PSYB51H3- Final Exam Guide - Comprehensive Notes for the exam ( 298 pages long!)
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Fourier analysis: mathematical procedure by which any signal can be separated into component sine waves at different frequencies. Combining these sine waves will reproduce the original signal. While sounds are described as changes in pressure across time, images can be described as changes in light and dark across space. Spatial frequency: number of cycles of a grating per unit of visual angle (usually specified in cycles per degree). Number of light/dark changes across 1 degree of a perso(cid:374)"s (cid:448)isual field. In vision the units of spatial frequency are cycles per degree of visual angle. Cycles per degree: number of pairs of dark and bright bars per degree of visual angle. Johannes muller formulated the doctrine of specific nerve energies, which says that we are aware only of the activity in our nerves, and we cannot be aware of the world itself. For this reason, what is most important is which nerves are stimulate, not how they are stimulated.
