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Facial frequency manipulation normalizes face discrimination in AD

From the Department of Psychology (Drs. A. Cronin-Golomb and Dunne, A.C. Brown, and K. Jain), Department of Psychology, Boston University; Electro-Optics Technology Center (Dr. M. Cronin-Golomb), Tufts University, Medford; the Departments of Anatomy and Neurobiology (Dr. Cipolloni), and Neurology (Drs. Cipolloni and Auerbach) Boston Medical Center; the Geriatric Research and Educational Clinical Center (Dr. Cipolloni), Edith Nourse Rogers Memorial Veterans Affairs Medical Center, Bedford, MA.

Address correspondence and reprint requests to Dr. A. Cronin-Golomb, Department of Psychology, Boston University, 64 Cummington St., Boston, MA 02215; e-mail: alicecg{at}bu.edu

People with AD have deficient contrast sensitivity and impaired face discrimination. The authors presented photographs of unfamiliar faces of three different sizes to enhance the low, middle, or high facial frequency information (cycles per face). Patients with AD demonstrated normal discrimination of small faces only, indicating that impaired contrast sensitivity at low facial frequencies contributes to their poor face discrimination.

Key words: AD—Vision—Face discrimination—Contrast sensitivity—Cognition—Perception.

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