Hypermnesia occurs in recall but not in recognition

Two experiments investigated the effect of encoding conditions and type of test (recall vs. recognition) on the phenomenon of hypermnesia (improved performance across repeated tests). Subjects in Experiment 1 studied a list of words using either imaginal or semantic elaboration strategies and then received three successive tests. Different groups of subjects received either free recall, four-alternative forced-choice recognition, or yes/no recognition tests. Reliable hypermnesia was found only in the recall conditions, with the recognition conditions showing either no change in performance levels across tests (forced-choice tests) or significant forgetting (yes/no tests). In Experiment 2, subjects studied a list of words, and encoding was manipulated using three orienting tasks. Once again, hypermnesia was found with the recall tests but not with the forced choice recognition tests. Finding hypermnesia in recall but not in recognition indicates that retrieval processes in recall play a major role in producing hypermnesia. Also, the finding that the magnitude of the recall hypermnesias increased with an increase in total cumulative recall levels across study conditions suggests that cumulative recall levels are an important factor in determining the presence or absence of recall hypermnesia.     

Social-psychological correlates of adolescent and youthful suicide

Recently it has been suggested that social-psychological profiles of suicide attempters are useful to identify high-risk persons. There also is evidence that the complexity of interpersonal and intrapersonal factors constrict the extent to which such identification can be made. Using data from a nonprobability sample of 455 adolescent and youthful committers to test the hypothesis that attempters and committers do not differ with respect to environmental and stress-producing factors, the results reveal some differences between committers and attempters. Social-psychological characteristics of committers and factors relating to their social support systems are also discussed in the context of these differences.