The effects of reduced non-verbal communication in Parkinson's disease

The first impressions formed by 19 senior speech therapy students shown silent video recordings of four patients with idiopathic Parkinson's disease (PD) & four with ischemic heart disease were measured using visual analogue scales directed at aspects of mood, personality, & intellect. Although both patient groups showed no abnormalities in terms of affect, personality, & intelligence by standardized psychological tests, the PD patients appeared more anxious, hostile, suspicious, depressed, bored, & tense than the controls; they seemed less intelligent, more introverted & passive, & looked as if they enjoyed & maintained their part of the conversation less well. They appeared to relate less well to the interviewer although there was no apparent difference in the interviewer's behavior to the two different disease groups. Overall they were rated as less likeable. The speech therapists' responses did not differ significantly from a previous study of other health professionals. The findings are related to the known effects of speech impairment on impression formation in Parkinson's disease & are discussed in relation to possible effects on therapeutic relationships & management of patients with impaired expressive behavior. 1 Table, 12 References. HA