Sensation and Perception Flashcards
What is sensation and perception based on?
It is based on our ability to transform sensory information into neural signals.
If you sense something you perceive it?
False
What is top down process?
Perception (which starts from the brain)
What is bottom down process?
Sensation
Prosopagnosia
The inability to recognize familiar faces. Also known as face blindness.
Which is impaired in prosopagnosia?
Perception
Absolute Threshold
(Psychosis): Can be detected 50% of the time. Smallest detectable level of stimulus
Subliminal Stimuli
Below your absolute threshold, not aware of it, but are able to evoke a response
Difference Threshold
Just noticeable difference. Difference that a person can detect btwn. any two stimuli 1/2 of the time
Sensory Adaption
If we are exposed to an unchanging stimulus, our nerve cells fire less often. (Ex. if you raise the volume by one bar, you would not recognize the change, bc it isn’t a significant change).
Perception Sets
Your experience is linked to the way you perceive things. (You create your own reality)
Context effects on perception
(Cognitive psychology): The influence of environmental factors on ones perception of a stimulus.
Stimulus
Something that causes a change or reaction
Rorschach ink bolt test
Projective test: Method of psychological evaluation based on the response.
Thematic Apperception Test (TAT)
Projective Test: one makes up a story with a beginning, middle and end based on the picture to evaluate a persons patters of thoughts, attitudes observational capacity and emotional responses.
