“…Had such a group been included, it would be expected that the change score of the working-class boys would be significantly less than that of the unrun control group, if they were, indeed, consciously resisting experimenter influence. This experiment was not originally designed to assess the relative adequacy of the social drive (Berkowitz, 1964;Erickson, 1962;Gewirtz & Baer, 19S8a, 19S8b) as opposed to the valence position (Berkowitz, Butterfield, & Zigler, 196S;Berkowitz & Zigler, 196S;McCoy & Zigler, 1965;Shallenberger & Zigler, 1961) in accounting for the differential effectiveness of social reinforcers following different types of social interaction. Nevertheless, the present findings do appear to lend some post hoc support to the valence position.…”