PSYC-104 Lecture Notes - Lecture 4: Anne Treisman, Subliminal Stimuli, Donald Broadbent
26 Feb 2016
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Document Summary
Illusion: perception in which the way we perceive a stimulus doesn"t match its physical reality. Sensation: detection of physical energy by sense organs (eyes, ears, skin, nose, and tongue) which then send info to the brain. Perception: the brain"s interpretation of raw sensory inputs. Sensation allows us to pick up the signals in our environments, and perception allows us to assemble these signals into something meaningful. Transduction: the process by which the nervous system converts an external stimulus like light or sound, into electrical signals within neurons. Sense receptor: specialized cell responsible for converting external stimuli into neural activity for a specific sensory system. Sensory adaptation: activation is greatest when a stimulus is first detected. Psychophysics (gustav fechner): the study of how we perceive sensory stimuli based on their physical characteristics. Psychophysicists study phenomena like the absolute threshold, the lowest level of stimuli we can detect on 50% of the trials when no other stimuli of that type are present.
