PSY 102 Lecture Notes - Lecture 4: Reticular Formation, Optic Nerve, Visual Cortex
4 Sep 2018
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1. sensation: detection of physical energy by sense organs, which then send information to the brain. Physical process: the stimulation of our sense organs byfeatures of the outer world. 2. perception: the brain"s interpretation of raw sensory inputs. 3. transduction is the process by which the nervous system converts an external stimulus into electrical signals within neurons. 4. sense receptors: specialized cells responsible for converting external stimuli into neural activity for a specific sensory system. 5. psychophysics: the study of how we perceive sensory stimuli based on their physical characteristics. Absolute threshold: lowest level of a stimulus needed for the nervous system to detect a change 50 percent of a time (when no other stimuli of that type are present) Just noticeable difference: the smallest change in the intensity of a stimulus that we can detect stimulus input) between the jnd. An absolute threshold is simply the just noticeable difference from nothing (no.
