“…Regarding the informants, eight studies used the mother as the sole source of information (Anhalt et al, 2007;Barker & Maughan, 2009;Boyd & Tervo-Clemmens, 2013;Gerkensmeyer, Perkins, Day, et al, 2011;Gerkensmeyer, Perkins, Scott, et al, 2008;Goosby, 2007;Mickelson & Demmings, 2009;Zanca et al, 2013), and 13 studies did not specify the mothers' depression status at the time of data collection (Barker et al, 2012;Barker & Maughan, 2009;Brown et al, 2013;Criss et al, 2009;Dubois-Comtois et al, 2013;Goosby, 2007;Hart et al, 2008;Heberle et al, 2014;Karevold et al, 2009;Lau et al, 2007;Lengua et al, 2008;Piché et al, 2011;Wang et al, 2013). Because depressive symptoms may affect the quality of mothers' reports, implying a potential methodological problem that limits the validity of the information provided, 18 studies employed multiple respondents including not only mothers but also children, fathers, and teachers, which increased the validity of the findings.…”