The ability of M. Levine's subset-sampling assumptions to account for the decrease in response latency following the trial of the last error was investigated by employing a distributed stimulus set composed of four binary dimensions and a procedure which required Ss to make an overt response in order to sample each dimension. (Author)

The stimulus-familiarization-effect (SFE) paradigm, a reaction-time (RT) task based on a response to novelty procedure, was modified to assess response for novelty, ie., a response-reinforcement sequence. The potential implications of attention for reinforcement theory and learning in general are discussed. (Author/CS)

Response rates and latencies of white, lower-, and middle-class preschool children were measured in an experimentally-induced frustration situation. Socioeconomic class differences in frustration situation. Socioeconomic class differences in frustration reactions were found; two possible hypotheses are offered in explanation. (SDH)