RELIABILITY AND CONSTRUCT VALIDITY EVIDENCE OF STANDING LONG JUMP (SLJ) AMONG STUDENTS WHO HAVE VISUAL DISABILITIES

In sports, physical activities, and daily life activities muscular leg power is very essential. Standing Long Jump (SLJ) is a reliable field test that usually been to assess leg power. The purpose of this study is to determine the objectivity, reliability, construct validity evidence among students who are visually-impaired. The evidence of the objectivity, reliability, validity, norm need to establish in the particular population to support the interpretation of the outcome. This study involved 35 male subjects who have visual disabilities and two raters for reliability and validity. The ICC, test-retest, and Pearson Correlation was used to determine the objectivity and reliability of the SLJ. Independent sample t was used to determine the construct validity evidence. Findings showed the ICC was high among male rates (.97). The consistency of the instrument also excellent among subjects (r = .81). Paired sample t-test showed t value (M= 1.76, SD= 0.293) (t (34) = 13.32, p = .000 was significant. Findings showed there are significant different between the final test mean M= 1.76), SD = 0.293) is better than the initial test mean (M=1.68, SD= 0.298) for male subjects. The difference showed the SLJ has the construct validity evidence in this population. The need for having valid and reliable testing instruments will enhance the success of the evaluation and the interpretation for all subjects.