title: Infant perception of the rotating Kanizsa square.
abstract: This study examined the perception of the rotating Kanizsa square by using a fixed-trial familiarization method. If the Kanizsa square is rotated across the pacmen, adult observers perceive not only a rotating illusory square, but also an illusory expansion/contraction motion of this square. The phenomenon is called a "rotational dynamic illusion". In experiments 1 and 2, we investigated whether infants perceived the rotational dynamic illusion, finding that 3-8-month-old infants perceived the rotational dynamic illusion as a simple rotation of the Kanizsa square. In experiment 3, we investigated whether infants perceived the rotational dynamic illusion as a rotation of the Kanizsa square or as a deformation of shape, finding that 3-4-month-old infants did perceive the rotational dynamic illusion as a rotation of the Kanizsa square. Our results show that while 3-8-month-old infants perceive the rotating Kanizsa square, however, it is difficult for the infants to extract expansion/contraction motion from the rotational dynamic illusion.
authors.affiliation: Nihon University, 4-4-8, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan. dyoshino@apple.email.ne.jp
authors.forename: Daisuke
authors.initials: D
authors.lastname: Yoshino
authors.forename: Masanori
authors.initials: M
authors.lastname: Idesawa
authors.forename: So
authors.initials: S
authors.lastname: Kanazawa
authors.forename: Masami K
authors.initials: MK
authors.lastname: Yamaguchi
mesh_terms: D002657:Child Development; D005133:Eye Movements; D005260:Female; D006801:Humans; D007088:Illusions; D007223:Infant; D008297:Male; D010775:Photic Stimulation; D012399:Rotation; D013997:Time Factors; D014796:Visual Perception