“The present study investigated the questions of whether deficit would obtain for schizophrenics on a timed task of nonsocial content and, if so, whether the deficit would increase or decrease over trials under a condition of nonreinforcement and, finally, differentially affect the subsequent performance of schizophrenics and normals . . ‥ The results indicated that both schizophrenics and normals responded with enhanced performance to the negative conditions, but that only the schizophrenics demonstrated enhanced performance under the positive condition.” 15 references. (PsycINFO Database Record (c) 2006 APA, all rights reserved)