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Communication Dans Un Congrès Année : 2018

Hemispheric dominance for non-emotional information? An autonomic approach


The physiological reactivity to emotional information is known to be modulated by psychological traits. However, few is known about how the location of such information in the visual field modulates this reactivity. The aim of this study was (1) to compare physiological variations in response to neutral and emotional pictures presented in central vision and in the left and the right hemifields, and (2) to investigate the relation between these variations and depressive trait. Twenty-four healthy participants were presented with 3 sets of 16 pictures (unpleasant, neutral and pleasant) from the International Affective Picture System, at three eccentricities (). The sets had been balanced as for main physical properties of the pictures, among which brightness, contrast and spatial frequencies. The participants had to fixate a cross in the center of the screen and to report the location of the pictures (left, center or right). Participants fulfilled questionnaires (depression, BDI; anxiety, STAI) and we recorded cardiac and electrodermal (ED) responses to pictures. A greater cardiac deceleration to right than left presented stimuli was observed for neutral pictures but not for emotional ones. Interestingly, this effect was positively correlated with depression scores. Besides, participants showed greater ED responses to right presentation for neutral pictures and the reverse pattern was observed for emotional ones. This study seems to show (1) a stronger coding of neutral pictures when they appear in the right hemifield and also (2) that this effect is modulated by depression scores. These results could indicate that the neutral information is preferentially processed by the left hemisphere, as a complementary role to the right hemisphere dominance to process emotional one.
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hal-03388271 , version 1 (20-10-2021)



Lucas de Zorzi, Stephane Ranfaing, Jacques Honore, Henrique Sequeira. Hemispheric dominance for non-emotional information? An autonomic approach. 19th World Congress of Psychophysiology (IOP 2018), International Organization of Psychophysiology, Oct 2018, Lucca, Italy. ⟨10.1016/j.ijpsycho.2018.07.343⟩. ⟨hal-03388271⟩
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