| Autor: |
Cosgrove, Mark, Schmidt, Marty, Fulgham, Dan, Brown, D. |
| Zdroj: |
Perception & Psychophysics; 1972, Vol. 11 Issue 6, p398-402, 5p |
| Abstrakt: |
Two studies report results of viewing lines in different orientations in stabilized Maxwellian view. The first study examined the time course of four dependent variables-whole- and partial-fade frequencies and whole- and partial-fade durations. Whole-fade frequencies increased systematically throughout 10 min of the 15-min viewing session and were sensitive to line orientations. Partial-fade frequencies increased for 3-5 min during which orientation specificity occurred. Thereafter, partial-fade rate was constant and pattern-specific effects disappeared. Mean fade duration, which increased throughout the 15-min session for whole fades but for only 5 min for partial fades, was not pattern-specific. The second study demonstrated that the pattern specificity of whole fades could not be accounted for in terms of time-dependent extraneous variables. It was concluded that partial and whole fades may reflect the operation of different visual processes. The complete fading of images was attributed to the operation of supraretinal pattern processing units. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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