“…Evidence of validity based on test-criterion relationships was collected by analyzing the effects of the child's gender, maternal education, and birth order on the CDI-III-PT scores. No gender differences were found in any of the two subscales, supporting the findings of other studies that suggest that boys catch up to girls' language abilities in preschool years (Altinkaynak, 2019;Fung et al, 2019;Jin et al, 2020;van der Wilt et al, 2020). Significant effects were found for maternal education in both subscales, a result which is also congruent with the findings of previous research in early development (Umek et al, 2006;Weigel et al, 2006;Fenson et al, 2007;Richels et al, 2013;Andonova, 2015;Gonzalez et al, 2017;Cadime et al, 2018;Farley and Piasta, 2020).…”