Abstract The possible predictive relationship of extraversion and emotionality, singly and combined into Eysenck's (1961) 4-fold classification, was examined for differential cognitive and physiological responsiveness to relaxation training, hypnotic suggestion, and a self-relaxation control procedure, and to the degree of inhibition of the physiological response to stressful imagery resulting from the treatment procedures. A total of 60 unselected female Ss, covering the full range on both personality scales, participated in 2 experimental sessions, 1 week apart. Non-significant relationships were found between the personality characteristics and the previously reported individual or combined response to treatment procedures.