“…Hence, although sibling aggression is likely to be the most prevalent form of family violence (e.g., Eriksen & Jensen, 2006 , 2009 ; Finkelhor, Turner, & Ormrod, 2006 ; Straus & Gelles, 1986 ), a substantial proportion of those experiencing it being injured ( Khan & Cooke, 2013 ; Reese-Weber, 2008 ), and a range of weapons being used to threaten or attack siblings, including knives, broken glass, and guns ( Kiselica & Morrill-Richards, 2007 ), this behavior has received much less research attention than other forms of familial aggression ( DeKeseredy & Ellis, 1997 ; Wiehe, 1997 ). This is surprising given that weapon use against siblings has been reported not only in clinical and forensic populations who might be deemed at higher risk for violence ( Kuay et al, 2016 ; Tompsett, Mahoney, & Lackey, 2018 ) but also in lower-risk community and student populations ( Khan, 2017 ) and extreme sibling aggression also occurs ( Salmon & Hehman, 2014 ).…”