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Clocks |
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This is a demo of the "clocks" procedure that my graduate student Hinze and I developed to measure the speed of attention. Try covertly tracking the red cue while fixating in the middle. Then, read the time off of the clocks. If you are interested, Hinze has matlab code for clocks on his website . Carlson, T. A., Hogendoorn, H., & Verstraten, F. A. (2006). The speed of visual attention: What time is it? Journal of Vision, 6 (12), 1406-1411. |
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Floating Square |
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This is an illusion I discovered in grad school. To be honest, we never really figured it out. If you figure it out, let me know. Our paper on the topic should get you started in the right direction. Carlson, T. A., Schrater, P., & He, S. (2006). Floating square illusion: Perceptual uncoupling of static and dynamic objects in motion. Journal of Vision, 6 (2), 132-144. |
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Dynamic Visual objects |
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The visual system can "interpret" this ambiguous stimulus as either a set of oscillating bars or a single diamond object moving behind occluders. The diamond percept can be facilitated by adding physical occluders to the stimulus (shown on the right) Lorenceau, J., & Shiffrar, M. (1992). The influence of terminators on motion integration across space. Vision Research, 32(2) , 263-273
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Motion induced blindness |
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I made this for fun while I was learning Flash. Fixate the center dot and watch those yellow dots fade in and out of "consciousness." Bonneh, Cooperman & Sagi (2001) Motion-induced blindness in normal observers. Nature 411:798-801 |
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Maryland Vision Science Lab
Department of Psychology | University of Maryland