Purchase this article with an account.
Jingjie Li, Hao Wu, Badong Chen; Visual working memory affects the perception of ambiguous SFM (structure-from-motion) by enhance internally directed attention. Journal of Vision 2017;17(10):1217. doi: 10.1167/17.10.1217.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
Previous studies show that an unambiguous prior stimulus can cause an ambiguous stimulus to be perceived in the same way, which we usually call the perceptual memory. Holding the unambiguous stimulus in visual working memory could strengthen this effect. Here we hypothesize that the prior unambiguous SFM can evoke internally directed attention and affect the representation of the coming up ambiguous SFM, and holding it into visual working memory could enhance this effect. To test this hypothesis, we carry out two behavior experiments. In the first experiment, subjects are asked to watch a serial of unambiguous SFM-delay-ambiguous SFM with two tasks, one for attending only and one for holding the rotation speed of the unambiguous SFM into the working memory. This experiment shows that the working memory task could strengthen the perceptual memory of unambiguous SFM significantly (p< 0.01). In the second experiment, the subjects watch a serial of unambiguous SFM- delay- unambiguous SFM stimulus and perform an Stroop-like RT task. The rotation direction of the second SFM may be congruent or incongruent with the first SFM. The normalized difference of this contrast get larger when subjects performing a WM task (p< 0.01). Furthermore, we find that this RT difference can predict the perceptual memory performance in each task across subjects(r=0.48, p< 0.05), revealing a direct link between internally directed attention and the perception bias. Our results demonstrate that the working memory task could improve the perceptual memory performance via enhancing the internally directed attention, and the internally directed attention is strongly correlated with the perceptual memory phenomenon.
Meeting abstract presented at VSS 2017
This PDF is available to Subscribers Only