Practice Effect and Sensitivity in Reaction Time
نویسندگان
چکیده
We study the reaction time (RT) to the appearance of a stimulus composed of a sinusoidal grating of spatial frequency. Five subjects participated in the experiment: 3 young emmetropic subjects, an older presbyopic subject (with optic corrections) and an albino subject (M). The data show that the RT varies according to the product of contrast (C) by the period (P) of the gratings. The CxP is the relevant factor for the RT variation. With practice, the RT decreases. We found no interaction between the decreasing in the RT with practice and the relevant factor. While the decrease of RT with CxP is a receptoral treatment, its change with practice reflects a change in the decisional treatment.
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