Abstract:
:'Preattentive' vision is typically considered to include several low-level processes, including the perception of depth from binocular disparity and motion parallax. However, doubt was cast on this model when it was shown that a secondary attentional task can modulate the motion aftereffect (Chaudhuri, 1990 Nature 344 60-62). Here we investigate whether attention can also affect the depth aftereffect (Blakemore and Julesz, 1971 Science 171 286-288). Subjects adapted to stationary or moving random-dot patterns segmented into depth planes while attention was manipulated with a secondary task (character processing at parametrically varied rates). We found that the duration of the depth aftereffect can be affected by attentional manipulations, and both its duration and that of the motion aftereffect varied with the difficulty of the secondary task. The results are discussed in the context of dynamic feedback models of vision, and support the penetrability of low-level sensory processes by attentional mechanisms.
journal_name
Perceptionjournal_title
Perceptionauthors
Rose D,Bradshaw MF,Hibbard PBdoi
10.1068/p3324keywords:
subject
Has Abstractpub_date
2003-01-01 00:00:00pages
635-40issue
5eissn
0301-0066issn
1468-4233journal_volume
32pub_type
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