Ss saw 6 instances defining a 1-dimension solution for a 6-dimension concept problem, then gave a solution and were tested for recall or recognition of the instances. Different groups studied each instance for 5, 8, or 15 sec. of presentation time (PT). Proportion of solutions increased with PT. Recall of relevant and irrelevant dimensions was considerably more accurate on solved than unsolved problems, and there was a small but significant increase in recall with PT. Recognition memory also improved slightly with PT, and was slightly higher on solved than unsolved problems. Recall as a function of serial position in the presentation sequence revealed a typical bowed curve. Serial position functions for recognition memory were flat, except for the 1st 2 instances presented, which were more likely to be recognized if the problem was solved. (22 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1969 American Psychological Association.
