Heinrichs, N., Kliem, S., & Hahlweg, K. (2014). Four-year follow-up of a randomized controlled trial of Triple P group for parent and child outcomes. Prevention Science, 15(2), 233–245. Model(s): Triple P - Positive Parenting Program®—Variants suitable for home visiting Does not pass screens Home visiting is not a substantial element of the program Study reviewed under: Handbook of Procedures and Standards, Version 1