CAS PS 101 Study Guide - Quiz Guide: Sensory Neuron, Psychophysics, Visual Cortex

• School: Boston University
• Department: Psychological & Brain Sciences
• Course: CAS PS 101
• Professor: Joseph Harris

Document Summary

Sensation and perception: psychophysics (relationship between physical characteristics of stimuli and our perception of those stimuli, key terms. Special cells unique to each sensory organ. Physical energy is converted to a neural signal. Absolute the smallest, weakest, least intense stimulus that is detected 50% of the time. Difference smallest change that is detected 50% of the time ( just noticeable difference ) The jnd increases as the stimulus intensity increases. No change in stimulus or sensory organs, despite a change in our response. A decrease in the perception of continuous, unchanging stimuli. Detection not only depends on signal characteristics, such as intensity and dynamics. Internal variables e. g. , stress, fatigue, expections / conditioning. Sensation example: the visual system: visual stimuli & machinery. Brightness (intensity), hue (color), saturation (colorfulness: white is unsaturated) retina, rods (peripheral and dim) and cones (color) lateral geniculate thalamus and primary visual cortex. Perception example: the visual system: visual processing and interpretation.