In a recent series of papers, Pearce and colleagues (e.g., Pearce, Dopson, Haselgrove, & Esber, 2012) have demonstrated a so-called "redundancy effect" in Pavlovian conditioning, which is the finding of more conditioned responding to a redundant cue trained as part of a blocking procedure (A+AX+) than to a redundant cue trained as part of a simple discrimination procedure (BY+CY-). This phenomenon presents a serious challenge for those theories of conditioning that compute learning through a global error-term. In this paper, we use the Rescorla and Wagner (1972) model as a prototypical example to demonstrate that the redundancy effect can be accounted for by this class of theories if the experimental stimuli are assumed to share a common component. We also point to some domains in which this approach leads to novel predictions that may deserve empirical evaluation. (PsycINFO Database Record
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Article Synopsis
- In two experiments, participants learned to predict stomachaches based on food items, identifying cues that indicated the presence or absence of the ailment.
- Both experiments involved a blocking treatment where certain cues signaled stomachache, leading to tests showing a redundancy effect that favored one cue (X) over another (Y) as a more reliable predictor.
- The findings challenge traditional theories about cue competition and support the idea that changes in attention influence learning with multiple cues.
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