Symmetrical generalization decrements: Configural stimulus processing in human contingency learning |
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| Authors: | Anna Thorwart and Harald Lachnit |
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| Institution: | (1) School of Psychology, Cardiff University, Cardiff, CF10 3AT, Wales;(2) Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA |
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| Abstract: | Models of associative learning differ in their predictions concerning the symmetry of generalization decrements. Whereas Pearce’s
(1994) configural model predicts the same response decrement after adding elements to and after removing elements from a previously
trained stimulus, elemental models, such as the replaced elements model and Harris’s (2006) model, anticipate more of a decrement
for removing than for adding elements. In three contingency learning experiments, we manipulated the motion and the spatial
arrangement of colored dots in order to induce configural or elemental processing by perceptual grouping. The results reliably
showed symmetrical decrements for the added and removed groups. The manipulations of the stimuli had no effect on stimulus processing. This is in line with Pearce’s configural model,
but it is at variance with the elemental models and previous studies. |
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