Back to Resource Library Children's abilities to communicate with both parents in infancy were related to their social competence at the age of 15 Parkkinen, S., Makinen, M., Maki, P., Moilanen, I. · 2018 ★ NIFPlay Rating: 2 Rating Scale 10 Rigorous play-specific science 6–9 General biological science 5 Sound play research (uncontrolled) 1–4 Less rigorous / indirect 0 Indirect but high value Longitudinal Finnish study examining whether infant triadic communication with both parents predicts social competence in adolescence. View Resource