title: Electrophysiological correlates of motion extrapolation: An investigation on the CNV.
abstract: Motion extrapolation (ME), the ability to estimate the current position of moving objects hidden by an occluder, is critical to interact with a dynamic environment. In a typical paradigm, participants estimate time to contact (TTC) by pressing a button when they estimate the occluded moving target reaches a certain cue. Research using this paradigm has shown that motion adaptation of the occluded area produces a shift in the TTC estimate (Gilden et al., 1995). We examined the effect of motion adaptation on the contingent negative variation (CNV), a frontal electrophysiological component (Tecce, 1972) that could reflect the activity of an accumulator (Buhusi and Meck, 2005) for time processing. We predicted that longer TTC estimates due to previous visual motion adaptation would result in a larger CNV because the accumulator can collect more time units. Results showed that motion adaptation actually modulates the CNV, but the CNV amplitude did not correlate with TTC duration, falsifying the accumulator hypothesis. We suggest that motion adaptation interferes with the remembered speed (stored during the visible part of the trajectory) that may be used as input by higher cognitive function to guide the temporal update of target position, regardless of the TTC estimate.
authors.affiliation: Department of General Psychology, University of Padova, Italy. Electronic address: luca.battaglini@unipd.it.
authors.forename: Luca
authors.initials: L
authors.lastname: Battaglini
authors.affiliation: Department of General Psychology, University of Padova, Italy.
authors.forename: Clara
authors.initials: C
authors.lastname: Casco
authors.affiliation: School of Psychology, Cognition Institute, University of Plymouth, Plymouth, UK; School of Psychology, University of Amsterdam, Netherlands; School of Psychology, University of Maastricht, Netherlands.
authors.forename: Bethany Rose
authors.initials: BR
authors.lastname: Isaacs
authors.affiliation: School of Psychology, Cognition Institute, University of Plymouth, Plymouth, UK.
authors.forename: David
authors.initials: D
authors.lastname: Bridges
authors.affiliation: School of Psychology, Cognition Institute, University of Plymouth, Plymouth, UK; Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, USA.
authors.forename: Giorgio
authors.initials: G
authors.lastname: Ganis
mesh_terms: D000223:Adaptation, Psychological / Q000502:physiology*; D000293:Adolescent; D000328:Adult; D001921:Brain / Q000502:physiology*; D003265:Contingent Negative Variation / Q000502:physiology*; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D009483:Neuropsychological Tests; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time; D013998:Time Perception / Q000502:physiology; D055815:Young Adult
keywords: CNV; Motion extrapolation; Time to contact