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BRIEF REPORTS

Mood-congruent bias and attention shifts in the different episodes of bipolar disorder

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Pages 1114-1121 | Received 24 Jul 2012, Accepted 03 Jan 2013, Published online: 29 Jan 2013
 

Abstract

An “affective” go/no-go task was used in the different episodes of bipolar patients (euthymic, depressed, and manic) to examine (1) the presence of a mood-congruent attentional bias; and (2) the patients' ability to inhibit and invert associations between stimuli and responses through blocks. A group of healthy individuals served as controls. Results revealed a mood-congruent attentional bias: patients in the manic episode processed positive information faster, whereas those in the depressive episode processed negative information faster. In contrast, neither euthymic patients nor healthy individuals showed any mood-congruent biases. Furthermore, there was a shift cost across blocks for healthy individuals, but not for the patients. This may reflect a general impairment at selecting relevant information (e.g., in terms of disability to inhibit and invert associations between stimuli and responses) in bipolar participants, regardless of their episode. This state/trait dissociation in an episodic and chronic disorder such as bipolar disorder is important for its appropriate characterisation.

Acknowledgments

This research has been partly supported by Grant PSI2011-26924 from the Spanish Ministry of Economy and Competitiveness. Ana García-Blanco was the recipient of a postgraduate grant from the program “Atracció de Talent” at the University of Valencia (VLC-Campus).

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