L33 Psych 100B Chapter Notes - Chapter 5: Detection Theory, Sensory Neuron, Color Vision
Document Summary
Sensation the detection of external stimuli and the transmission of this information to the brain. Perception the processing, organization, and interpretation of sensory signals. Bottom-up processing perception based on the physical features of the stimulus. Top-down processing how knowledge, expectations, or past experiences shape the interpretation of sensory information. Sensory coding our sensory systems translate the physical properties of stimuli into patterns of neural impulses. Transduction the process by which sensory stimuli are converted to signals the brain can interpret. Sensory receptors specialized cells in the sense organs. Qualitative information consists of the most basic qualities of a stimulus. Quantitative information consists of the degree, or magnitude, of qualities. Psychophysics examines our psychological experiences of physical stimuli. Absolute threshold the minimum intensity of stimulation that must occur before you experience a sensation. Difference threshold (just noticeable difference) the minimum amount of change required for a person to detect a difference between two stimuli.
