PS102 Lecture Notes - Lecture 4: Detection Theory, Peripheral Vision, Optical Illusion
Document Summary
Shows how our perceptions are relative to the original intensity of the stimulus. Higher the intensity, more difficult to notice a change: fechner. When there are a lot of changes in a stimulus, we are more likely not to. Signal detection theory notice them all: how motivations and biases get in the way of perception, anorexic- does not feel hungry (cid:271)e(cid:272)ause they don(cid:859)t want to eat, someone pinches us- we say (cid:858)ow(cid:859) (cid:858)stop(cid:859) Words like (cid:858)interested(cid:859) (cid:858)willing(cid:859) (cid:858)desire(cid:859: non-motivational primes (cid:858)o(cid:271)ligated(cid:859) (cid:858)for(cid:272)ed(cid:859, students perform better if they are given motivational messages than non- motivational, can help those who are distracted perform better. Perception of a visual stimulus occurs in two places: retina & the brain. Trichromatic theory: colour combining, works in retina, colour blindness can be explained by this theory, optical illusions cannot be explained. Opponent process theory: suggests our ability to perceive colour is controlled by three receptor complexes with opposing actions, receptors.
