PS260 Lecture Notes - Lecture 3: Visual Search, Word Superiority Effect, Ganglion
Document Summary
Evidence for feature detectors (confusions, visual search, physiological) About patterns, philosophers and psychologists have been strangely silent; yet most interesting phenomena are almost certainty patterned. Of course, this silence is really not at all strange, for patterns are amazing complicated things to come to grips with. Computer template matching: cheques and bar codes. Problems: normalizing patterns (need infinite number of templates, or knowledge of how to normalize pattern) Theory of pattern recognition in which patterns are analyzed in terms of their component parts or features. Assumes that the visual system can detect or idneitify different features. Subjects searched for different letters or words in lists of letters of words. Search more difficult when target letter shares features with non-target letters in search set. Ea(cid:396)(cid:272)h faste(cid:396) (cid:449)he(cid:374) (cid:271)ased o(cid:374) physi(cid:272)al featu(cid:396)es (cid:894)(cid:862)sa(cid:374)d(cid:863)(cid:895) tha(cid:374) o(cid:374) se(cid:373)a(cid:374)ti(cid:272) featu(cid:396)es (cid:894)(cid:862)la(cid:373)(cid:271)(cid:863)(cid:895) Easier to find an incomplete circle against a background of complete circles. Harder to find a complete circle against a background of incomplete circles.
