“…Indeed, principles and criteria for selection and use of multiple outcome measures have been developed (MacKenzie & Dies, 1982;Pattison, 1965;Whiteley & Gordon, 1979). Most recently, there has been a growing trend within the group therapy field toward incorporating process and outcome measures in clinical studies and toward a more systematic evaluation of group therapy treatment (Budman et al, 1987;Dies, 1987;Silver et al, 1980Silver et al, , 1981.…”