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Just chapter 4
sensation vs perception
21
Psychology
Undergraduate 1
10/08/2010

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Term
sensation
Definition
detection of physical energy by sense organs which then sends information to the brain
Term
perception
Definition
the brain's interpretation of raw sensory inputs
Term
transduction
Definition
the process of converting an external energy or substance into neural activity
Term
sense receptor
Definition
specialized cell responsible for converting external stimuli into neural activity for a specific sensory system
Term
sensory adaptation
Definition
specialized cell responsible for converting external stimuli into neural activity for a specific sensory system
Term
absolute threshold
Definition
lowest level of stimulus needed for the nervous system to detect a stimulus 50% of the time
Term
just noticeable difference (JND)
Definition
the smallest change in the intensity of a stimulus that we can detect
Term
bottom-up processing
Definition
constructing a mental understanding of a stimulus by putting together the raw sensory information into a complete whole
Term
top-down
Definition
constructing a mental understanding of a stimulus using our existing knowledge and expectations
Term
perceptual set
Definition
the influence that expectations have on perception
Term
selective attention
Definition
process of selecting on sensory channel and ignoring or minimizing others
Term
Weber's law
Definition
the stronger the stimulus, the bigger the change needed for a change in stimulus intensity to be noticed
Term
vision sense
Definition
photoreceptors in the retina of the eye
Term
hearing sense
Definition
hair cells in the cochlea
Term
gustation/taste sense
Definition
taste buds
Term
alfaction/smell sense
Definition
olfactory cilia in upper part of the nasal passage
Term
touch sense receptor
Definition
multiple types of receptors in skin
Term
proprioception or kinesthetic sense
Definition
our sense of body position
Term
vestibular sense
Definition
our sense of equilibrium or balance
Term
rods
Definition
receptors cells in the retina allowing us to see in low light
Term
cones
Definition
receptor cells in the retina that allow us to see color
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