PSC 1 Lecture Notes - Lecture 8: Binocular Disparity, Sensory Threshold, Sound Localization
Document Summary
Sensation detection and transmission of sensory info to the brain. Perception processing and interpretation of sensations. Results in a conscious experience of the world. Synesthesia rare condition in which people experience cross modal sensations: shows imperfect correspondence between different senses. Transduction sensory stimuli transformed by sensory receptors into neural impulses that the brain can interpret: sensation detected, stimulus then transduced into chemical and electrical signals, brain interprets these signals to form mental picture. Processing info is bidirectional: bottom up, top down processing based on past experiences. If a stimulus is presented continuously, the sensory response will diminish over time: habituation. Impaired as people age and lens becomes stiff: presbyopia. Ishihara test tests for colorblindness, one type of cone is missing or has the wrong color sensitivity. Sound pressure waves: amplitude loudness. Height of sound wave: frequency pitch. Number of oscillations within a period of time: vibrations recorded by eardrum, ossicles (3 small bones), cochlea.
