Parent–Child Interaction Therapy (PCIT) is an intervention which focuses on children with disruptive behaviour problems and their caregivers [41]. PCIT consists of two phases of treatment, Child-Directed Interaction (CDI) and Parent-Directed Interaction (PDI). The first phase focuses on enhancing the parent–child relationship and the second on improving child compliance. Both treatment phases begin with a didactic parental teaching session followed by weekly sessions whereby the parent is coached by the therapist during play sessions with their child. The therapist provides the parent with feedback on their skills from an observation room behind a one-way mirror, via a bug-in-the-ear. Parents practice specific communication skills and behaviour management with their children. PCIT is customized per case and although it is often a short-term intervention, PCIT is not time-limited. In each session parent–child interactions are coded at the beginning to determine the family’s progress toward pre-established mastery criteria. Parents have to master the CDI criteria before starting with the PDI phase of treatment. The PDI phase continues until parents reach the mastery criteria for the PDI skills and rate their child’s behaviour well within a normal range. A consequence of this approach is that the number of sessions may vary among families. Nevertheless, each family receives the number of sessions necessary to master CDI and PDI skills in order to demote their child’s behaviour below clinical levels [34].