The factor structure of manic rating scales.

Separate factor analyses were performed on interview and ward behaviour ratings of 81 manically disturbed patients. The principal components analyses produced a dimensions of manic disturbance separating elation from aggressiveness. For the interview scale the rotated factors were (a) thought disturbance, (b) overactive and aggressive behaviour and (c) elevated mood and vegetative symptoms. For the ward behaviour scale the rotated factors were (a) motor and speech disturbance, (b) aggressiveness and (c) unrealistic expansiveness of mood.