“…Twelve studies evaluated the effects of antecedent (e.g., repeating vs. not repeating the discriminative stimulus at each prompting step; Humphreys, Polick, Howk, Thaxton, & Ivancic, 2013) or consequence (e.g., token reinforcement vs. natural contingencies; Mason, Davis, & Andrews, 2015) manipulations during intraverbal training, as well as the outcomes of different instructional formats in the acquisition of intraverbal responses (e.g., blocked trials; Haggar, Ingvarsson, & Braun, 2017). Haq et al (2015) compared intraverbal acquisition of massed and distributed trials in three children with ASD. During massed trials, the experimenter conducted all training opportunities 1 day during each week; during distributed trials, the experimenter conducted all training opportunities across several days during the week.…”