PSY 101 Lecture Notes - Lecture 5: Presbyopia, Hair Cell, Analgesic
Document Summary
Brains must receive, convert and adapt the info into meaningful representations to meanings. Sensation= process of detecting, converting, and transmitting raw sensory info from external and internal environments to brain. Perception= process of selecting, organizing, and interpreting sensory info into meaningful patterns. Sensations: receptor cells in sense organs detect appropriate stimuli, convert stimuli(transduction) into neural impulses (action potential, transmit message to brain thru differentiate physical stimuli (coding, brain assigns meaningful sensory information. Some brain structure purposely reduces some sensory info they receive (feeling clothes, breathing, etc. ) Allows us to focus on the important things. Consciously aware of only a narrow range of stimuli at one time. Field of psychophysics studies link between physical stimuli and psychological experience. Difference threshold: minimal difference in stimuli strength that is detectable 50% of the time. (ernst. Absolute threshold: min. stimulation needed to consciously detect stimulus 50% of the time.
