Moving Backgrounds Confer Age-Related Positional Uncertainty on Flash-Grab Targets
The flash-grab effect made a stationary flashing cross appear to jump back and forth through a distance of more than 2°. Observers were asked to move a cursor as quickly as possible on to this flashing target. All observers younger than 65 years, and 39% of those over 65 years, could do this without...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2019-09-01
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| Series: | i-Perception |
| Online Access: | https://doi.org/10.1177/2041669519879178 |
| Summary: | The flash-grab effect made a stationary flashing cross appear to jump back and forth through a distance of more than 2°. Observers were asked to move a cursor as quickly as possible on to this flashing target. All observers younger than 65 years, and 39% of those over 65 years, could do this without difficulty within 1 second to 2 seconds. But 61% of those over 65 years experienced uncertainty about the exact position of the target and took from 6 to 147 seconds to hit it—about 4 times longer than to hit an actually jumping cross. This loss of hand–eye coordination was probably perceptual, not motor. |
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| ISSN: | 2041-6695 |