Personne : Grondin, Simon
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Université Laval. École de psychologie
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- PublicationAccès libreSex effect in the temporal perception of faces expressing anger and shame(eScholarship, 2015-09-01) Grondin, Simon; Labonté, Katherine; Bienvenue, Philippe; Laflamme, Vincent; Roy, Mei-LiThe aim of the present study was to investigate sex-related variations in the perception of the duration of emotional stimuli (human faces). Twenty male and 20 female participants estimated the duration of angry, ashamed and neutral faces marking 0.4 to 1.6 s intervals. Female faces were used in one session, and male faces in the other. Compared to the angry faces condition, intervals were underestimated when ashamed faces were shown. However, the intervals in neither conditions were significantly overestimated or underestimated compared to the neutral condition. Even more critical is the fact that there was an underestimation by male participants of the duration of male faces compared to female faces; and female participants overestimated the duration in the anger condition, compared with the shame condition, only when male faces were presented. Moreover, the emotional effects on the participants’ performance were correlated to inter-individual differences in empathic abilities. The findings are discussed in terms of sex differences, of social context, and of how attention is solicited and arousal generated by emotions.
- PublicationRestreintEffect on perceived duration and sensitivity to time when observing disgusted faces and disgusting mutilation pictures(Springer Science & Business Media B.V., 2014-05-09) Grondin, Simon; Gontier, Émilie; Laflamme, VincentThe aim of this study was to compare the effect on interval discrimination of the presentation of disgusting mutilation images and the presentation of faces expressing disgust. In Experiments 1 and 2, participants had to say whether the second of two images was presented for a shorter or a longer duration than the first (intervals = 400 ms vs. 482 ms). Although the overall probability of responding “long” was not exactly the same in these two experiments, participants reported that duration was longer more often when disgusting mutilation images were presented than when neutral or disgusted faces were presented. In Experiment 3, in which a single-stimulus method was employed, mutilation images were once again reported to be presented for a longer duration than neutral or disgusted faces. The investigation also reveals that discrimination levels are not higher when mutilation images are presented. It is argued that the effect of mutilation images on perceived duration is not due to attention; it is rather attributed to the increased arousal caused by these images. -- Keywords : Temporal processing, Emotion, Time perception.
- PublicationRestreintThe delay before recall changes the remembered duration of 15-minute video sequences(John Wiley & Sons, Inc., 2014-07-09) Grondin, Simon; Bisson, Nicolas; Désautels, Félix; Laflamme, VincentThe aim of this study was to determine if the passage of time changes the memory of the duration of joyful or sad events. Participants were asked to look at a series of brief videos lasting 15¿minutes and to estimate retrospectively and verbally (with chronometric units) the duration of this 15-minute period. There were two independent variables: the emotion conditions (joy, sadness and neutral) and the recall conditions (immediately after the presentation of videos, 1¿week later or 1¿month later). The results show that the estimated time is largely overestimated in the 1-week and 1-month condition but not when the recall is immediate. This effect applies to each emotional condition, but there was no significant difference between the emotion conditions. The effect of emotion on the estimation of long intervals judged retrospectively seems minimal in comparison with the cognitive effect associated with the passage of time. --