“…It is possible that the inclusion of ecologically relevant synthesized reinforcers or the use of a variable, unpredictable schedule of reinforcement (or both) may have contributed to the efficacy of schedule thinning without supplemental procedures. Other studies evaluating skill-based treatment have reported large reductions in challenging behavior without the use of supplemental procedures as well (e.g., Fiani & Jessel, 2022;Jessel et al, 2018;Rajaraman, Hanley, Gover, Ruppel, et al, 2022;Rajaraman, Hanley, Gover, Staubitz, et al, 2022;Staubitz et al, 2022). However, the success of FCT without supplemental procedures has also been reported in large-n consecutive controlled case studies with a variety of other schedule-thinning methods.…”