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Seeing Shapes and Perceiving Objects

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Questions and Answers

What is the primary factor in object perception?

Color

Texture

Motion

Shape (correct)

What is the process by which simple features such as lines are combined into edges, corners, and intersections, and then grouped into parts and objects?

Hierarchical representation (correct)

Color encoding

Texture analysis

Motion detection

What enables us to recognize differences between a triangle and a square, or between a chimp and a person?

Texture

Motion

Shape encoding (correct)

Color

Which brain area is most active when viewing familiar objects compared to scrambled stimuli?

The occipitotemporal cortex (C) Signup and view all the answers

What is the difference between a pentagon and a pyramid in terms of shape encoding?

A pentagon has five corners that define an enclosed region while a pyramid has a more complicated shape that implies it is three-dimensional. (A) Signup and view all the answers

What is the purpose of comparing responses to novel objects and scrambled stimuli in the PET study?

To identify areas involved in object perception (B) Signup and view all the answers

Which of the following is true about shape encoding?

Shape encoding involves hierarchical representations in which each successive stage adds complexity. (A) Signup and view all the answers

What is the difference between the pentagon and the pyramid in terms of shape encoding?

The pentagon contains five line segments of equal length and five corners that define an enclosed region, while the pyramid has only four points of intersection and the lines define a more complicated shape that implies it is three-dimensional. (B) Signup and view all the answers

What is the purpose of the PET study mentioned in the text?

To identify areas of the brain that are active when we compare contours that form a recognizable shape versus contours that are just squiggles. (B) Signup and view all the answers