par Bourgaux, Laura 
;De Heering, Adélaïde
Référence CCPM: Cognitive Control and Performance Monitoring (29-31/05/2022: Carry-le-Rouet, France)
Publication Non publié, 2022
;De Heering, Adélaïde Référence CCPM: Cognitive Control and Performance Monitoring (29-31/05/2022: Carry-le-Rouet, France)
Publication Non publié, 2022
Poster de conférence
| Résumé : | Face-pareidolia is an illusory perception of a face in objects or patterns. It activates brain regions that are dedicated to the processing of faces (Rekow et al., 2022). This study aims at exploring how infants learn about their surroundings. We operationalize learning through the impact of visual context on how internal representations are shaped. Pareidolia is used because its ambiguous nature offers many ways to plasticity (Gosselin & Schyns, 2003). We also took advantage of the steady state evoked potentials (SS-EP) technique which is particularly suited to test infants because it allows for short and efficient recordings, has an excellent signal-to-noise ratio and is immune to most artifacts (Kabdebon et al., 2022). We conceived an interlaced SS-EP design that we first tested on 20 adults to ensure its applicability with infants. Participants were exposed to two blocks (B1 and B2) of 26 sequences of natural images presented at 6 Hz. Blocks were counterbalanced across participants and differed regarding the context pareidolia was presented in. Pareidolia was repeated every 5th stimulus (1.2 Hz) and faces (B1) or houses (B2) every 4th stimulus (1.5 Hz), which defined the learning context. In adults, pareidolia generated a strong bilateral occipito-temporal brain response, which was modulated by the learning context. In infants, we expect the brain response to be (1) weaker and to activate the right occipito-temporal cortex only (de Heering & Rossion, 2015), and (2) enhanced in the familiar context of faces rather than the unfamiliar one of houses (Rekow et al., 2021). |
