RT Journal A1 MILLER RE, MURPHY JV, MIRSKY I T1 RElevance of facial expression and posture as cues in communication of affect between monkeys JF A.M.A. Archives of General Psychiatry JO A.M.A. Archives of General Psychiatry YR 1959 FD November 1 VO 1 IS 5 SP 480 OP 488 DO 10.1001/archpsyc.1959.03590050048006 UL http://dx.doi.org/10.1001/archpsyc.1959.03590050048006 AB Some form of nonverbal communication is involved to a variable degree in every human interaction. Even verbal communication involves more than just the words that are used; intonation, speed of speech, gestures, and a variety of other factors modify the meaning of the words.20,21 Further, every “intuitive” percept and every “empathic” relationship are dependent upon some nonverbal communication of affects. Although the precise nature of this form of communication is still obscure, it undoubtedly plays a significant role in the social relations among men,22,23 among animals,12,21 and between man and animal.6,14In order to delineate the factors involved in the communication of affects, a method was devised for the experimental study of such communication among monkeys.15 Thus, a monkey was conditioned to press a bar (conditioned avoidance response) at the sight of another monkey (conditioned stimulus) which served as a signal