Psychology 1000 Study Guide - Visual Cortex, Visual Acuity, Afterimage

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: All

Document Summary

Sensation the stimulus-detection process by which our sense organs respond to and translate environmental stimuli into nerve impulses that are sent to the brain. Perception active process of organizing the stimulus input and giving it meaning. Stimulus detection absolute threshold designated as the lowest intensity at which a stimulus can be detected 50% of the time. Value for weights = 1/50, therefore if 50 lbs. is lifted, increased weight will only be detected at 51 lbs. Doesn"t apply to extremely high or low stimulation intensities. Sensory adaptation the diminishing sensitivity to an unchanging stimulus: perception of stimuli will decrease if constantly present. Photoreceptors: rods and cones: retina covered in light-sensitive receptor cells, rods black and white receptors. Function best in dim light: cones color receptors. Function best in bright light: in humans, rods are everywhere except fovea (direct center of retina)