Stimulus exposure effects in human associative learning |
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Authors: | Catherine E. Myers Lindsay M. Oliver Stacey G. Warren Mark A. Gluck |
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Affiliation: | Department of Psychology, Rutgers University, Newark, NJ 07102, USA. myers@pavlov.rutgers.edu |
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Abstract: | Learning that one cue (CS) predicts a second, salient cue (US) can often be slowed by prior exposure to one or both stimuli. In animals, CS-US learning is more strongly retarded following uncorrelated exposure to both CS and US than following exposure to the US alone. In this paper we present several studies showing a similar effect in humans, using a computer-based task. Experiments 1 and 2 used a between-groups design and demonstrated a strong CS/US exposure effect, whether or not the US was signalled by a neutral cue during exposure. Experiment 3 demonstrated similar effects using a within-subjects design. Overall, these results are consistent with several theoretical interpretations and suggest that uncorrelated CS/US exposure leads to a robust retardation of subsequent CS-US learning in humans. |
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