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Recall of letters from the left and right visual half fields under unilateral and bilateral presentation


, : Recall of letters from the left and right visual half fields under unilateral and bilateral presentation. Perceptual and Motor Skills 42(2): 531-539

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 [human] subjects served in the 2 experiments, which compared recall under unilateral vs. 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. 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.

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