De Haan & Campbell, and McConachie studies found that their patient AB has deficits in which domain?

• A. Face recognition (developmental prosopagnosia)
• B. Language production
• C. Memory recall
• D. Motor coordination

Answer: (A)

The key idea is that face recognition can be selectively impaired, showing a domain-specific deficit rather than a general cognitive problem. In these studies, patient AB shows a pronounced difficulty recognizing faces, yet other abilities are preserved. That pattern fits developmental prosopagnosia, a congenital impairment in face processing, indicating that recognizing faces relies on specialized neural systems separate from language production, memory recall, or motor coordination. Because AB’s language, memory for non-face material, and movement skills are intact, the deficit best points to a face-recognition impairment.