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Zanjan University of Medical Sciences, Zanjan, Iran
Abstract:  

Introduction: There are two alternative explanations of Stroop phenomenon. Several studies have revealed that the difference in performance on congruent and incongruent trials can arise from response interference. In contrast to this view, several authors have claimed that Stroop interference might occur at earlier processing stages related to semantic or conceptual encoding. The aim of present study is to determine the number and nature of the factors necessary to account the multiple components of Stroop interference.
Methods: The sample consisted of 247 undergraduate and postgraduate students. The computerized version of Stroop task adapted to Iranian Population was employed. An exploratory principal components analysis was conducted on the correlations of the six variables (reaction time under congruent and incongruent conditions, Omission error under congruent and incongruent conditions, and commission error under congruent and incongruent conditions).
Results: Two factors were extracted. The first factor seems to be semantic interference and the second factor seems to be response interference.
Conclusions: The findings of this research are consistent with multiple-stage account claims that Stroop interference is due to both semantic and response interference.

Type of Study: Original | Subject: Cognitive Neuroscience
Received: 2017/08/27 | Accepted: 2018/09/19

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