Motor preparation of manual aiming at a visual target manipulated in size, luminance contrast, and location

Perception
Masami Ishihara, Kuniyasu Imanaka

Abstract

We conducted two experiments to investigate whether the motor preparation of manual aiming to a visual target is affected by either the physical characteristics (size or luminance contrast) or spatial characteristics (location) of the target. Reaction time (RT) of both finger lifting (ie stimulus-detection time) and manual aiming (ie movement-triggering time) to the onset of the target was measured. The difference of RT (DRT) between two tasks (ie the difference of task complexity) was examined to clarify the temporal characteristics of manual aiming per se during visuomotor integration. Results show classical characteristics: RT decreased as either the target size or luminance contrast increased. Furthermore, the task-complexity and target-location factors significantly interacted with each other, where the aiming RT was longer than the finger-lifting RT and the effects of target location on RT differed for each task. However, the task factor did not interact with either the size or luminance-contrast factor, implying that the motor preparation of manual aiming is associated with the spatial characteristics rather than the physical characteristics of the target. Inspection of DRT revealed that the time needed for motor prepara...Continue Reading

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Citations

Feb 25, 2011·Experimental Brain Research·Johanna ReuschelKatja Fiehler
Oct 18, 2011·Acta Psychologica·Marco FabbriVincenzo Natale
Apr 21, 2018·Laterality·Paula Cristina Dos Santos RodriguesMaria Olga Fernandes Vasconcelos

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