Effector identity and orthogonal stimulus–response compatibility in blindness to response-compatible stimuli
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Perceiving a visual stimulus is hampered when the stimulus is compatible with simultaneously prepared or executed action (blindness effect). We explored the roles of the effector identity of the responding hand and of orthogonal compatibility (above-right/below-left correspondence) in the blindness effect. In Experiment 1, participants conducted bimanual key presses with vertically arranged responses while perceiving a brief presentation of rightward or leftward arrowheads. A blindness effect based on the effector identity did emerge, but only with the above-right/below-left key-hand arrangement. An orthogonal blindness effect was not found in Experiment 2 with a horizontal key-press action task and a vertical arrowhead perception task. We concluded that the anatomical identity of the responding hand was not integrated into the action plan with an orthogonally incompatible key-hand arrangement. The findings are discussed in terms of the generality and limits of the blindness effect, and hierarchical response coding.
KeywordsResponse Position Action Task Perceptual Task Incompatible Condition Blindness Effect
This study was supported by a grant from the Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists to AN, and by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science awarded to KY.
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