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Conjunction benefits and costs reveal decision priming for first-order and second-order features
Lisa R Fournier1, Robert Patterson, Brian P Dyre
1Department of Psychology, Washington State University, Pullman, Washington 99164-4820, USA. fournier@wsunix.wsu.edu
Abstract:
Across two experiments, decision priming was examined for conjunctions composed of first-order or first- and second-order stimulus features. Observers indicated the presence or absence of one or two features in a Gabor stimulus. When a pair of stimulus features differed in their speed of discrimination, responses indicating the presence of a conjunction were faster than those for the single feature for which discrimination was slowest (conjunction benefits). Also, responses indicating the absence of a conjunction were delayed if one of the features was present (conjunction costs). These results show that first- and second-order features can prime decisions about the presence of a conjunction and suggest that the two kinds of signals can be combined at a decision stage after the discrimination of stimulus properties has begun for each system.
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