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|Title:||A Behavioral Assessment of the Weights Applied to Redundant Cues|
|Author(s):||Cuqlock, Violet Grayson|
|Department / Program:||Psychology|
|Degree Granting Institution:||University of Illinois at Urbana-Champaign|
|Abstract:||A new procedure for determining the weights individuals apply to cues when making predictions was evaluated in this study. Thirty nine college students were separately given the opportunity to learn the degree to which five cues were redundant and valid predictors of a criterion variable. Each subject was then required, on any given trial, to select either all five cues or a subset of size one to four to use to make predictions. The subjects' selections of cues were assumed to be determined by the subjective weights assigned to the cues during the prediction task.
The procedure proved successful in determining the weights. In addition, results showed that subjects departed, increasingly, from the optimal sampling of cues as the redundancy between the two most valid cues increased. Specifically, the weight applied to the most valid cue decreased, linearly, across groups, with an increase in redundancy. This decrease could be attributed, in part, to an increase in the weight given to the second most valid cue as its correlation with the most valid cue increased. These results are consistent with the definition of redundancy as given by the zero order correlation between cues, and inconsistent with the definition of redundancy as the overlap of criterion variance accounted for by cues. Implications of the results for improvements in human performance in information integration tasks are discussed.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1983.
|Date Available in IDEALS:||2014-12-15|