Caleb has good vision and can easily recognize common objects. However, he cannot recognize people by looking at their faces. For example, Caleb often relies on the sound of her voice to be certain he is talking to his wife and not another person

Caleb suffers from a rare disease called _______________.
A) retinal disparity
B) prosopagnosia
C) parallaxia
D) tactile agnosia

Answer: B
Rationale: Specific genetic problems or damage to this area can result in failure to recognize people's faces (a condition called prosopagnosia, or face blindness). People with face blindness are able to recognize voices and other defining features of individuals, but not faces.