Habituation of alpha attenuation responeses in depressed patients and normal subjects.

Habituation of alpha attenuation responses (AAR) obtained from a group of 20 depressed patients was compared with a group of 20 matched normal controls. The slope of the AAR habituation curve over trial showed that the normals habituated much quickly than those of patients. The findings were interpreted in terms of the level of arousal of the patients/subjects tested.