title: Typical object velocity influences motion extrapolation.
abstract: Previous work indicates that extrapolation of object motion during occlusion is affected by the velocity of the immediately preceding trial. Here we ask whether longer-term velocity representations can also influence motion extrapolation. Red, blue or green targets disappeared behind an occluder. Participants pressed a button when they thought the target had reached the other side. Red targets were slower (10-20 deg/s), blue targets moved at medium velocities (14-26 deg/s) and green targets were faster (20-30 deg/s). We compared responses on a subset of red and green trials which always travelled at 20 deg/s. Although trial velocities were identical, participants responded as if the green targets moved faster (M = 22.64 deg/s) then the red targets (M = 19.72 deg/s). This indicates that motion extrapolation is affected by longer-term information about the typical velocity of different categories of stimuli.
authors.affiliation: School of Psychological Sciences, University of Manchester, Manchester, UK.
authors.forename: Alexis D J
authors.initials: AD
authors.lastname: Makin
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Stewart
authors.forename: Ellen
authors.initials: E
authors.lastname: Poliakoff
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D003071:Cognition; D005260:Female; D006801:Humans; D008297:Male; D009039:Motion Perception; D013647:Task Performance and Analysis; D055815:Young Adult