"For Charles Darwin, this ‘odd state of mind’ was one of the great puzzles in his theory of evolution, for it appeared to offer no benefit to our species. ... in research begun in the 1970s, the Harvard psychologist Jerome Kagan suggested that about 10-15 per cent of infants are ‘born shy*’. Being easily fearful and less socially responsive, they reacted to mildly stressful situations with a quicker heartbeat and higher blood cortisol levels." - from "The Crystalline Wall" by Joe Moran, AEON, July 17, 2013.
I remember once taking a physical taste and smell sensitivity test to various flavors and sensations, such as sweet, sour, salty, spicy, overwhelming, etc. Can't remember exactly but the test included physical measuring techniques, kind of like litmus, that corroborated the subjective sensations. My shy-like-me son also took the test, which was administered by and compared with a non-shy person. Results clearly indicated strong differences between the shy, who measured more sensitive, and the non-shy. Not a scientific proof but interesting. Over the years I've also noticed a different sensitivity to sounds, pain tolerance, and etc.
I remember once taking a physical taste and smell sensitivity test to various flavors and sensations, such as sweet, sour, salty, spicy, overwhelming, etc. Can't remember exactly but the test included physical measuring techniques, kind of like litmus, that corroborated the subjective sensations. My shy-like-me son also took the test, which was administered by and compared with a non-shy person. Results clearly indicated strong differences between the shy, who measured more sensitive, and the non-shy. Not a scientific proof but interesting. Over the years I've also noticed a different sensitivity to sounds, pain tolerance, and etc.
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