“…Moreover, from a technical standpoint, there is growing interest in developing evidence‐based intervention programmes (James, ; James, Alemi, & Zepeda, ; Pecora & English, ). Although it is very difficult to carry out efficacy studies—because they tend to be performed with very small samples, amongst other reasons—results indicate some factors associated with the efficacy of the intervention, such as being based on a defined theoretical model, with defined phases that include the family, and relatively short placements, among other aspects (Whittaker et al, , ).…”