Psychometric Properties of the Test of Gross Motor Development-3 for Children With Visual Impairments

Abstract

Results of the Test of Gross Motor Development-2 (TGMD-2) consistently show acceptable validity and reliability for children/adolescents who are sighted and those who have visual impairments. Results of the Test of Gross Motor Development-3 (TGMD-3) are often valid and reliable for children who are sighted, but its psychometric properties are unknown for children with visual impairments. Participants (N = 66;Mage = 12.93,SD = 2.40) with visual impairments completed the TGMD-2 and TGMD-3. The TGMD-3 results from this sample revealed high internal consistency (ω = .89–.95), strong interrater reliability (ICC = .91–.92), convergence with the TGMD-2 (r = .96), and good model fit, χ2(63) = 80.10,p = .072, χ2/dfratio = 1.27, RMSEA = .06, CFI = .97. Researchers and practitioners can use the TGMD-3 to assess the motor skill performance for children/adolescents with visual impairments and most likely produce results that are valid and reliable.