Ch 8. Perception for Action

Question 1

Vision Affects Action

Answer 1

Time to process visual feedback
One of first researchers to study visual feedback systematically described an elegant series of simple experiments
-Kymograph Robert S. Woodworth (1869–1962)

Question 2

Visual feedback

Answer 2

Refers to visual information used to control an ongoing movement
Involves complex and precise coordination of incoming visual information with outflowing muscle commands

Question 3

optic array

Answer 3

structure created by surfaces, textures, and contours, which change as the observer moves through the environment

Question 4

Prism adaptation

Answer 4

Prism adaptation shows that people can compensate for changes in the correspondence between the apparent visual location of an object and what must be done with the arm and hand to reach for, point to, or direct a projectile toward it.
Adaptation involves at least two components
Change in visually perceived directions
Change in the felt position of the arm

Question 5

Visual processing in perihand space

Answer 5

Recent studies demonstrate that visual information processing about nearby objects is different when hands are near objects than when hands are far away from objects.
This difference facilitates potential actions (actions that could be performed if desired).

Question 6

Action-specific perception

Answer 6

Representations provided by perceptual system
Take action capabilities into account.
Capture the relationship between your environment and your abilities.

Question 7

backpack test

Answer 7

Participants in this experiment estimated the distance to objects placed on the ground in front of them while either wearing a heavy backpack or wearing no backpack.

As the distance increased, so too did the participants’ estimates, but participants wearing a backpack judged the distance to be greater.

Question 8

Lateral intraparietal area (LIP)

Answer 8

involved in the control of eye movements, including intended eye movements; an analogous region exists in the human brain

Question 9

Medial intraparietal area (MIP)

Answer 9

involved in planning reach movements

Question 10

Anterior intraparietal area (AIP)

Answer 10

involved in grasping movements.

Question 11

Bimodal neurons

Answer 11

Are sensitive not only to visual information from the space near the hand, but also to tactile stimulation of the hand
Are uniquely suited to support the execution of actions on nearby objects

Question 12

Hand-centered receptive field

Answer 12

visual receptive field of a neuron that responds to visual stimuli near the hand, based on the location of the stimulus relative to the hand, not on the retinal location stimulated