“…Regardless, researchers should look at how the number of teaching phases impacts gains in efficiency and the outcomes of this study may not apply to single-phase teaching, such is the case with error correction-only studies (e.g., see Cariveau, La Cruz Montilla, et al, 2019) or trial-based most-to-least prompting whereby fading intrusive prompts is conducted based on consecutive trials rather than session-based criteria (Cengher et al, 2016). Additionally, it is not clear if results would be replicated with different types of target responses (e.g., tacts), a different performance-criterion level (e.g., 80% or 100% accuracy), or learners at different developmental levels (Fienup & Carr, 2021). Indeed, we speculate that children with less developed repertoires, such as those studied by Richling et al (2019), may require longer frequencies of performance criterion in order to maintain target responses after instruction.…”