The effect of relative age effect on physical characteristics and fundamental movement skills in intellectual disabled boys
Author(s): Jimmy Sanderson and Randall Kesselring
Abstract: The aim of this study was to investigate whether physical characteristics and fundamental movement skills were differentiated by relative age effect. Material and Methods: Data were collected from the 60 Intellectual Disabled boys with a mean age of 6,94±0,58 years at Mersin City Center Izem Rehabilitation Center in February, March and April 2018. The age of the participants was calculated in months and divided into three groups as 71-76 months, 77-84 months and 85-93 months. Basic movement skill levels have been determined by the Test of Gross Motor Development (TGMD). Kruskall Wallis test was used to test differences among groups because data did not show normal distribution. Statistical significance was accepted as P<0.05. Results: The findings of this study showed that there was no significant difference between the three groups in terms of mean body height, body weight and body mass index in the Intellectual Disabled boys who do not participate in physical and sportive activity program. In addition, there is no significant difference between the three groups in both locomotor and object control skills. Participants received low scores in the skills of gallop, two hand strike, catching and kicking while the three groups in the sprint, hop, leap and throw had zero points. All three groups demonstrated only positive performance in kicking. Conclusion: Fundamental movement skills are not differentiated in boys with intellectual disabled due to the relative age effect. It seems that they had only the ability to demonstrate the skill of kicking the ball with the foot.