Sodium Amytal and Extraversion

Extraversion" and " introversion " are descriptive terms denoting two types of behavioural reaction and personality organization widely recognized and described in psychological literature (Guilford, 1934; Eysenck, 1953). "Extraverted behaviour " is characterized clinically by the outward expression of feelings and attitudes, in words; gestures, and acts, in a spontaneous and direct manner, little im- peded by reflection, indecision, or reserve. The contrary, " introverted behaviour ", comprises a tendency to limit or moderate spontaneous outward expression, reflection, preoccupation, and rumina- tion rather predominating. A reserved or even with- drawn attitude may be maintained. While individual people may be predominantly introverted or extra- verted in their behaviour, fluctuation normally occurs from one form to the other. Introducing these types Jung (1923) writes: " But every individual possesses both mechanisms -extraversion as well as introversion-and only the relative predominance of the one or the other deter- mines the type. " (p. 10)