Smith, K.E., Landry, S.H. & Swank, P.R. (2005). The influence of decreased parental resources on the efficacy of a responsive parenting intervention. Journal of Consulting and Clinical Psychology, 73(4), pp. 711-720. Model(s): Play and Learning Strategies (PALS) Infant Not applicable (NA) - additional source Study reviewed under: Handbook of Procedures and Standards, Version 1