External and Internal Validity Considerations in Youth Effectiveness Trials: Lessons Learned from the COMET Study.
Amanda Jensen-DossGrace S WoodardZabin S PatelJill Ehrenreich-MayDavid RosenfieldGolda S GinsburgPublished in: Journal of clinical child and adolescent psychology : the official journal for the Society of Clinical Child and Adolescent Psychology, American Psychological Association, Division 53 (2023)
While this study was successful in recruiting a diverse and historically under-represented sample, difficulties in recruitment and retention raise questions about external validity and site differences present challenges to internal validity of study findings. Suggestions for future effectiveness studies, drawing from implementation science approaches, are discussed.