PSY 101 Lecture Notes - Lecture 10: Optic Disc, Inferior Colliculus, Absolute Threshold
Document Summary
Sensation: the process by organs in ears, eyes, mouth, skin, and other tissues receive ad detect stimuli. Perception: organization and interpretation of sensory stimuli by the brain. Psychophysics: study of the relationships between the physical characteristics (intensity) and psychological experience of them. Absolute threshold: the minimum amount of something needed to detect a stimulation 50% of time, change from nothing to something, jnd"s from nothing, if you can smell something very quickly= you have lower absolute threshold. Minimum difference between two stimuli required for detection 50% of the time, low something goes up to high something, vice versa. Weber"s law: jnds are proportional to size of original stimulus, 20-24, 80-96. Specific receptor cells for each sense stimulate neurons in the cns. Receptor cells transduce sensory input from the environment (sights, sounds, smells) Transduction: translation, conversion------- sights, sounds, smells are converted into aps (action potentials), transduction of light waves into action potentials. Rods and cones help convert the action potentials.
