Patients in token-economy programs are generally unable to reinforce each other's behavior with tokens and social interaction among patients is usually minimal. In this study, all patients on a token economy ward of a state hospital were given a daily allowance of special transferable tokens in addition to whatever other tokens they earned. Transferable tokens could be spent by any patient except the one to whom they were issued. Both the frequency of social interaction and the number of different patients interacted with increased significantly.
Correlates of amount of liking, actual amount of interaction, and subjectively perceived amount of interaction were investigated in 38 patients on two state psychiatric hospital wards. Liking and actual amount of interaction were not correlated with each other. Measures of both perceived and actual physical attractiveness, familiarity, reciprocity of liking, personality similarity, and attitude similarity were obtained. Perceived measures of all of these variables correlated highly with liking and somewhat less highly with perceived interaction. With the exception of perceived familiarity, none of them were consistently correlated with actual interaction. Actual measures of the variables were not correlated with liking, perceived interaction, or actual interaction. The implications of the results for theories of interpersonal attraction are discussed.A great deal of research concerning interpersonal attraction has been carried out in the last 25 years. The primary determinants of interpersonal attraction now seem to be familiarity, similarity of attitudes and of personality, reciprocity of liking or rewardingness, and physical attractiveness (cf. Berscheid & Walster, 1969;Murstein, 1971). Most research has relied upon self-reports of degree of attraction between subjects rather than upon behavioral measures. Evidence has not been conclusive that the laws governing subjective measures of interpersonal attraction also explain behavioral attraction or interaction (Lindzey & Byrne, 1968). It seems fairly clear that we know a great deal about liking, but it is not at all clear that this means that we therefore also know a great deal about inter-
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