PSYCH 100 Lecture Notes - Lecture 16: Absolute Threshold, Cornea, Retina
Document Summary
Psych 100 lecture 16 sensation and vision. Sense organs: organs that receive stimuli (eyes, ears, nose, mouth, skin) Sensory receptor cells: specialized cells within the sense organs that send neural impulses to the brain. Absolute threshold: the smallest magnitude of a stimulus that can be detected (the weakest detectable stimulus) Difference threshold: the smallest detectable difference between two stimuli. Sensory adaption: the perceived weakening of a sensation due to a prolonged exposure to the stimulus. Light is composed to waves that give us: hue: wavelength of light gives us color, brightness: intensity of light, saturation: complexity of light (gives us pure versus paler colors) Iris: the colored part of the eye that regulates the amount of light that enters. Cornea: protective coating on the surface of the eye. Retina: images fall here, sensory receptor cells are here. Lens: the transparent portion of the eye that focuses light onto the retina.
