Male and female mice differ for baseline and nicotine-induced event related potentials.

Temporal and brain topographic characteristics of the aesthetic judgment of male and female faces were investigated, using event-related potentials and reaction times. The evaluative aesthetic judgment of facial beauty (beautiful vs. not beautiful) was contrasted with a nonevaluative descriptive judgment of head shape (round vs. oval). Analysis showed longer reaction times in the descriptive than in the evaluative task, suggesting that the descriptive judgment demanded more cognitive effort and may entail greater uncertainty. Electrophysiologically, the evaluative judgment elicited a negativity (400 to 480 ms) for the judgment not beautiful, maximal over midline leads. A comparable deflection has been previously reported for evaluative judgments of graphic patterns. It was interpreted as an impression formation independent of the type of stimulus material, occurring when an aesthetic entity is judged intentionally. Besides this effect, which was independent of the gender of the face, the temporal characteristics of aesthetic evaluation differed depending on the gender of the face. We report a negativity for male faces only (280–440 ms) and a late positivity (520–1200 ms), which was stronger for female faces, both concerning not beautiful judgments. Thus, the evaluation of male and female facial beauty was processed in different time-windows. The descriptive judgment round elicited a larger posterior positivity compared with oval (320–620 ms). These results complement investigations of the architecture and time course of evaluative aesthetic and descriptive judgment processes, using faces as stimulus material.

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Facing stereotypes: ERP responses to male and female faces after gender-stereotyped statements

Social Cognitive and Affective Neuroscience ◽

10.1093/scan/nsaa117 ◽

2020 ◽

Vol 15 (9) ◽

pp. 928-940

Author(s):

Pablo Rodríguez-Gómez ◽

Verónica Romero-Ferreiro ◽

Miguel A Pozo ◽

José Antonio Hinojosa ◽

Eva M Moreno

Keyword(s):

Face Processing ◽

Time Windows ◽

Event Related Potentials ◽

Salient Feature ◽

Early Effect ◽

Male And Female ◽

Linear Mixed Effects ◽

Male Stereotypes ◽

Related Potentials ◽

The Impact

Abstract Despite gender is a salient feature in face recognition, the question of whether stereotyping modulates face processing remains unexplored. Event-related potentials from 40 participants (20 female) was recorded as male and female faces matched or mismatched previous gender-stereotyped statements and were compared with those elicited by faces preceded by gender-unbiased statements. We conducted linear mixed-effects models to account for possible random effects from both participants and the strength of the gender bias. The amplitude of the N170 to faces was larger following stereotyped relative to gender-unbiased statements in both male and female participants, although the effect was larger for males. This result reveals that stereotyping exerts an early effect in face processing and that the impact is higher in men. In later time windows, male faces after female-stereotyped statements elicited large late positivity potential (LPP) responses in both men and women, indicating that the violation of male stereotypes induces a post-perceptual reevaluation of a salient or conflicting event. Besides, the largest LPP amplitude in women was elicited when they encountered a female face after a female-stereotyped statement. The later result is discussed from the perspective of recent claims on the evolution of women self-identification with traditionally held female roles.

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