Masks reveal processing time for alignment across space

Research output: Contribution to journalArticlepeer-review


Does spatial separation incur a processing time requirement before precise alignment judgements can occur? Alignment thresholds for separated lines are measured for exposure durations from 27 to 500 ms, with and without post-masks. The effect of masks on visibility is controlled. Unlike without a post-mask, with an effective post-mask, alignment thresholds improve substantially with time, i.e. in square-root fashion. Alignment across space may be important for further shape analysis. Threshold improvement is probably not explained by a spatial scale shift of visual analysis over time. A higher-order collection stage appears to refine relative position information for up to 200 ms.

Original languageEnglish
Pages (from-to)2305-2313
Number of pages9
JournalVision Research
Issue number17
Early online date5 Jul 2007
Publication statusPublished - 1 Aug 2007
Externally publishedYes


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