Smokers and Non-Smokers
And the smoke of their torment ascendeth up for ever and ever; and they have no rest day or night, who worship the beast and his image.
THE FACT THAT individual differences in the two main dimensions of personality are largely determined by heredity suggests very strongly that these dimensions of personality must depend on some physiological or neurological structures. The reason for this hypothesis is, of course, that it is conceivable that such structures should be transmitted through the physical action of the genes and chromosomes which carry hereditary information, but that it is not conceivable that behaviour patterns as such should be transmitted in this way without any reference to biological structures. Is there any evidence for a relationship between personality patterns and physiological structures ?
As far as neuroticism is concerned the answer is quite simple. It will be recalled that an alternative name for neuroticism which was first used by Wundt and has since been used by many others too is 'emotionality'. In other words, people who have a high score on tests of neuroticism tend to be people who have labile emotions, that is to say emotions that are easily aroused and which persist much longer than would be customary in the average person. Now there is a particular part of our nervous system which deals predominantly with the expression of the emotions. This is the so-called autonomic system which derives