“…According to (Scruggs and Mastropieri, 2021), a non-overlapping data percentage of 90% and above can be interpreted as “very effective,” between 70% and 90% as “effective,” between 50% and 70% as “suspicious” and below 50% as “ineffective” (Tekin İftar, 2012). The Tau-U method, which shows the strongest correlation with the visual analysis results among the effect size calculation methods used in single-subject studies and exhibits optimum performance, was used (Balıkçı et al, 2022). In the study, a Tau-U calculation was also made using the program available at https://singlecaseresearch.org/calculators/tau-u to estimate the effect size of the intervention program.…”