“…This reveals that the home-based intervention as was implemented here prompted parents who are not the closest to the school culture to get involved. By contrast, some studies where the home-based intervention group were the families who had responded to an invitation or participated in training sessions have found that the home-based group was socio-economically more advantaged than the other groups (Farrell, 2014;Jalbert & Pagani, 2007;Niklas et al, 2016;Sonnenschein et al, 2016). Recruiting more advantaged families not only raises ethical but also methodological questions, since the socioeconomic index is a moderator of the intervention's effects (Dulay et al, 2018;Manz, Hughes, Barnabas, Bracaliello, & Ginsburg-Block, 2010).…”