“…Studies in Spain (Arbach‐Lucioni, Martinez‐García, & Andrés‐Pueyo, ) and Taiwan (Kuo, Cuvelier, & Huang, ) reported similar US average rates of prisoner‐to‐prisoner physical violence (8%), but the Taiwan study showed a much higher rate of prisoner‐to‐prisoner psychological violence (21%). According to two studies based on records from a single Swiss prison, 28% of prisoners said they had been victims of prisoner‐to‐prisoner physical violence, 26% had been subject to verbal violence, and 15% had taken illegal drugs during their incarceration (Endrass, Rossegger, Frischknecht, Noll, & Urbaniok, ; Endrass, Rossegger, Urbaniok, Laubacher, & Vetter, ). More recently, a 1‐year survey of a Swiss pre‐sentencing prison found that 30% of inmates had reported being victims of prisoner‐to‐prisoner physical violence (Pont et al, ).…”