Mixing incompatibly mapped location-relevant trials with location-irrelevant trials: effects of stimulus mode on the reverse Simon effect |
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Authors: | Robert W Proctor Julie Gerred Marble Kim-Phuong L Vu |
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Institution: | (1) Department of Psychological Sciences, Purdue University, West Lafayette, IN 47907-1364, USA Tel.: +1-765-4940784; Fax: +1-765-4961264 e-mail: proctor@psych.purdue.edu, US |
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Abstract: | When location-relevant trials with an incompatible spatial stimulus-response mapping are mixed with location-irrelevant trials,
responses on the latter trials are faster when stimulus and response locations do not correspond than when they do. Experiments
1 and 2 showed that this reverse “Simon effect” also occurs when the location information is presented verbally or symbolically
on both location-relevant and location-irrelevant trials. The reversal was absent, however, in conditions of Experiments 1–3
in which the mode of presentation was different on the location-relevant trials than on the location-irrelevant trials. Experiment
4 demonstrated that differences in physical characteristics between the location-relevant and location-irrelevant stimuli
were not sufficient to eliminate the reverse Simon effect. These findings imply that the short-term associations between stimulus
location information and responses defined for the location-relevant task are relatively mode specific.
Received: 21 December 1999 / Accepted: 26 April 2000 |
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