Terms : Hide Images
| 68916482 | sensation | stimulation of the senses | |
| 68916483 | perception | organizing and interpreting sensory information | |
| 68916484 | psychophysics | study of relationships btw physical characteristics of stimuli and our experience of them | |
| 68916485 | absolute threshold | lowest level of stimulation that a person can detect | |
| 68922329 | difference threshold | smallest change in stimulation that a person can detect (aka just noticeable difference) | |
| 68922330 | weber's law | the stronger the stimulus the greater the change must be in order for it to be noticed | |
| 68922331 | signal detection theory | theory that a person's experience, expectations, motivation, and level of fatigue influnce thresholds | |
| 68922332 | pupil | adjustable opening in the center of the eye through which light enters | |
| 68922333 | lens | transparent structure behind the pupil; bends and focuses light rays on the retina | |
| 68922334 | retina | the layer of rods and cones that lines the back of the eye | |
| 68922335 | optic nerve | carries neural impulses from the eye to the brain. | |
| 68922336 | fovea | small depression in the retina; mostly cones; clearest vision | |
| 68922337 | blind spot | where the optic nerve leaves the eye, no rods or cones | |
| 68922338 | frequency | number of waves per second | |
| 68922339 | amplitude | height of a wave | |
| 68922340 | cones | color receptors | |
| 68922341 | rods | receptors that detect black, white, and gray | |
| 68922342 | hue | shade of color; determined by the wavelength of light | |
| 68922343 | nearsightedness | image focused in front of retina; see close objects clearly; distant objects less clear | |
| 68922344 | farsightedness | image focused behind retina; see far objects clearly; close objects less clear | |
| 68922345 | night blindness | decreased ability to see in reduced light; impaired rod function; deficiency of vitamin A | |
| 68922346 | colorblindness | inability to dintinguish colors; defiency or absence of cones | |
| 68923003 | afterimage | visual image that persists after a stimulus is removed | |
| 68923004 | binocular fusion | process of combining the images received from the two eyes into a single image | |
| 68923005 | retinal disparity | depth cue; compare images from the two eyes; brain computes distance; greater the difference btw the two images, the closer the object | |
| 68923006 | auditory nerve | nerve that carries impulses from the inner ear to the brain | |
| 68923007 | pitch | highness or lowness of a tone; frequency | |
| 69138621 | hertz | unit of frequency, pitch | |
| 69138622 | decibels | measurement of intensity or loudness, amplitude | |
| 69138623 | cochlea | a snail-shaped tube; inner ear; lined with receptor cells; sound | |
| 69138624 | middle ear | chamber btw the eardrum and cochlea; hammer, anvil, and stirrup; concentrate the vibrations of the eardrum on the | |
| 69138625 | inner ear | innermost part of the ear; cochlea, semicircular canals, and vestibular sacs; relay sound waves to the auditory nerve fibers | |
| 69138626 | opponent process theory | color vision is derived from three pairs of opposing receptors; blue and yellow, red and green, and black and white. | |
| 69138627 | place theory | in hearing, pitch liked with the place where the cochlea's membrane is stimulated | |
| 69138628 | frequency matching theory | firing rate of a neuron matches the frequency of a sound wave to determine pitch | |
| 69138629 | vestibular system | three semicircular canals; sense of balance, in the inner ear; connected to the brain by a nerve | |
| 69138630 | olfactory nerve | carries impulses from olfactory receptors in the nose to the brain | |
| 69138631 | gustation | taste | |
| 69138632 | flavor | Experience of taste, smell, temperature,texture | |
| 69138633 | kinesthesis | system for sensing the position and movement of individual body parts | |
| 69138634 | figure ground | organization of visual field into objects (figures) that stand out from their surroundings (ground) | |
| 69138635 | visual cliff | laboratory device for testing depth perception in infants and young animals | |
| 69138636 | gestalt | the human eye sees objects in their entirety before perceiving their individual parts | |
| 69138637 | subliminal messages | brief auditory or visual messages that are presented below the absolute threshold | |
| 69138638 | illusions | perception does not accurately represent the world | |
| 98135628 | gustav fechner | father of psychophysics, built on the work of Weber, refined principles of perception. | |
| 98135629 | ernst weber | pioneered study of Just Noticeable Difference, which became Weber's law. JND is proportional to size of the stimulus. | |
| 98135630 | david hubel | w/Torsten Wiesel discovered feature detector groups of neurons;in visual cortex, respond to different types of visual images |
