PSYC 101 Lecture Notes - Lecture 21: Detection Theory, Crossmodal, Sensory System
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PSYC 101 Full Course Notes
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Sensation: the physical energy by sense organs, which then send information to the brain. Illusion: perception in which the way we perceive a stimulus doesn"t match its physical reality. Perception: the brain"s interpretation of raw sensory inputs. Transduction: going from the outside world to within. Transduction is the process by which the nervous system converts an external stimulus into electrical signals within neurons. A specific type of sense receptor: (specialized cell responsible for converting external stimuli into neural activity for a specific sensory system) transduces a specific stimulus. For all our senses, activation is highest when we first detect a stimulus. After that, a process called sensory adaptation occurs. Psychophysics: the study of how we perceive sensory stimuli based on their physical characteristics. Absolute threshold: the lowest level of a stimulus we can detect 50% of the time. On a clear night, our visual systems can detect a single candle from.
