試題詳解

19. When regressing the testing scores on the ages and groups for all participants, which statement is false?
(A). The slope for age is likely to be negative
(B), Significant slope for age is in support of construct validity of the test
(C). The variance of test scores explained by age and group is usually greater than age alone
(D). Significant group by age interaction suggests the group efiect on test scores is mediated by age