Test-retest reliability and standard error of measurement for the test of variables of attention (TOVA) with healthy school-age children

Test-retest reliability of the Test of Variables of Attention (T.O.V.A.) was investigated in two studies using two different time intervals: 90 min and 1 week (+/- 2 days). To investigate the 90 min reliability, 31 school-age children (M = 10 years, SD = 2.66) were administered the T.O.V.A. then readministered the test 90 min afterward. Significant reliability coefficients were obtained across omission (.70), commission (.78), response time (.84), and response time variability (.87). For the second study, a different sample of 33 school-age children (M = 10.01 years, SD = 2.59) were administered the test then readministered the test I week later Significant reliability coefficients were obtained for omission (. 86), commission (.74), response time (.79), and response time variability (.87). Standard error of measurement statistics were calculated using the obtained coefficients. Commission scores were significantly higher on second trials for each retest interval.