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Unit 4
Sensation and Perception
15
Psychology
12th Grade
10/24/2013

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Term
sensation
Definition
the process by which our sensory receptors and nervous system receive stimulus from the eviorment, taking things in through senses
Term
perception
Definition
how your brain process's/ interprets that information
Term
bottom up processing
Definition
you take things in through your senses and goes up to your brain
Term
top down processing
Definition
prior knowledge and expectations
Term
absolute threshold
Definition
minimim stimulation needed to detect a particular stimuli
-50% of the time
Term
difference threshold
Definition
the moment when you SEE the different minimum stimuli
Term
subliminal threshold
Definition
just below your absolute threshold
Term
webers law
Definition
to perceive a difference between two stimuli they must differ from a constant percentage
Term
selective attention
Definition
the focus of consciousness awareness on a particular stimuli
Term
cocktail party effect
Definition
ability to listen to one voice among many, despite distractions
Term
in attentional blindness
Definition
failing to see visible objects because our attention is focused on somewhere else
Term
change blindness
Definition
a form of inattention blindness in which 2/3 people failed to notice a change in the person giving directions
Term
transduction
Definition
is the process of converting physical energy into electrochemical codes to travel to the brain
Term
signal detection theory
Definition
assumes that there is no absolute threshold and detection depends on : personal experience, expect ion, level of fatigue and motivation
Term
sensory adaptation
Definition
diminished sensitivity as a consequence of a constant simulation
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