Detection of scene-relative object movement and optic flow parsing across the adult lifespan.

作者: Lucy Evans , Rebecca A. Champion , Simon K. Rushton , Daniela Montaldi , Paul A. Warren

DOI: 10.1167/JOV.20.9.12

关键词:

摘要: Moving around safely relies critically on our ability to detect object movement. This is made difficult because retinal motion can arise from movement or own Here we investigate scene-relative using a neural mechanism called optic flow parsing. acts subtract caused by self-movement. Because older observers exhibit marked changes in visual processing, consider performance across broad age range (N = 30, range: 20-76 years). In Experiment 1 measured thresholds for reliably discriminating the direction of probe presented among three-dimensional objects moving onscreen simulate observer Performance this task did not correlate with age, suggesting that information preserved ageing. 2 investigated underlying parsing supports ability, well-established measures magnitude globally subtracted flow. We found strong evidence positive correlation between and global subtraction. These data suggest identify during self-movement ageing, but there are underpins ability. these reflect compensatory processing required counteract other impairments ageing system.

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