The Family Task Interview (FTI) is a multiple task interview administered by tape recorder and designed to elicit clinically relevant family interaction. The FTI has been designed to improve on previous similar instruments and a series of studies to evaluate its validity, reliability, and acceptability have been carried out. Further psychometric and practical evaluation is necessary, but results so far suggest that the FTI is a well standardized and easily administered instrument which is useful for research where assessment of family interaction using direct observation is required.