Background:
Group treatment is delivered in youth correctional facilities, yet groups may
be iatrogenic. Few measures with demonstrated psychometric properties exist to track
behaviors of individuals during groups. We assessed psychometrics for the Group
Process-Individual Level measure (GP-IL) of group treatment.
Methods:
N=152 teens were randomized to 1 of 2 groups (10 sessions
each). Adolescents, counselors, and observers rated teen behaviors at sessions 3 and 10.
GP-IL assesses reinforcement for deviancy and positive behaviors, member rejection, and
counselor connection and praise.
Results:
Internal consistency and 1-month stability were demonstrated. Concurrent
validity is supported by correlations with measures expected to be associated with group
behavior (e.g., coping skills). Counselors and observers rated more deviancy during
interactive skills-building groups versus didactic psycho-educational groups
(p≤ .005). Scales evidenced incremental validity.
Conclusions:
GP-IL offers a sound method of tracking adolescent behaviors for professionals
working with groups. Counselors ratings were most reliable and valid overall.