par Bourgaux, Laura 
;Rekow, Diane DR;Leleu, Arnaud AL;De Heering, Adélaïde
Référence PhD Day 2024 (ULB, Psychology) (26/04/2024: Brussels, Belgium)
Publication Non publié, 2024-04-26
;Rekow, Diane DR;Leleu, Arnaud AL;De Heering, Adélaïde Référence PhD Day 2024 (ULB, Psychology) (26/04/2024: Brussels, Belgium)
Publication Non publié, 2024-04-26
Poster de conférence
| Résumé : | Face pareidolia is the illusory perception of a face in facelike objects or patterns, as reflected by face-selective electroencephalographic (EEG) activity in both adults and infants. However, the perceptual interpretation of these facelike stimuli depends on the context in which they are presented, as we recently measured using a frequency-tagging approach in EEG in 20 adults. Participants were exposed to 40-second sequences of natural images presented at a rate of 6 images per second (6 Hz), with facelike stimuli inserted every 5th image (at 1.2 Hz, i.e., 48 instances per sequence), and face or house items inserted every 4th image (at 1.5 Hz), defining a face or nonface context, respectively. Our results indicate that facelike stimuli are processed more as faces when they are presented in a nonface than face context. In a complementary study, we aim to investigate how this difference translates to behavior. To do so, 50 participants will be tested on a task mimicking exactly the EEG experimental design, except that 4 to 8 facelike objects will appear randomly in every sequence. Participants will be asked to respond as precisely and as fast as possible whenever they notice a facelike object in the sequences. Consistently with our EEG study, we expect that accuracy and response times to detect facelike stimuli will depend on the visual context of presentation. We predict lower accuracy and longer response times to detect facelike objects in the face compared to the nonface context, likely due to genuine faces attracting attention in the former. |
