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  • Title: Summation in causal learning: elemental processing or configural generalization?
    Author: Collins DJ, Shanks DR.
    Journal: Q J Exp Psychol (Hove); 2006 Sep; 59(9):1524-34. PubMed ID: 16873106.
    Abstract:
    Results from human causal learning tasks that employ multiple cues are often interpreted in terms of the elemental theory of Rescorla and Wagner (1972). However, most results can also be successfully interpreted by the configural model proposed by Pearce (1987, 1994). One method of discriminating between these alternatives is through an investigation of summation and overexpectation. Indeed, demonstrations of these phenomena are fundamental to an elemental approach but are generally incompatible with an account that involves configural processing. Using a procedure in which the magnitude of the outcome varied, evidence for both summation and overexpectation was obtained in two experiments.
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