Emotional Picture Perception: Repetition Effects in Free-Viewing and during an Explicit Categorization Task

Several studies have found that, despite a decrease in the overall amplitude of the late positive potential (LPP) with repeated presentation of the same picture, emotional stimuli continue to elicit a larger LPP than neutral ones. These findings seem to support the hypothesis that the affective modu...

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Main Authors: Serena Mastria, Vera Ferrari, Maurizio Codispoti
Format: Article
Language:English
Published: Frontiers Media S.A. 2017-07-01
Series:Frontiers in Psychology
Subjects:
Online Access:http://journal.frontiersin.org/article/10.3389/fpsyg.2017.01001/full
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author Serena Mastria
Vera Ferrari
Maurizio Codispoti
author_facet Serena Mastria
Vera Ferrari
Maurizio Codispoti
author_sort Serena Mastria
collection DOAJ
description Several studies have found that, despite a decrease in the overall amplitude of the late positive potential (LPP) with repeated presentation of the same picture, emotional stimuli continue to elicit a larger LPP than neutral ones. These findings seem to support the hypothesis that the affective modulation of the LPP reflects a mandatory process and does not rely on stimulus novelty. However, in these studies participants were asked to merely look at the pictures, without carrying out any additional task (free-viewing), making picture emotionality the most salient aspect of the stimulus, despite its repetition. The current study aimed to examine the impact of an explicit categorization task on the emotional processing of repeated pictures. To this purpose, ERPs to novel and repeated pictures were measured during free-viewing as well as during an explicit categorization task, where the emotional content of the pictures was task-irrelevant. The within-subject comparison between the free-viewing and task context revealed that the overall LPP habituated more rapidly in the free-viewing condition, but, more importantly, the LPP affective modulation was unaffected by task requirements during both novel and repeated presentations. These results suggest that the affective modulation of the LPP reflects an automatic engagement of cortico-limbic motivational systems, which continues to take place regardless of stimulus novelty and task context.
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spelling doaj.art-f7369b96394940188bf85cd7b43ffa492022-12-21T22:59:38ZengFrontiers Media S.A.Frontiers in Psychology1664-10782017-07-01810.3389/fpsyg.2017.01001261258Emotional Picture Perception: Repetition Effects in Free-Viewing and during an Explicit Categorization TaskSerena Mastria0Vera Ferrari1Maurizio Codispoti2Department of Psychology, University of BolognaBologna, ItalyDepartment of Medicine and Surgery, University of ParmaParma, ItalyDepartment of Psychology, University of BolognaBologna, ItalySeveral studies have found that, despite a decrease in the overall amplitude of the late positive potential (LPP) with repeated presentation of the same picture, emotional stimuli continue to elicit a larger LPP than neutral ones. These findings seem to support the hypothesis that the affective modulation of the LPP reflects a mandatory process and does not rely on stimulus novelty. However, in these studies participants were asked to merely look at the pictures, without carrying out any additional task (free-viewing), making picture emotionality the most salient aspect of the stimulus, despite its repetition. The current study aimed to examine the impact of an explicit categorization task on the emotional processing of repeated pictures. To this purpose, ERPs to novel and repeated pictures were measured during free-viewing as well as during an explicit categorization task, where the emotional content of the pictures was task-irrelevant. The within-subject comparison between the free-viewing and task context revealed that the overall LPP habituated more rapidly in the free-viewing condition, but, more importantly, the LPP affective modulation was unaffected by task requirements during both novel and repeated presentations. These results suggest that the affective modulation of the LPP reflects an automatic engagement of cortico-limbic motivational systems, which continues to take place regardless of stimulus novelty and task context.http://journal.frontiersin.org/article/10.3389/fpsyg.2017.01001/fullemotionrepetitioncategorizationlate positive potential
spellingShingle Serena Mastria
Vera Ferrari
Maurizio Codispoti
Emotional Picture Perception: Repetition Effects in Free-Viewing and during an Explicit Categorization Task
Frontiers in Psychology
emotion
repetition
categorization
late positive potential
title Emotional Picture Perception: Repetition Effects in Free-Viewing and during an Explicit Categorization Task
title_full Emotional Picture Perception: Repetition Effects in Free-Viewing and during an Explicit Categorization Task
title_fullStr Emotional Picture Perception: Repetition Effects in Free-Viewing and during an Explicit Categorization Task
title_full_unstemmed Emotional Picture Perception: Repetition Effects in Free-Viewing and during an Explicit Categorization Task
title_short Emotional Picture Perception: Repetition Effects in Free-Viewing and during an Explicit Categorization Task
title_sort emotional picture perception repetition effects in free viewing and during an explicit categorization task
topic emotion
repetition
categorization
late positive potential
url http://journal.frontiersin.org/article/10.3389/fpsyg.2017.01001/full
work_keys_str_mv AT serenamastria emotionalpictureperceptionrepetitioneffectsinfreeviewingandduringanexplicitcategorizationtask
AT veraferrari emotionalpictureperceptionrepetitioneffectsinfreeviewingandduringanexplicitcategorizationtask
AT mauriziocodispoti emotionalpictureperceptionrepetitioneffectsinfreeviewingandduringanexplicitcategorizationtask