Riku UMEKAWA, a “Travel Award” Winner in 2024, Receives “Best Student Presentation Award” at EPC & APCV Joint Meeting 2025

    Riku Umekawa, a second year in the Psychology Course of the Graduate School of Letters, received the Best Student Presentation Award at the EPC & APCV (The Australasian Experimental Psychology Conference and Asia Pacific Conference on Vision）Joint Meeting 2025, which was held from June 17th to 20th, 2025, in Sydney, Australia. This achievement follows his receipt of the “Travel Award” at the International Congress of Infant Studies (ICIS) held in Glasgow, Scotland, in July 2024, and it highlights Umekawa’s growing international presence in his field of expertise.

Details
Title: Event-related potentials (ERP) to implied motion in infants
Presenting Author: Riku Umekawa, Chuo University
Authors: Riku UMEKAWA : Chuo University, So KANAZAWA: Japan Women's University, K Masami YAMAGUCHI: Chuo University
Abstract:
In this study, we recorded ERPs evoked by the sight of implied motion and no-implied motion in infants. In adults, between 260 and 400 ms after stimulus onset, implied motion and real motion showed a response in the occipital lobe, but the real motion response was approximately 100 ms earlier than the implied motion response (Lorteije et al.,2006). Hirai and Hiraki (2005) measured 8-months’ activation of biological motion and they found that the activation for biological motion was greater than that for scramble motion in the occipitotemporal region. Our previous behavioral study (Umekawa et al., 2024) showed that 7-8 months but not 5-6 months adapted to implied motion even in infancy. We measured infants ERPs to implied motion in the occipitotemporal region same as biological motion study. This is because implied motion perception and biological motion perception share neural development (Shirai and Imura, 2014, 2016). Each trial started with the presentation of a blank during 1000ms. Then the animal running profile image as implied motion or standing profile image as a no-implied motion appeared for 500 ms followed by a 1500 ms blank. The images were selected pseudo-randomly. The experiment continued until the infant was no longer interested or after 100 trials (approximately 10 min). Adult preliminary data showed that negative peaks at around 200 (N200) were elicited during observing implied motion. About APCV（Asia Pacific Conference on Vision）

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