Stimulus frequency influences spontaneous perceptual reversals in ambiguous apparent motion

Rüdigger Ilg, Stefan Burazanis, Afra M. Wohlschläger, Andreas Wöller, Stefan Wagenpfeil, Mark Mühlau

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The temporal integration of continuous sensory information into a temporally extended percept becomes evident in spontaneous reversals of ambiguous apparent motion. To study the temporal relation of spontaneous percept reversals and temporal stimulus properties, we systematically varied presentation frequency in an ambiguous-apparent-motion paradigm. Moreover, we triggered percept reversals in a manner that was not consciously perceived by manipulating the duration of single frames. We found that the reversal rate depended on the stimulus frequency (with higher frequencies resulting in faster percept reversals) and that we could externally trigger perceptual reversals. Our findings support the idea that spontaneous reversals of ambiguous apparent motion are influenced by bottom-up effects at early processing levels. The paradigm allows for specific contrasts of spontaneous and externally triggered (but otherwise identical) perceptual reversals and, by this means, for further study of the underlying mechanisms.

Original languageEnglish
Pages (from-to)437-442
Number of pages6
JournalPerception & Psychophysics
Volume70
Issue number3
DOIs
StatePublished - Apr 2008

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