Neuroscience
The chances are, you're not as big-headed as you think. I don't mean you're modest. I mean, literally, that the physical size of your head is smaller than you think it is.
I say this because a team of psychologists led by Ivana Bianchi have shown that students overestimated the size of their own heads, but not other people's, by between 30 and 42 per cent, on average. Other people's head sizes were also overestimated if their size was judged from memory - although the overestimation was not as large as when the students' judged their own heads. Similar results were found whether the students indicated head size by drawing an outline on paper or by demonstrating size with a tape measure.
As a comparison task, students estimated the size of their own and other people's hands. If anything, this led to underestimation.
The overestimation of head size was almost entirely removed when students made their estimates with the help of a mirror, and also if they wore a headband from the top of the head to the chin (thus providing proprioceptive feedback).
In a neat, final study, the researchers compared the size of heads in portraits and self-portraits dating from the fifteenth to twentieth century. Head size was bigger in the self-portraits.
The researchers don't really know why we overestimate our head size. The fact we can't see it directly no doubt has something to do with it. However, another possibility, according to Bianchi's team, is that thinking our heads are bigger than they really are is actually just another self-serving delusion - similar to the way most of us think we're cleverer and more attractive than is really the case.
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Bianchi, I., Savardi, U., Bertamini, M. (2008). Estimation and representation of head size (people overestimate the size of their head – evidence starting from the 15th century). British Journal of Psychology DOI: 10.1348/000712608X304469
Post written by Christian Jarrett (@psych_writer) for the BPS Research Digest.
Link to related Digest item: "Does my head look big in this?"
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Neuroscience
You're not as big-headed as you think you are
The chances are, you're not as big-headed as you think. I don't mean you're modest. I mean, literally, that the physical size of your head is smaller than you think it is.I say this because a team of psychologists led by Ivana Bianchi have shown that students overestimated the size of their own heads, but not other people's, by between 30 and 42 per cent, on average. Other people's head sizes were also overestimated if their size was judged from memory - although the overestimation was not as large as when the students' judged their own heads. Similar results were found whether the students indicated head size by drawing an outline on paper or by demonstrating size with a tape measure.
As a comparison task, students estimated the size of their own and other people's hands. If anything, this led to underestimation.
The overestimation of head size was almost entirely removed when students made their estimates with the help of a mirror, and also if they wore a headband from the top of the head to the chin (thus providing proprioceptive feedback).
In a neat, final study, the researchers compared the size of heads in portraits and self-portraits dating from the fifteenth to twentieth century. Head size was bigger in the self-portraits.
The researchers don't really know why we overestimate our head size. The fact we can't see it directly no doubt has something to do with it. However, another possibility, according to Bianchi's team, is that thinking our heads are bigger than they really are is actually just another self-serving delusion - similar to the way most of us think we're cleverer and more attractive than is really the case.
_________________________________
Bianchi, I., Savardi, U., Bertamini, M. (2008). Estimation and representation of head size (people overestimate the size of their head – evidence starting from the 15th century). British Journal of Psychology DOI: 10.1348/000712608X304469
Post written by Christian Jarrett (@psych_writer) for the BPS Research Digest.
Link to related Digest item: "Does my head look big in this?"
Link to related Digest item: "Robert the Bruce's skull size shows he had high IQ"
- Head Size And Attention-to-detail Are Linked In Children With Autism
Like many people with autism, the celebrated artist Stephen Wiltshire has an incredible ability to focus on small details, as evidenced by his beautifully intricate art-work (see image). However, in the lab, psychologists have struggled to pin down this...
- Robert The Bruce's Skull Size Shows He Had High Iq
In a paper featuring an irresistible mix of history and psychology, researchers have estimated Robert the Bruce's IQ from his skull size and concluded that he was a highly intelligent man. Ian Deary and colleagues first established the relationship...
- Communicating Off The Top Of Your Head
Forget lip-reading, the way the top of the head moves as we speak also plays a part in communication, a finding that has implications for creating more realistic animated characters. In an initial experiment, Chris Davis and Jeesun Kim presented students...
- Concussion Took Kit For High School Coaches
The CDC (Centers for Disease Control) has put together a "tool kit" of material and resources for high school coaches called Heads Up: Concussion in High School Sports, which is accessible at this link on the CDC website. The material includes content...
- Neuroanatomy In The News!
From tomorrow's Washington Post, an article about the relevance of the architecture of crossed motor and sensory pathways (cool!):What Crosses Our Minds When Danger's Afoot By David Brown Washington Post Staff Writer Monday, June 13, 2005; Page...