The difference between the group means in a pretest-posttest control group experimental design can be tested for statistical significance most precisely by
a. analysis of variance of the groups' means on the posttest.
b. separate t-tests of the prepost difference for the experimental and for the control group.
c. analysis of covariance on the groups' posttest means with pretest as the covariate.
d. analysis of variance of the mean changes from pre- to posttest for the two groups.
C
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a. True b. False
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Indicate whether the statement is true or false
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a. are transferable across instructional events. b. lead to fun learning activities for the students. c. are broad enough to apply to any content area. d. are specific enough to relate to one particular concept or text.
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