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Sunday, August 10, 2014

Age-related declines

Declining intelligence in old age linked to visual processing speed
August 7, 2014

The inspection time task. Participants focus on a cue, and are then shown one of the two possible stimuli, which is backward-masked after a brief exposure duration. The participant then indicates whether the longer line was on the right or left side of the stimulus (L/R; correct responses marked with an asterisk). Responses are not timed; only their correctness is measured. (Credit: Stuart J. Ritchie et al./Current Biology) Age-related declines in intelligence are strongly related to declines on a very simple task of visual perception speed, researchers report in Cell Press journal Current Biology (open access) on August 4. The evidence comes from experiments in which researchers showed 600 healthy older people very brief flashes of one of two shapes on a screen … more…
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