visual perception Flashcards
what is sensation vs perception
sensation is the intake of information via receptors whereas perception is the interpretation and understanding of sensations
what are the gestalt laws
that humans perceive objects as organised patterns
law of pragnanz
the notion that we perceive complex images in the simplest form possible
what are the 4 laws
similarity
proximity
closure
good continuation
what is the law of similarity
we group similar shapes together
what is the law of proximity
more likely to be grouped together to perceive one shape
what is the law of closure
complete a shape tendency
what is the law of good continuation
we assume the continuity even though there are gaps
evidence in support of gestaltism
navon 1977
what is bottom up processing
stimuli from external environment
data driven processing
what is top down processing
existing knowledge, top down processing
top down/bottom up
vecera and farah 1997
vecera and farah 1997
top down/bottom up
vecera and farah 1997
study
is the x’s on same or different objects?
are p’s faster when the letters are upright or inverted?
top down info is used when the letters are upright but cannot be used when letters are inverted
what are the 4 goals of depth perception
mather 2004
establish depth order of visible surfaces
estimate depth intervals between surfaces
estimate absolute distance of surfaces and objects
estimate 3D surface geometry
