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Shifts in perceived size as a function of contrast and temporal modulation
Vision Research
|January 1, 1983
Summary
Perceived size is influenced by how different size-detecting mechanisms respond. Manipulating luminance contrast and temporal presentation significantly shifts size perception, indicating multiple factors are at play.
Area of Science:
- Visual perception
- Neuroscience
- Psychophysics
Background:
- Perceived size is theorized to depend on the response distribution of localized, size-tuned neural mechanisms.
- Manipulations affecting this distribution are expected to alter perceived size.
Purpose of the Study:
- To investigate the impact of luminance contrast and temporal presentation on perceived size.
- To determine the factors contributing to the size percept.
Main Methods:
- Studied the effects of varying luminance contrast on size perception.
- Examined the influence of different modes of temporal presentation on size perception.
Main Results:
- Both luminance contrast and temporal presentation significantly altered perceived size.
- Evidence suggests multiple factors contribute to the size percept.
Conclusions:
- Perceived size is influenced by both the local distribution of size-tuned mechanism responses (for small/intermediate patterns) and the spatial distribution of these responses (for wide patterns).
- This indicates a complex interplay of neural processing in determining visual size perception.