Recent research in cognitive science has demonstrated that when people vividly imagine or visualize personal childhood events, their subjective con®dence increases in the probability that these visualized incidents actually occurred. This study seeks not only to replicate what has been called the imagination in¯ation eect in a sample of undergraduates and middleaged factory workers but also to identify individual dierence variables that could predict susceptibility to suggestibility. Drawing from Rotter's (1982) social learning theory and Benjamin's (1974) structural analysis of social behaviour (SASB) model for interpersonal behaviour, the two experiments reported test the extent to which locus of control for reinforcement, dissociability, and a hostile/self-controlling introject (self-concept) could predict the imagination in¯ation eect. Results indicate that: imagination in¯ation is a robust and replicable phenomenon with young adults, but did not occur in a non-college population; with undergraduates, both external locus of control and dissociability correlate in a positive, signi®cant, and predicted way with suggestibility; introject variables correlate signi®cantly with imagination in¯ation, but not in the predicted manner. Findings are discussed in terms of helping psychologists better understand potential iatrogenic processes in psychotherapy.
In two experiments, the authors explored factors that might influence a person's tendency to make source-monitoring errors about autobiographical memories. In the first experiment, undergraduates retrieved a memory from childhood (a) that was known about but not remembered, (b) that was remembered, or (c) for which they were unsure of their memory's source. After writing down the memory, experimental groups listened to a guided visualization tape and answered questions about the event--interventions designed to help them focus on details of their memory. Controls also retrieved and wrote down a memory; however, instead of visualizing the memory, they were instructed to conduct a visual search task. Results indicated that guided visualization led participants to rate known memories closer to remembered events. A second experiment examined individual difference variables that might be related to this know-to-remember shift. Results indicated that extraversion, external locus of control, a memory that conveyed fear, and overall affective content predicted this rating. The applicability of these findings to the psychotherapy process is discussed.
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