sensation and perception Flashcards
sensation
perception of a physical stimuli, transmitted to the brain
perception
the further organisation and interpertation of sensory information in the brain
bottom up processing
physical propeties of the stimuli
top down processing
how exisiting knowledge and expectation influence the interpertation
Transduction
the sensory system translates stimuli into patterns of neural impulses (sensory coding) The sesory receptors recieve a physical or chemical stimuli and transmit impulses to the brain, most pass through the thalamus
qualitative
the basic propeties of the stimuli
quantitative
the intesity of the stimuli
absolute threshold
the minimume intesity of a stimuli before being detected
difference threshold
the smallest differnce between two stimuli that can be precieved
signal recognition theory
either you feel something or you dont
sensory adaptation
is the reduction of sesitivity to a constant level of stimuli
synesthesia
combined experience, like taste and colour
cornea (eye)
light enters the eye though here
pupil
narrow opening in the front of the eye, contraction and dilation of the pupil determins how much light gets in
iris
determins the colour of the eye and regulates the size of the pupil
accommodation (eye)
when the lens is flattened it focuses on a distant object and thickens when focusing on a close object
retina
where an image is formed, in the back of the eye
rods
darkness and no colour
cones
lightness and color