Anisotropic perception of slant from texture gradient: Size contrast hypothesis.

Atten Percept Psychophys · 2016 · PMC4744267 · PMID 26582439

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difference was apparentno p-value reported

Thus, in four cases, the ceiling patterns were here judged to be less slanted than the other patterns, and in the other cases, no significant difference was apparent among the directions of gradient.

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