Evaluating the Group Triple P intervention

Business people talking at group meeting, photo by Igor Mojzes/Adobe Stock

Igor Mojzes/Adobe Stock


Triple P – Positive Parenting Program® is a suite of interventions widely used in many countries, including the UK, to tackle a number of child, parent and family outcomes by improving parenting skills.

Triple P encompasses a range of interventions of varying intensity. The current study will focus on the Group Triple P intervention, which is listed as a Level 4 out of 5 for intensity (with Level 5 being the most intensive). Groups of up to 12 parents participate in eight weekly sessions delivered by a trained and supervised qualified practitioner. The sessions include five two-hour group meetings and three individual telephone consultations 15-30 minutes long. Parents are introduced to 17 different strategies for improving their children’s competencies and discouraging unwanted child behaviour.

While the majority of research on Triple P has so far focused on child behaviour outcomes, the programme is also expected to enhance children’s language development. This project offers an opportunity to identify the specific effects of Triple P on language outcomes, particularly expressive language skills. It will be aimed at parents of three- to four-year-old children with language and behaviour difficulties.


RAND Europe was commissioned by the Education Endowment Foundation (EEF) to carry out an evaluation of the Group Triple P intervention in early years settings. The main research question for the evaluation will be How does the intervention influence expressive language skills in children whose parents are randomly assigned to the intervention?

The evaluation will also explore intervention impacts on child behaviour. In addition, the study will examine how the programme was implemented by the early years setting staff, trained by Triple P UK, and how the families experienced the programme.


The project team is conducting a cluster-randomised controlled trial in around 150 early years settings in England, with settings being assigned to either treatment (Triple P) or control (business as usual), with 10-12 families in each setting. The primary outcome measure will be pupil language skills.

Further details can be found on the Education Endowment Foundation project page.