Question

Astrid holds a pencil quite close to her nose and then opens and closes her first her left eye and then her right eye a couple of times in succession. She notices that the images she sees from each eye are quite different. When she views the same pencil in a similar manner from across the room, she sees almost identical images. Astrid has just demonstrated the _____ cue of _____.

Answer 1

Astrid demonstrated the binocular disparity cue of depth perception, which decreases as the object moves farther away.

Step-by-step explanation:

Astrid has just demonstrated the binocular disparity cue of depth perception. When Astrid holds a pencil close to her nose and alternates opening and closing each eye, she experiences a visual effect where the pencil seems to shift position. This is due to the slightly different view each eye has of the pencil, known as binocular disparity, which is the basis for our binocular depth perception. As she moves the pencil farther away, these shifts become less noticeable because the disparity between the two images seen by each eye reduces. To summarize, when nearby, the binocular disparity is more prominent, but it lessens with distance, which tells the brain about the object's depth, aiding in forming a three-dimensional understanding of the space around us.

Answer 2

binocular; binocular disparity

Step-by-step explanation:

Astrid holds a pencil quite close to her nose and then opens and closes her first her left eye and then her right eye a couple of times in succession. She notices that the images she sees from each eye are quite different. When she views the same pencil in a similar manner from across the room, she sees almost identical images. Astrid has just demonstrated the binocular cue of binocular disparity.