title: Recall of letters from the left and right visual half-fields under unilater and bilateral presentation.
abstract: Bilateral presentation in the visual half-field greatly increases superiority of the right visual half-field in tachistoscopic recognition of words when fixation is controlled using a center digit. Two experiments explored left-right asymmetry with bilateral presentation on a visual half-field short-term memory task, with fixation controlled by a sequence of letters at fixation. A total of 40 subjects served in the two experiments, which compared recall under unilateral versus bilateral presentation to the visual half-field. Bilateral presentation increased over-all recall from the last serial position but did not alter asymmetry of the visual half-field. As in previous experiments, the superiority of the right visual half-field was greatest from the initial serial positions. It was concluded that asymmetry of the visual half-field on this recall task with controlled fixation depends primarily on masking and short-term memory but is independent of unilateral-bilateral presentation.
mesh_terms: D004538:Eidetic Imagery; D005260:Female; D005403:Fixation, Ocular; D005556:Form Perception / Q000502:physiology*; D007839:Functional Laterality; D006801:Humans; D008297:Male; D008568:Memory; D011939:Mental Recall; D010470:Perceptual Masking; D012691:Serial Learning / Q000502:physiology; D014794:Visual Fields