PSYC 2390 Study Guide - Midterm Guide: Spatial Frequency, Receptive Field, Afterimage

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Give one example of an after-image and one example of after-effect to clarify the distinction. An after effect is when something floats in front of your eyes or disappears as an. Describe 2 phenomena that are thought to be caused by lateral inhibition, and describe how lateral inhibition produces each of those effects. Side by side cells inhibit one another and this has the effect of highlighting edges of objects (from white to dark); we perceive an exaggeration. Compare the receptive fields of retinal ganglia with those of the photoreceptors. Receptive fields are areas on a retina which cells respond to; cells have either an on response or an off response and the collector cells and brain cells indicate whether the cell receives information. Receptive fields on cells can have an on or off response; on an on" response, cells have more action potentials per second and on off" responses cells have fewer action potentials: orientation and spatial frequency a).