AOS 2 CHP 10 - Visual illusions + agnosia Flashcards
What is fallibility?
the quality of being prone to error or experiencing difficulties in judgement.
What is a visual illusion?
Why are they important?
Can you “unsee” them?
an illusion created by a misinterpretation of the reality of a visual stimulus - most ppl perceive them the same way.
demonstrate the important role our brain plays in constructing our view of the world.
no.
What is the Muller-Lyer illusion?
(2 points)
What are the names of the two explanations for the illusion?
the misinterpretation of two lines of equal length, each with different-shaped ends.
one line has arrowheads at each end of the line, while the other line has feathertails at each end.
the carpentered world hypothesis
the apparent distance theory
What is the carpentered world hypothesis?
two figures in The Müller-Lyer illusion represent three-dimensional objects viewed in our environment.
What is the apparent distance theory?
if two objects cast the same sized retinal image, but one is perceived to be further away, our brain interprets the more distant object as being larger.
Why are the two explanations for the illusion limited?
illusion persists even if the feathertail and arrowheads are replaced with differently shaped ends, and when the lines are turned on their side.
What is the ames room illusion?
specially constructed, trapezoid-shaped room, designed to create the visual illusion that it is rectangular, for an observer viewing the room through a peephole.
Explanation of the ames room illusion
observer can view room using only one eye at a time - prevents them from using binocular depth cues (convergence and retinal disparity).
What is agnosia?
brain disorder that interferes with one’s ability to recognise or identify objects, people or sounds using one or more of the senses, despite the affected sensory system being otherwise fully functioning.
2 Examples of visual agnosia?
- apperceptive agnosia
- associative agnosia
What is apperceptive agnosia
an inability to recognise familiar visual stimuli due to problems with processing perceptions (cannot recognise or name objects).
What is associative agnosia?
an inability to recognise familiar visual stimuli, despite having no problem with processing perceptions (can recognise object, not name it).
What is the condition of prosopagnosia?
an inability to recognise the face of familiar people - can be apperceptive or associative.
