sensation and perception Flashcards
sensation
conversion of physical stimuli into neurological signals
perception
processing of sensory info to make sense of its significance
what sensory receptors do
respond to stimuli and trigger electrical signals
what sensory neurons do
transmit info from sensory receptors to CNS
what first happens to sensory stimuli in relation to brain
transmitted to projection areas in brain, hwich further analyze sensory input
threshold
minimum stim that causes a change in signal tsduction
weber’s law
just-noticeable difference for stimulus is proportional to magnitude of stimulus, and this proportion is constant over most of the range of possible stimuli
signal detection theory studies
effects of nonsensory factors such as experiences, motives, and expectations, on perception of stimuli.
response bias examined using
signal detection experiments with 4 possible outcomes
adaptation
decrease in response to stimulus over time
visual pathway
from retina to optic nerve to optic chiasm to optic tracts to lateral geniculate nucleus of thalamus to visual radiations to visual cortex
what cochlea do
detect sound
what utricle and saccule do
detect linear acceleration
what semicircular canals do
detect rotational acceleration
auditory pathway
cochlea to vestibulochochlear nerve to medial geniculate nucelus of thalamus to auditory cortex
what the fuck is somatosensation
touch. four modalities: pressure, vibration, pain, temp
another word for proprioception
kinesthetic sense
kinesthetic sense
abiltiy to tell where the fuck one’s body is in space
bottom-up processing is also called
data driven
how bottom-up processing works
recognition of objects by parallel processing and feature detection. its slow, but makes less mistakes
top-down processing also called
conceptually-driven
how top-down processing works
recognition of object by memories and expectations with little attention to detail. faster, but more prone to mistakes
gestalt principles
ways the brain can infer missing parts of an image when its incomplete
