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Introduction to Cognitive Psychology - Department of Psychological ...

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Pr<strong>of</strong>. Greg Francis 1/5/11Brightness contrastHermann gridPurdue UniversityPurdue University!! Seems related <strong>to</strong> on-center,<strong>of</strong>f-surround cells!! Cells at intersections receivemore inhibition than cells atsingle roadsHermann gridFilling-in!! We see color and brightness inside objects!! so edge information must fill-in <strong>to</strong> the interior!! It sometimes gets things messed up!! Water color effect!! How do we explain the otherversion?Purdue UniversityPurdue University!! Brightnessinformationspreads acrosssurfaces!!Craik-O’Brien-CornsweeteffectFilling-in!! Carefully fixatethe pink center!! If you keep youreyes very still, itwill disappear!! The yellow fills-in!Filling-inPurdue UniversityPurdue UniversityPSY 200: Intro. <strong>to</strong> <strong>Cognitive</strong> <strong>Psychology</strong> 3

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