Reliability and Validity of a Short Version of the General Functioning Subscale of the McMaster Family Assessment Device

The General Functioning 12‐item subscale ( GF 12) of The McMaster Family Assessment Device ( FAD ) has been validated as a single index measure to assess family functioning. This study reports on the reliability and validity of using only the six positive items from the General Functioning subscale ( GF 6+). Existing data from two Western Australian studies, the Raine Study ( RS ) and the Western Australian Child Health Survey ( WACHS ), was...