Motivational incentives modulate age differences in visual perception |
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Authors: | Spaniol Julia Voss Andreas Bowen Holly J Grady Cheryl L |
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Institution: | Department of Psychology, Ryerson University, Toronto, Ontario, Canada. jspaniol@psych.ryerson.ca |
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Abstract: | This study examined whether motivational incentives modulate age-related perceptual deficits. Younger and older adults performed a perceptual discrimination task in which bicolored stimuli had to be classified according to their dominating color. The valent color was associated with either a positive or negative payoff, whereas the neutral color was not associated with a payoff. Effects of incentives on perceptual efficiency and response bias were estimated using the diffusion model (Ratcliff, 1978). Perception of neutral stimuli showed age-related decline, whereas perception of valent stimuli, both positive and negative, showed no age difference. This finding is interpreted in terms of preserved top-down control over the allocation of perceptual processing resources in healthy aging. |
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