PSY100Y5 Lecture Notes - Lecture 4: Headache, Observational Learning, Autonomic Nervous System

• School: UTM
• Department: Psychology
• Course: PSY100Y5
• Professor: Dax Urbszat

Document Summary

Sensation is the stimulation of sense organs. Perception is the selection, organization, and interpretation of sensory input. Sensory receptors are tuned to a particular form of energy: auditory reception is the ear code for sound pressure changes, not for light. Sensory system require a minimum amount of energy for activation (absolute threshold: just noticeable difference (jnd) The minimum difference in stimulation that is just noticeable. Weber noted that the jnd is a fraction of the original stimulus intensity: the fraction is different for different senses. The eye detects em radiation (light: vision is functional. Allows for detection of movement (predator or prey?) Allows for detection of color (ripe or spoiled?) Light detection is useful because: light travels rapidly (no delay, unlike hearing, light travels in straight lines (no distortion, light interacts with the surfaces of objects in the environment (is reflected or absorbed)