PSYC 2000 Chapter : Chapter 3 Psych Notes
Document Summary
The 5 sense organs: eyes, ears, nose, skin, taste buds. Thresholds: absolute threshold- minimum stimulation needed to detect a particular stimulus 50% of the time, difference threshold- the minimum difference between two stimuli required for detection. 50% of the time, also called just noticeable difference (jdn) 8/100=. 08: you can now predict the difference threshold needed for a light build of any other intensity value. Habituation: the tendency of the brain to stop attending to constant, unchanging information, the brain ignores stimuli that are being sensed, but do not change, example- ignoring an air-conditioning. Sensory adaptation: the tendency of sensory receptors to become less responsive to a stimulus that is unchanging, receptors less responsive to the stimulus, and therefore no longer send signal to the brain. Habituation and vision: microsaccades- constant movement of the eyes; tiny little vibrations that people do not notice consciously; prevents sensory adaptation to visual stimuli, rotating snakes due in part to eye movements.
