Gender Differences
Mann-Whitney U test was used to assess the existence of gender differences in reflex inhibition. When comparing this variable in the full sample, significant differences (p < 0.05) between boys and girls were only found in the percentage of MR reflex inhibition, with medium effect size (R = 0.2), boys scoring higher than girls. When gender was examined within groups, significant differences (p < 0.1) between boys and girls were also found in the percentage of MR reflex inhibition in group A (Table 5), with medium effect size (R = 0.2).
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Mann-Whitney U test was performed to compare boys and girls regarding motor competence. In the full sample, significant gender differences (p < 0.01) were found in all the instrument dimensions. More specifically, in group A the data yielded gender differences in aiming and catching, with a significance value of p = 0.043 (Table 5).
Finally, gender differences were observed in the crawling pattern development. Only 19% of boys had developed the crawling pattern, compared to 42.2% of girls. Mann-Whitney U test revealed significant differences (p < 0.05) with small effect size (R = 0.2). Within-group differences by gender were also analyzed, but no significant results were obtained.