“…In Europe and elsewhere, a range of programs aimed at preventing radicalization have now been designed and implemented (Bovenkerk, Van Hemert, & Quint, ; Lub, ; see also the Radicalisation Awareness Network, 2014, for an overview). However, studies testing the effectiveness of these programs are rare due to practical constraints or they do not meet scientific standards (Lindekilde, ; Lub, ; Marret, Feddes, Mann, Doosje, & Griffioen‐Young, ; Wijn, ). To increase knowledge about underlying socio‐psychological mechanisms involved in radicalization and to examine effectiveness of counter radicalization programs, it is crucial to conduct effectiveness research, for the sake of both theoretical advancement and practical implications (see also Bovenkerk et al, ; Vermeulen & Bovenkerk, ).…”