Generalization decrements: further support for flexibility in stimulus processing |
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| Authors: | Thorwart Anna Lachnit Harald |
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| Institution: | Philipps-Universit?t Marburg, Marburg, Germany. anna.thorwart@sydney.edu.au |
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| Abstract: | Thorwart and Lachnit (2009) found reliable symmetrical decrements in two generalization tasks: Removing an already trained
component from a compound did not result in larger decrements than adding a new one did. In two contingency learning experiments,
we investigated first whether time pressure during stimulus processing, as well as the degree of perceptual grouping, was
effective in controlling the symmetry of the decrements (Experiment 1); and second, whether the symmetry was affected by the
causal versus predictive nature of the relationship between the cue and the outcome (Experiment 2). The experiments generated
unexpected results, since both revealed asymmetrical decrements independent of the manipulations introduced. They therefore
demonstrate that more research is needed in order to understand the variables influencing stimulus representation in human
associative learning. |
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