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17 Cards in this Set

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  • Back
Selective attention
the brain is bombarded with enormous amounts of stimuli,, which must be attended to or blocked out
Gestalt principles
1. nearness-stimuli which are near to each other tend to be grouped together

2. similarity-tendency towards simplicity

3. closure-tenency to cmplete, or fill in gaps

4. contiguity-nearness in time or space
Habituation
decreased perceptual response to a repeated stimulus
Hallucination
an imaginary sensation which does not exist in the external world.
Perceptual defense
resistance to perceiving threatening or diturbing stimuli. There is a natural resistance to stimuli which are unpleasant
Orientation response
bodily changes which prepare an organism to receive new information from a particular stimulus
Electromagnetic spectrum
the full range of electormagnetic wavelengths, including radio waves, light waves, x-rays, etc.
Perception
the mental process of organizing sensations into meaningful patterns
Subliminal perception
perception of a stimulus below the threshold for conscious recognition
Illusion
a misleading or ditorted perception
depth perception
the ability to see three-dimensional spaces and to accurately judge distances
Sensation
immediate response in the brain caused by the excitation of a sensory organ
Absolute threshold
the minimum amount of physical energy required to produce a sensation
Gestalt psychology
the study of thinking, learning, and perception in whole units. This was originally advanced by Max Wertheimer
Size-distance invariance
the direct relationship between the distance an object lies from the eye and the size of its image
Size, shape, and brightness constancy
the perceived size or shape of an object remains constant despite changes in the retinal image
Transducer
anything which converts one form of energy into another