The study addressed the following research questions: 1) Does the PSF intervention increase parents' use of praise, questions, positive following, and positive touch? 2) Does the PSF intervention decrease parents' use of commands, negative talk, and negative touch? 3) Does the PSF intervention decrease observed and parent-reported challenging behavior in children and increase parent-reported child social skills? 4) Do parents who have more stress make fewer gains in positive parenting strategies? 5) Are parents' in the intervention group satisfied with the PSF intervention? (author abstract)