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Biomedical subjects

M R Leippe

Publications and source records attributed to M R Leippe.

3 recordsLinked to original sources

Eyewitness memory for a touching experience: accuracy differences between child and adult witnesses.

Children, ages 5-6 and 9-10 years, and adults spent 6 min with a man (toucher) who administered a test that required interpersonal touch. The test was briefly interrupted by a woman (intruder). Afterward, the participant-witnesses provided a memory report that included free recall, answers to objective-memory questions, and two lineup identifications. Relative to the adults and older children, the 5- to 6-year-olds gave less complete free recall and made more errors in answering objective questions about the features and actions of the toucher and the intruder. On recognition tests, both the 5- to 6- and 9- to 10-year-olds were somewhat less likely than adults to make accurate lineup decisions about the toucher and much less likely to accurately identify the briefly seen intruder. Children may remember even salient stimuli and actions more poorly than adults do, but there was no evidence that children misremembered touches that did not occur.

Adolescent

In search of reliable persuasion effects: III. The sleeper effect is dead. Long live the sleeper effect.

The sleeper effect in persuasion is a delayed increase in the impact of a message that is accompanied by a discounting cue. Despite a long history, the sleeper effect has been notoriously difficult to obtain or to replicate, with the exception of a pair of studies by Gruder et al. (1978). We conducted a series of 16 computer-controlled experiments and a replication of the Gruder et al. study to demonstrate that a sleeper effect can be obtained reliably when subjects (a) note the important arguments in a message, (b) receive a discounting cue after the message, and (c) rate the trustworthiness of the message communicator immediately after receiving the discounting cue. These operations are sufficiently different from those used in earlier studies to justify a new differential decay interpretation of the sleeper effect, in place of the dissociation hypothesis favored by most previous sleeper effect researchers. According to the differential decay interpretation, a sleeper effect occurs when message and discounting cue have opposite and near-equal immediate impacts that are not well-integrated in memory. The effect occurs, then, if the impact of the discounting cue decays faster than that of the message.

Adult