Unit 3 Review Flashcards
Process by which we detect physical energy from the environment and encode it as neural signals:
Sensation
Process by which the brain organizes and interprets sensory information:
Perception
Analysis begins with the sense receptors and works up to the brain’s integration of sensory information:
Bottom-Up Processing
Information processing guided by higher-level mental proecesses:
Top-Down Processing
Study of relationships between physical characteristics of stimuli and our psychological experience of them:
Psychophysics
Minimum stimulation needed to detect a stimulus 50% of the time:
Absolute Threshold
Explains precisely how and when we detect the presence of faint stimulus/signal:
Signal Detection Theory
One that is below the absolute threshold:
Subliminal Stimulus
Minimum difference between 2 stimuli that a subject can detect the difference between the two stimuli:
Difference Threshold
States that the just noticeable difference between 2 stimuli is a constant minimum percentage of the stimulus:
Weber’s Law
Decreased sensitivity that occurs with continued exposure to an unchanging stimulus:
Sensory Adaptation
Our perceptions of our sense depend on how focused we are on them:
Sensory Habituation
Asking people to identify the color of the word rather than read what the word says:
Stroop Effect
Process by which receptor cells in the eye, ear, skin, and nose convert environmental stimuli into neural impulse:
Transduction
The color we experience, comes in the basic colors of red, green. or blue:
Hue
Distance from one peak of one light/sound to the next; gives rise to the perceptual experiences of hue (color) and pitch (sound):
Wavelength
Determined by amplitude of waves; any sound that exceeds 85 decibels in amplitude/intensity will damage the auditory system:
Intensity
Transparent structure that covers the front of the eye:
Cornea
Adjustable opening in the eye through which light enters:
Pupil
Ring of muscle tissue that forms the colored part of the eye and controls the diameter of the pupil:
Iris
Transparent structure of the eye behind the pupil that changes shape to focus images on the retina:
Lens
Process by which the lens of the eye changes shape to focus near objects on the retina:
Accomodation
Light-sensitive, multilayer, inner surface of the eye that contains the rods and cones as well as neurons that form the beginning of the optic nerve:
Retina
The central point of focus in the retina around which the eye’s cones cluster:
Fovea
Retinal receptors that detect black, white, and grey; necessary for peripheral and twilight vision when the cones don’t respond:
Rods
Retinal receptors that are concentrated near the center of the retina and that function in daylight/well-lit conditions; detect fine detail and give rise to color sensations:
Cones
Carry neural impulses from eye to brain:
Optic Nerve
Place in the brain where the fibers from each optic nerve cross into the opposite side of the brain:
Optic Chiasm
Region of retina where optic nerves leaves the eye; no rods or cones are in this area = no vision:
Blind Spot
Reflexive, rapid movement from side to side that keeps neurons firing and helps to fill in missing information created by the blind spot:
Saccade
Sharpness of vision:
Acuity
Condition in which nearby objects are seen clearly but distance objects are blurred:
Nearsightedness
Condition in which distant objects are seen clearly but nearby objects are blurred:
Farsightedness
Located in visual cortex of the brain; nerve cells that selectively respond to specific visual features such as movement, shape, or angle:
Feature Detectors
Information processing in which several aspects of a stimulus are processed simultaneously:
Parallel Processing
Retina contains red, green, and blue-sensitive color receptors that can produce the perception of any color:
Young-Helmholtz Trichromatic Theory
Color vision depends on pairs of opposing retinal processes in the brain:
Opponent-Process Theory
Perception that familiar objects have consistent color despite changes in illumination that shift the wavelengths they reflect:
Color Constancy
Sense of hearing:
Audition
A sound that is determined by its frequency or number of complete wavelengths that can pass a point in time:
Pitch