PSYC 1010 Chapter Notes - Chapter 4: Subliminal Stimuli, Limen, Basilar Membrane

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Myriam Mongrain

Document Summary

Signal detection theory detection of stimuli involves decision making process & sensory processes both influenced by variety of factors besides stimulus intensity. Replaces fechner"s sharp threshold with concept of detectability. Detectability measured in terms probability depends on decision making process and sensory processes ex) monitoring a radar screen, looking for signs of possible enemy aircraft. Mission is to detect signals that are represent airplanes approaching quickly and accurately possible. 4 possible outcomes: hits (detect signal when present) 3)false alarms (detecting signal when not present: correct rejections (detecting no signal when there no signal/absent) Subliminal perception tight up highly controversial topics relating money, sex, Subliminal stimuli has weak effects as disappear short period time. Gradual decline in sensitivity due to prolonged effect. Built in process keeps ppl tuned to changes rather than constant in sensory input. Allows you ignore what"s obvious and focus on any changes that may signal threat to safety. Likely behavioural adaptation sculpted by natural selection.