“…Hopf, Huber, & Weiß, 2008;Möller & Krahé, 2009) or no predictive relationship at all (e.g. Ferguson, San Miguel, Garza, & Jerabeck, 2012;von Salisch, Vogelgesang, Kristen, & Oppl, 2011) or potentially an inverse relationship (Shibuya, Sakamoto, Ihori, & Yukawa, 2008). These studies have varied in the sophistication of the use of control variables, the quality of aggression measures, and the degree to which issues such as single responder bias (Baumrind, Larzelere, & Cowan, 2002) may have influence results.…”