Exploring the Effect of Stimulus Similarity on the Summation Effect in Causal Learning
Abstract
Several contemporary models anticipate that the summation effect is modulated by the similarity between the cues forming a compound. Here, we explore this hypothesis in a series of causal learning experiments. Participants were presented with two visual cues that separately predicted a common outcome and later asked for the outcome predicted by the compound of the two cues. Similarity was varied between groups through changes in shape, spatial position, color, configuration, and rotation. In variance with the predictions of these models, we observed similar and strong levels of summation in both groups across all manipulations of similarity. The effect, however, was significantly reduced by manipulations intended to impact assumptions about the causal independence of the cues forming the compound, but this reduction was independent of stimulus similarity. These results are problematic for similarity-based models and can be more readily explained by rational approaches to causal learning.
Additional Information
© 2018 Hogrefe Verlag. Received June 11, 2017; Revised October 2, 2017; Accepted February 13, 2018; Published online August 31, 2018.Additional details
- Eprint ID
- 89348
- Resolver ID
- CaltechAUTHORS:20180904-091133929
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2018-09-04Created from EPrint's datestamp field
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2023-04-13Created from EPrint's last_modified field