PSYC 100 Lecture Notes - Lecture 9: Visual Cortex, Detection Theory, Basilar Membrane

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: Jordan Poppenk

Document Summary

Higher process that the brain uses to interpret organizes and selects sensaions, also involves personal knowledge and experience. Psychophysics: study of how sensaion relate to percepion done by psychophysicists. Sensory threshold : point which simulus triggers neural efect. Ernst weber sensiivity to weight change: weber"s law (created by fechner): Jndt divided by the iniial intensity is a constant, when jndt goes up as intensity goes up. Gustav fechner sensiivity to variaion of simuli. Fechner"s law: in every sensory domain each jnd is an equal step in the psychological magnitude of a sensaion. This law measures the magnitude of a sensaion in jnd. Steven"s power law: relaionship between the magnitude of a simuli and its perceived intensity. ^paricipants tendency to say yes or no when unsure: external noise and internal/neural noise (neuron iring at spontaneous, signal detecion theory: weather simulus is perceived depends on sensory experience and judgement.