Akeelah extended her arm in front of her and then extended one of her fingers. She focused on that finger. Next, she closed her left eye without moving her head; then she opened her left eye and closed her right eye without moving her head. She noticed that her finger seemed to shift as she alternated between the two eyes because of the slightly different view each eye had of her finger. What is illustrated by this example?
A) binocular disparity
B) bottom-up processing
C) oculomotor convergence
D) top-down processing

Question

Quizplus · Accepted Answer

Binocular disparity refers to the difference in image location of an object seen by the left and right eyes, resulting from the eyes’ horizontal separation. The brain uses this disparity to gauge the relative distance of objects, which contributes to our perception of depth. Akeelah's observation of her finger appearing to shift position when viewed alternately with each eye is a direct demonstration of binocular disparity.

Akeelah Extended Her Arm in Front of Her and Then