A previous study of therapist-assisted Internet-delivered cognitive behaviour therapy (ICBT) for generalized anxiety (Paxling et al., 2013) identified eight distinct therapist behaviours in ICBT (task reinforcement, self-efficacy shaping, task prompting, alliance bolstering, psychoeducation, empathetic utterances, deadline flexibility, and self-disclosure). It is unknown how generalizable these behaviours are across ICBT programs.