... play to the physicalactivity of primary school children. Prev Med 2010, 51:144-147.36. Puyau MR, Adolph AL, Vohra FA, Butte NF: Validation and calibration ofphysical activity monitors in children. ... derpinned by sociallydesirable responses. It is possible that this also explainswhy our findings for girls are different to previousresearch as girls may be more likely to provide sociallydesirable ... addition to emotional symptoms and hyperactivity [15-17]. Children s strengths and difficulties (i.e., a compositeof conduct problems, peer-problems, emotional symp-toms and hyperactivity subscales)...