The relationship of extraversion and neuroticism to the EEG

Extraversion and the EEG: I. An evaluation of Gale's hypothesis

The hypothesis of A. Gale that extraverts differ from introverts in EEG defined arousal only under moderately arousing conditions is examined. It is argued that the hypothesis is not entirely internally consistent and lacks empirical support. A re-analysis of the literature on which it was based points to problems in the measurement of extraversion as a more significant source of confounding than variation in conditions of testing.

Resting levels of alpha and the Eysenck Personality Inventory

The number of microvolt seconds of alpha rhythm emitted during a five-minute period were collected for 30 male and 30 female subjects. This measure of alpha abundance was then compared in subjects who scored high and in those who scored low on the E and N scales of the Eysenck Personality Inventory. Subjects who scored low on the E scale tended to have a significantly greater number of microvolt seconds of alpha than did subjects who scored high on the scale. No differentiation on the basis of emitted alpha was possible for subjects scoring high and low on the N scale.

Personality variables and alpha enhancement: a correlative study

Investigations into possible relationships between EEG and personality traits began in 1935 (Lemere, 1935), and have continued sporadically (Saul et al., 1937; Gottlober, 1938; Lindsley, 1938; Henry and Knott, 1941). More recently there has been a controversial British exchange (Savage, 1964; Fenton and Scotton, 1967; Broadhurst and Glass, 1969; Young et al., 1971).

Research report: Institute of Psychiatry Clinical Psychopharmacology Research Team

In 1960, the National Institute of Mental Health of the U.S.A. provided research support to Professor H. O. Schild of the Department of Pharmacology, University College London (U.C.L.) and to Dr. (now Professor) Michael Shepherd of the Department of Psychiatry, Institute of Psychiatry, University of London, for studies in human psychopharmacology. The research assistants initially employed were Dr. Lorna Wing, Dr. J. D. Montagu, and Dr. Malcolm Lader and work was carried out at U.C.L., the Institute of Psychiatry, and Runwell Hospital, Essex. In 1966, the Medical Research Council assumed responsibility by appointing Dr. Lader to their External Scientific Staff. Other support has come from the Bethlem Research Fund and from the pharmaceutical industry, in particular Roche (U.K.) Ltd. and May and Baker, Ltd. A group of six to eight workers has thus been built up based mainly in the Institute of Psychiatry but with continuing links to U.C.L. At present our team comprises pharmacologists, psychiatrists, psychologists, a physiologist, a chemist, and a mathematician. Several workers from abroad on British Council or Commonwealth Fellowships have been attached to the team at various times, and students for higher degrees such as PhD and MD have been welcomed.