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Exploring the individual differences of the longitudinal growth of early numeracy (EN) in young children with Intellectual disabilities (IDs) prerequires the critical stage of exploring and validating the potential factor structure. Despite the fact that Relational Skills (RS), Counting Skills (CS) and Operations (O) are expected to constitute distinct domains of EN, there is not sufficient evidence to support either the above position or the position that they are different means of assessing a general-informal numeracy skill construct. This study was designed to shed light in the field through the evaluation of a measurement model describing the structure of RS, CS and O domains of EN and their interrelation. The sample included N = 155 children with IDs, enrolled in special school classes, mentally aged between 5;02 (y;m) and 6;10 (M = 5.11, SD = 0.974). Confirmatory Factor Analysis indicated a "good fit" of the two-factor model (RS, CS + O) of EN in ID (RMSEA=0.029 < 0.08, CFI = 0.98 [more than or equal to] 0.90 and SRMR = 0.000 < 0.08). No measurement invariance across gender was reported for the proposed two-factor model of EN. The nested EN models validated full measurement invariance across gender. Finally, educational implications are discussed.

The current study explores the parental perspectives of children with intellectual disabilities (ID) on the effectiveness of inclusive education in Greek mainstream schools. The participants were 83 parents, whose children had different degrees of ID and all of them were attending mainstream schools at the time of the study. They completed a questionnaire examining their perspectives with regard to (a) the most effective educational placement in mainstream schools (special class, mainstream class or co-teaching), (b) their satisfaction with the inclusive mainstream education, (c) their cooperation with the teachers, (d) the perceived benefits of their children's educational placement and (e) their suggestions regarding the improvement of the inclusive educational model. Results indicated that most parents of children with ID would like their child to attend a mainstream class with a co-teaching arrangement. The perceived benefits are mostly related to the development of their children's social skills. Significant considerations regarding cooperation with the teachers, lack of individualized information and guidance, administrative and organizational issues were expressed.