Ch9 Flashcards
What is a visual illusion?
A misperception of visual stimuli that occurs due to the distortion when interpreting the stimuli.
What is the Müller-Lyer illusion?
The Müller-Lyer illusion is a visual illusion that tricks your eyes into thinking two parallel lines that have different ends (feather tails vs arrowheads) are of different length, whereas they are the exact same.
What is the Ames room illusion?
The Ames room illusion involves a trapezium-shaped room that is longer and higher on one side than the other. When viewed through a peephole at the front of the room using only one eye, the room appears rectangular. When putting two people in the room, one appears much taller than the other.
What is the Spinning Dancer illusion?
The Spinning Dancer illusion is a silhouette of a female dancer pirouetting around a vertical axis. This dancer can be perceived as either spinning clockwise or anti-clockwise.
What is agnosia?
The loss or impairment of the ability to recognise and identify objects, persons, sounds or other sensory stimuli using one or more of the senses despite otherwise normally functioning senses.
What are the different types of visual agnosia?
Prosopagnosia - inability to recognise familiar faces
Achromatopsia - inability to distinguish between colours
Simultanagnosia - inability to recognise multiple objects at the same time
Topographagnosia - inability to process spatial environments including familiar places
Agnosic Alexia (Pure Alexia) - inability to recognise and interpret written words
What causes agnosia?
Damage along neural pathways that connect areas that process perceptual information. This can be from a range of things, from a stroke to developmental disorders.
How can you treat agnosia?
There is no direct cure, however they will treat the underlying cause of it, whether that’s through surgery or radiation.
What is synaesthesia?
When the stimulation of one sense involuntarily stimulates another sense. (E.g. tasting sounds)
What is spatial neglect?
A neurological disorder where individuals are unable to notice anything either on their left or right side even though there may be no sensory loss. It is almost as if that side of the world does not exist.
What is gustatory perception?
