PSYCH 240 Lecture Notes - Lecture 2: Psych, Subjective Constancy, Retina
Document Summary
Introduction to perception: three stages of perception, major phenomena. Theories of perception: direct vs. constructivist, bottom-up v. top-down. Example: depth perception: problem, cues used to compute depth. Perception is the means by which information acquired from the environment via the sense organs is transformed into experiences of objects, events, sounds, tastes, etc. Distal stimulus: seen at a distance, what is in the environment, the pattern of perception/stimulation on sensors. Proximal stimulus: signals you get on sensors, the first ones. Lack of correspondence: when the distal stimulus does not translate to the percept i. e. pe(cid:396)(cid:272)eptual illusio(cid:374)s: thi(cid:374)gs a(cid:396)e(cid:374)"t (cid:449)hat the(cid:455) see(cid:373); (cid:373)i(cid:374)d (cid:272)o(cid:374)st(cid:396)u(cid:272)ts so(cid:373)ethi(cid:374)g diffe(cid:396)e(cid:374)t than what is there. Perceptual constancy: ou(cid:396) pe(cid:396)(cid:272)eptio(cid:374) of a(cid:374) o(cid:271)je(cid:272)t"s featu(cid:396)es (cid:396)e(cid:373)ai(cid:374)s (cid:272)o(cid:374)sta(cid:374)t e(cid:448)e(cid:374) (cid:449)he(cid:374) viewpoint and proximal stimulus changes. Size constancy: pattern is larger on the retina, but the actual figure is not changing size, image growing on proximal stimulus, but perceived as same size.
