PSYC 2000 Chapter : Chapter 3
Document Summary
Sensation and perception: to represent the world, we must detect physical energy (stimuli) from the environment and convert it into neural signals, a process called sensation. Transduction: taste (gustation): food, vision: light (photons, hearing (audition, touch (somatosensation): pressure and temperature. 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 signals to the brain. Sensation: the process by which information from the outside world enters the brain. Saturation (purity): determined by whether or how much there is a mixture of wavelengths. Intensity: amount of energy in a wave determined by amplitude; related to perceived brightness: higher amplitude= brighter color. Parts of the eye: cornea: transparent tissue where light enters the eye. Iris: muscle that expands and contracts to change the size of opening (pupil) for light. Fovea: central point in the retina, around which the eye"s cones cluster.
