, it makes a system much more stable and durable.

When a person is forming complex words, for example, "walked", there are two language mechanisms available; you can simply memorize the world "walked" as a single unit, or you can consciously construct it from "walk" and "-ed." Recent studies show that rather than using one mechanism all the time, people tend to use a specific mechanism depending on the situation. People tend to memorize high frequency words like "walked" and construct rare words, like "balked." An interesting side note, estrogen is a memory aid, so women use the memorization method for more words (on average) than men.

Many of the new findings in neuroscience may make more sense if we try to see how they might fit in a redundant system, rather than what they do on their own.

This portion of CogSigh brought to you, in part, by Michael Ullman, a Professor of Neuroscience at Georgetown University in his article "More is Sometimes More."

Boss vs. Backseat Driver

2007-03-05T21:17:00.000-08:00

When BMW was first introducing cars with voice-automation into their German market they decided to use a female voice. As these cars made their way onto the streets, German drivers began to complain to BMW they did not want to be given instructions from a woman. Their response was so strong and so negative that BMW did a full product recall and substituted in a male voice. There were no further complaints.

This nugget was mined from the KPBS film "Do You Speak American?"

Ridiculously Interesting Neuromarketing Post Alert!

2007-03-04T13:13:00.000-08:00

I just read a recent post on one of my favorite blogs (see Neuromarketing on the sidebar) about how the order in which information is presented dramatically changes its reception. He mentions a study conducted by Frank Luntz in which focus groups watched three video clips related to Ross Perot (a biography, a third party recommendation and a speech). The groups who saw the speech first, followed by positive background information, responded overwhelmingly more negatively to Perot than the groups who first saw the clips describing his impressive and successful business history. People respond positively when they are given subtle, even subconscious, promptings. Bottom line: read the full post for a more detailed explanation.

The Language and the Land

2007-02-26T19:50:00.000-08:00

A great linguist once said that "a language is a dialect with an army and a navy." The distinction between a language and a dialect (or between different languages) is hard to make independent of politics and a populations' identity. In fact, linguistically, from a structural level, there is no distinction to be made.

The linguistic differences between dialects within the 'Chinese" language are much greater (structurally) than those between the Romance languages (Spanish, French, Italian), however, they aren't recognized independently as different languages. The key to understanding this odd phenomenon is to look at where (linguistically) a people identify themselves. The people of China are united linguistically through a shared script (uniform written word), so the significant structural differences between their dialects aren't as significant. It is very important for the Spanish, French and Italian peoples that their spoken languages be viewed as significantly distinct, in spite of their structural linguistic similarities, because their cultural identity is rooted in their language (among other things).

Language marinates our experience of the world so fully that it is easy to forget that we (social beings that we are) have made it and that it is an organic and dynamic social force, rather than a social tool.

Baby Steps

2007-02-26T19:43:00.000-08:00

These days parents will do anything to give their kids an advantage. Whether it's prenatal Mozart or pre-pre-school, the business of gr owning up and getting out into the "real world" has gotten a lot more involved. News for the homefront: sometimes it's better to just let them go at their own pace. One piece of evidence on this topic comes from a study concluding that children who spend more time crawling (read: take longer to learn how to walk) have better hand-eye coordination AND are much better and deeper readers.

Kids Really Are Monkeys, Just Ask a Linguist

2007-02-15T21:33:00.000-08:00

In my linguistics class we've been learning about hominid (pre-human and human) evolution, specifically the evolution of the vocal apparatus. In our last lecture my professor, Meiko Ueno, brought us back to the present and showed us a slide comparing the vocal apparatus of a chimpanzee, an adult, and a child. Interestingly enough, the child has much more in common with the chimp than the adult.

Now this might not seem right, kids are technically human (homo sapiens) not chimpanzee (homo troglodytes), no matter how much monkeying around you have to put up with, so what gives?

Here's the thing; the (adult) human vocal apparatus is a choking hazard. Yup. You heard me right, from an evolutionary perspective humans would rather risk a gruesome death (choking) than put down their cell phones. Our species has survived long enough to invent and use cell phones because human infants are born with the ability to eat without choking to death. As infants develop more muscle control, their vocal tract shifts into an adult human (talking) configuration (between ages 3 and 4).

If you think about it, evolution can be seen in the life of an individual (from monkey to man in five years) as well as the species.

How to be a Superfan

2007-02-03T08:26:00.000-08:00

If you pay any attention to sports, you will know that the Superbowl is tomorrow. More Americans watch the Superbowl than vote, and there is rarely any doubt about which team to back (unlike elections).

If you're a well-informed fan, according to Psychology Today, you would gather a group of like minded friends and wave pennants (or foam hands or whatever) in sync. A group of amateur psychologists did this as an informal experiment at a series of Dallas Mavericks games. At the games they attended, the Mavericks opponents shot 8% below the league average on free-throws. This may not seem like a tremendously significant effect, but it could make the difference for the home team.

Also of note, the same article points out that "emergency room visits drop during big games and spike after they're over." A new criterion for die-hard sports fans: if your own personal risk of injury is at least as great as a professional athlete in a contact sport.

Conmen and Conversation

2007-01-31T17:18:00.000-08:00

At one time or other we've all been cornered by a conman. Some friendly stranger on the street strikes up a conversation at the stoplight and next thing you know he's asking for $50 to help an impoverished architect and his family flee from some underdeveloped African nation. You and I both know that there is no real African family in the picture, but it is still hard for us to get away.

How can a stranger engage our time and sympathies so quickly? It all starts with a simple question. According to the 'rules' of conversation that we all follow, when someone asks a question like "Do you have the time?" or "Do you speak English?" and we respond appropriately, we have just committed to a conversation (however brief). At this point, once he's engaged our time and attention, a conman can begin to engage our sympathies.

Similar implicit conversational rules apply to telephone calls, as the simple act of answering the phone commits the receiver to some sort of conversation with the caller. Intriguingly enough, the general conversational 'rule' for telephone conversations is that the caller ends the exchange. If you wish to end your exchange with a telemarketer, you must 'violate' a conversational 'rule' making exchanges with telemarketers are both awkward and entangling.

This information has been extracted from studies of the structure and rules that govern conversation conducted separately by Erving Goffman and Harvey Sacks during the 1980's.

Here's Looking At You, Kid

2007-01-29T21:11:00.000-08:00

Have you ever seen the man in the moon? How about faces in rocks and trees? The brain is wired to find and focus on faces.

In a study lead by neurobiologists from Harvard Medical Center (published in Science) titled, "A Cortical Region Consisting Entirely of Face-Selective Cells," it was observed that;
"Face perception is a skill crucial to primates. In both humans and macaque monkeys, functional magnetic resonance imaging (fMRI) reveals a system of cortical regions that show increased blood flow when the subject views images of faces, compared with images of objects. However, the stimulus selectivity of single neurons within these fMRI-identified regions has not been studied. We used fMRI to identify and target the largest face-selective region in two macaques for single-unit recording. Almost all (97%) of the visually responsive neurons in this region were strongly face selective, indicating that a dedicated cortical area exists to support face processing in the macaque."

So what we're looking at is a whole chunk of your brain that only lights up in response to a face. Now, if you think about it, looking at a picture of a face isn't tremendously different from looking at one of an apple; in both cases your visual centers perceive shape and colour/texture. That said, anyone can tell you that a face has much more (and more important) information than an apple. The brain has developed this face-sensitive area to a) make it harder for us to confuse faces for things, and b) to recognize when someone is looking at you.

Both of these functions make sense. You won't survive for long of you can't recognize the tigers face through the bushes or tell if he is, in fact, looking at you. In my "Minds and Brains" class we looked at other studies that have observed a related area of the brain in chimpanzees during facial recognition tasks, and they found that there are neurons that are specifically sensitive to recognizing faces at different angles (a neuron per degree from center, or something along those lines). Also, yet further studies indicate that the biggest keys to recognizing a face are the eyes. In this study they observed a dramatic increase in brain activity (in this area of interest) when eyes were added to an otherwise complete face.

http://anthropology.net/user/kambiz_kamrani/blog/2006/02/07/face_recognition_brain_maturation_and_mirror_neurons
http://www.sciencedaily.com/releases/1999/06/990624080203.htm

The Serious Side of Laughter

2007-01-26T23:12:00.000-08:00

Why do we laugh? When you consider the many different varieties of laughter we encounter every day, not just in response to an episode of The Daily Show, but in humor-free situations as well (like nervous or contemptuous laughter, etc), it becomes clear that there is no simple answer to this question.

Theories abound on the subject. Robert Provine claims that laughter merely a conversational attention grabber used to make sure that others know we're paying attention. Charles Darwin thought that laughter was an extension of smiling, and therefore simply associated with pleasure. He also called attention to the as-yet-unexplained phenomenon of excessive laughter impairing muscle coordination (have you ever fallen off a chair from laughing too hard?). Maybe instead laughter is a standard exhalation pattern signifying relief. Still others class laughter as a cooperative signal. JoAnne Bachorowski, a professor at Vanderbilt University, has studied a particular kind of voice-laughter which she considers to be a cooperative signal. Voice laughter is characterized by a melodious and gentle quality and occurs most frequently between good friends or romantic couples.

My own theory is that laughter and gesture may have similar functions in conversation and social interaction (especially when considering interactions that aren't face-to-face). Both gesture and laughter are used to provide emphasis or clarify an implicit point in conversation; you point to clarify where 'there' is, you laugh to let your listener know that you are joking (or uncomfortable, or contemptuous, or playful, etc. depending on the nature of the laughter and context).

Much of this post is based off of a lecture given by Dacher Keltner, PhD. in his class on the Psychology of Emotion at the University of California at Berkeley.
http://en.wikipedia.org/wiki/Dacher_Keltner

Nature vs. Nurture: Language Edition

2007-01-24T23:50:00.000-08:00

Noam Chomsky says that language is a uniquely human phenomenon. Even without this challenging and controversial claim, linguists have been trying to teach language to non-human species for the past century.

One of the most notable attempts of this sort was made in the 1930's by Winthrop and Luella Kellogg. Just three months after their son was born, the Kellogg family welcomed Gua the chimpanzee into their home. Their mission was to raise Gua alongside their son to scientifically compare the rate and extent of language acquisition between the two species. By the time Gua turned three the Kelloggs observed that she had not acquired much, if any, language. However, their son had developed a very, very convincing imitation of a chimpanzee. At this point the Kelloggs aborted their experiment.

Many other experiments (albeit more conventional and less personally risky) of this sort have been completed, with some success, however, thus far all of these experiments have more or less reached the conclusion that non-human species can acquire a complex system of signs, but their communication lacks several crucial elements of genuine language.

Emotion and Evolution

2007-01-22T20:45:00.000-08:00

Humans have somewhere between 30-40 facial muscles, which are manipulated to display different emotions. For example, the display of embarrassment is characterized by a tight-lipped/ puckering smile, touching one’s face, and turning ones head to reveal the neck. This display is both systematic and coordinated, and there is evidence that it is not culture-specific, as members of various non-Western cultures recognize this display as embarrassment. In fact, a similar behavior has been observed in non-human species in the form of appeasement displays. Non-human species (primarily mammals, especially the great apes) produce these displays when apologizing for mistakes, seeking reconciliation, or backing down from a confrontation with a more dominant member of the group. The appeasement display is indicated by an odd little smile, face-touching, exposing vulnerable areas (wolves show their necks), and shrinking their posture. This study is compelling evidence in the argument for the evolutionary (rather than social) origin of emotion and emotional displays.

A Thought Experiment

2007-01-20T22:53:00.000-08:00

Do you know that one square centimeter of brain tissue holds roughly one gigabyte of computing power and we don't really know what all is on the hard drive? Scientists of all sorts and sizes have their search engines running full blast, looking for structures and patterns in the system of mind and brain that connect us with everything we know and experience. Join me as I pick my way through the science of the mind.