Schizophrenia Clinical Trial
Official title:
Evaluation of Stroop Effect in Patients With Schizophrenia
The main objective of this study is to assess whether attention deficits and executive functions in patients with schizophrenia are general (semantic and response conflict) or specific (semantic or response conflict).
First, participants will receive six categories of stimuli presented in a classical way: (1)
incongruous stimulus classical (BLUE written in green for example); (2) associated
incongruous stimuli (SKY written in green for example); (3) conventional congruent stimuli
(BLUE written in blue for example); (4) associated congruent stimuli (SKY written in blue
for example); (5) neutral words (BRIDGE written in green for example); And (6) neutral
stimulus (XXXX written in green for example).
In a second step (after a 5 minute break), they will receive these six categories of
stimuli, but only half will be presented in a classic way and the other half will be
presented in order to attract attention as in Augustinova and Ferrand 2007). To do this, in
(1) incongruous stimuli classical like BLUE, a single letter (like B for example) will be
colored in green for example and the rest of the word (LUE) will appear in gray); In (2)
incongruous stimuli associated as SKY, only K for example will be green and the rest of the
word will appear in gray); In (3) conventional congruent stimuli such as BLUE, only B for
example will be written in blue and the rest of the word will appear in gray); In (4)
associated congruent stimuli such as SKY only K for example will be written in blue and the
rest of the word will appear in gray); In (5) neutral words like BRIDGE, only D will be
colored in green for example and the rest of the word will appear in gray; And finally, in
(6) neutral stimuli like XXXX, only one X will be colored in green for example and the rest
of the X will appear in gray.
The task will be to name the color of each word (by stating the color verbally) as quickly
and correctly as possible, while ignoring the written word. In this experiment, we will
measure the time taken to denominate the color (in milliseconds) as well as the percentages
of incorrect answers.
The first step allows to determine the stroop effect and the second the semantic conflict.
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