000			01048nab a2200229 4500
003			OSt
005			20220804112937.0
007			cr aa aaaaa
008			220804b |||||||| |||| 00| 0 eng d
100			_a Anstis, Stuart _951105
245			_aMisperceived Luminance Gradients in an Hourglass Illusion
260			_bsage _c2019
300			_aVol 48, Issue 8, 2019 : (752-756 p.)
520			_aA square contains a linear luminance gradient from white at the top to black at the bottom. Pinching this in at the waist forms an hourglass figure of two tip-to-tip triangles. The pinch reduces the perceptual gradient within each triangle, making the pale upper triangle and the dark lower triangle both look more uniform in brightness We attribute this to undersampling of the mid-greys.
650			_aluminance, _951106
650			_agradient, _951107
650			_ablur, _951108
650			_aillusion _950584
773	0		_012374 _916462 _dSage, _tPerception _x1468-4233
856			_uhttps://doi.org/10.1177/0301006619857642
942			_2ddc _cART
999			_c12720 _d12720