Fallibility of visual perception (Illusions & agnosia)

Question 1

What is the carpentered-world hypothesis?

Answer 1

A psychological explanation for why we perceive center lines of the muller-lyre illusion to be different, suggesting that we automatically apply the lines to 3d objects
-can be influenced by culture

Question 2

What is the muller-lyre illusion?

Answer 2

Two lines that look like different lengths because arrows on each that either go inward or outward
<——>
>——<

Question 3

What is the ames room?

Answer 3

A tapezoid-shaped room designed to create an illusion through a peephole using monocular depth cues (Looks like a normal room, however if people stand on different sides of the room their size changes)
-Shape consistency is maintained
-Size consistency fails

• Reinforced by top-down processing if the individual is from a country where rectangular rooms are expected.

Question 4

What is Apperceptive agnosia?

Answer 4

The difficulty in perceiving visual information despite the intact mental understanding of what objects look like
- Inability to identify objects is caused by difficulty in perceiving form or visual elements
- Connected the parietal and occipital lobe
- Unable to draw or copy a drawing of the stimuli and unable to name

Question 5

What is associative agnosia?

Answer 5

The ability to process and perceive certain stimuli and draw or copy but not name drawn stimulus.
- Lesions in the temporal lobe
- Able to translate perception into recognition
- Cannot link previous experience to objects