Attention and Perception (Chapter 8) Flashcards
attention
is the process of focusing on specific stimuli whilst ignoring and therefore excluding others.
selective attention
focusing our mental resources on one stimulus at the exclusion of other stimuli.
divided attention
splitting attention across two or more stimuli at the same time.
sustained attention
also known as vigilance, involves maintaining a high degree of attention over a prolonged period.
bottom-up processing
perception is determined by incoming sensory info, moving from specific stimulus info to general knowledge.
top-down processing
perception is driven by prior knowledge and expectations, moving from general knowledge (schemas) to specific stimulus info.
what are the stages of perception?
selection
organisation
interpretation
what is selection
choosing relevant features
what is organisation
when selected features are regrouped
what is interpretation
when organised sensory info is understood and given meaning
schema
our pre-existing mental ideas relating to a given concept that helps us organise and interpret new info
salient
distinctive, prominent or important
perception
is the process by which we interpret and give meaning to sensory info.
visual perception
meaningfully interpreting visual stimuli
gestalt principles
a set of principles that allow us to organise and group separate visual stimuli into a meaningful whole.
what are the 4 gestalt principles?
figure-ground
closure
similarity
proximity
figure-ground
the tendency to perceive some figures as being at the front of an image (foreground) and others as falling into the background.
closure
tendency to mentally complete images that are otherwise incomplete.
similarity
the tendency to perceive parts of the visual image that have similar features as belonging together in one group, unit or ‘whole’
proximity
the tendency to group items in an image based on their physical closeness to one another
binocular depth cues
depth cues that rely on information from both eyes.
what are the two binocular depth cues?
retinal disparity and convergence
retinal disparity
refers to the difference or disparity between the different images received on the retina of either eye.