pleasure–unpleasuren.

1900 Mind 9 386 It is not a simple sensation nor a simple feeling (certainly not a feeling of the pleasure-unpleasure series).

1901 Mind 10 475 The necessary difficulty of reaching any satisfactory solution of the problem of pleasure-unpleasure, so long as one adheres to the customary division of mental processes.

1949 A. Koestler Insight & Outlook xv. 208 The nervous processes which determine the pleasure-unpleasure tone of emotional experience.

1986 H. K. Bhabha in F. Barker et al. Lit., Politics & Theory viii. 154 The creation of a space for a ‘subject peoples’ through the production of knowledges in terms of which surveillance is exercised and a complex form of pleasure/unpleasure is incited.

2011 S. Bowden Priority of Events v. 212 With respect to the objects-images of satisfaction corresponding to the pleasure-unpleasure series, Deleuze emphasizes their role..in a number of different ways.

1921 Pedagogical Seminary Mar. 11 There is undoubtedly some kind of a system in the boy, built up largely on the ‘pleasure-unpleasure’ principle.

1980 H. W. Loewald Papers on Psychoanal. i. vi. 79 What is new in Freud's last instinct theory is the life instinct as a force or tendency sui generis, not reducible to the old pleasure-unpleasure principle.

2013 J. S. Blackman Therapist's Answer Bk. xi. 40 The so-called pleasure principle or ‘pleasure–unpleasure principle’ operates in the vast majority of human beings most of the time.