Test-retest results
All Thai children completed all tests. Means,
standard deviations, p-values of mean differences and
correlation coefficients are presented in Table 2. For
tests without alternate forms, paired t-tests revealed
no significant differences between tests administered
at time 1 and 2 with the exception of VMI. VMI performance
significantly improved from the first to the
second testing session. All test-retest reliabilities were
significant for tests without alternate forms ranging
from r = 0.41 to 0.77.