title: Grasping remaps the distribution of visuospatial attention and enhances competing action activation.
abstract: We examined how action goals influence the distribution of visuospatial attention near the body (Experiment 1) and how the temporal relationship between distractors and targets modifies shifts in visuospatial attention (Experiment 2). Targets were light emitting diodes (LEDs) in the left and right hemispace of a visual display. Following left or right target illumination, participants reached to point-to or grasp target object in blocked trials. Coincident with target onset, a distractor LED illuminated in the same or opposite hemispace between the initiation point and target, or no distractor appeared. In Experiment 1, during grasping there was a larger temporal interference effect (slower reach initiation) than with pointing. When grasping versus pointing, participants deviated more towards same-side distractors and away from opposite-side distractors. In Experiment 2, distractors onset 200ms prior to (-200-ms), coincident with (0 ms), or 200ms following (+200 ms) the target. For both reach types, -200-ms distractors had greater onset temporal interference than 0 ms and +200-ms distractors. For grasping, +200 ms distractors had larger temporal interference than 0 ms distractors. For -200-ms, reach trajectories deviated more towards opposite-side distractors and away from same-side distractors, the reverse of the pattern for 0 ms and +200-ms distractors.
authors.affiliation: a School of Psychology, Faculty of Health and Behavioural Science , University of Queensland, St Lucia , QLD , Australia.
authors.forename: Hayley
authors.initials: H
authors.lastname: Colman
authors.affiliation: a School of Psychology, Faculty of Health and Behavioural Science , University of Queensland, St Lucia , QLD , Australia.
authors.forename: Roger
authors.initials: R
authors.lastname: Remington
authors.affiliation: a School of Psychology, Faculty of Health and Behavioural Science , University of Queensland, St Lucia , QLD , Australia.
authors.forename: Ada
authors.initials: A
authors.lastname: Kritikos
mesh_terms: D000704:Analysis of Variance; D001288:Attention / Q000502:physiology*; D001696:Biomechanical Phenomena; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D018737:Hand Strength; D006801:Humans; D008297:Male; D010775:Photic Stimulation; D011597:Psychomotor Performance / Q000502:physiology*; D016059:Range of Motion, Articular; D011930:Reaction Time / Q000502:physiology; D013028:Space Perception / Q000502:physiology*; D013997:Time Factors; D013998:Time Perception; D055815:Young Adult
keywords: Action activation; Competing action; Grasping; Pointing; Reference frames; Visuospatial attention