000147890 001__ 147890
000147890 005__ 20180913055731.0
000147890 02470 $$2ISI$$a000263269900612
000147890 037__ $$aCONF
000147890 245__ $$aCrowding is modulated by global stimulus configuration
000147890 269__ $$a2008
000147890 260__ $$c2008
000147890 336__ $$aConference Papers
000147890 520__ $$aIn crowding, neighbouring elements impair the perception of a target. Crowding is often considered a consequence of spatial pooling of visual information. We investigated the role of configural effects in crowding by manipulating the global stimulus configuration while keeping constant the orientation, spatial frequency, and spatial phase of the elements making up the stimuli. We measured contrast and orientation discrimination thresholds for a peripheral Gabor target that was flanked on both sides by seven Gabor patches. When the target and the flanking Gabors were of equal length, discrimination performance was strongly impaired. However, when changing the stimulus configuration by (i) making the flanks either shorter or longer than the target or (ii) constructing each flank from two or three small Gabors, the impairment was largely reduced, even abolished. These results challenge simple pooling accounts of crowding. We suggest crowding is weak or absent whenever the target and flanks do not form a coherent texture, even when their 'low-level' properties are matched. A target that stands out avoids crowding.
000147890 700__ $$aSaarela, T. P.
000147890 700__ $$aSayim, B.
000147890 700__ $$aWestheimer, G.
000147890 700__ $$0243629$$aHerzog, Michael H.$$g164642
000147890 7112_ $$a31st European Conference on Visual Perception$$cUtrecht$$dAugust 24-28, 2008
000147890 773__ $$j37$$kSupplement$$q171$$tPerception
000147890 909C0 $$0252249$$pLPSY$$xU10987
000147890 909CO $$ooai:infoscience.tind.io:147890$$pconf$$pSV
000147890 937__ $$aEPFL-CONF-147890
000147890 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000147890 980__ $$aCONF