For three weeks Mr. Gomez recorded the amount of homework his fourth grade students turned in. The next three weeks he rewarded those who turned in homework with free playtime and recorded the turn-in rate for these three weeks. Mr. Gomez is using which design?
a. Counterbalanced c. 3 1 3 factorial
b. One-group time series d. Multiple single-subject design
Ques. 2Indicate whether the following statements are true or false. Validity is a unitary concept, but with different types of evidence of score validity.
a. true b. false
Ques. 3The main disadvantage of a counterbalanced design is the lack of control for
a. carry-over effect of treatment. c. preexisting differences.
b. internal validity. d. pretest sensitization.
Ques. 4An employment test required a high level of reading proficiency, although the job itself did not require high level reading skills. Persons who did not do well on the test had no chance of getting the job. The score validity of this test was negatively impacted by
a. construct underrepresentation. c. construct convergence.
b. construct-irrelevant variance. d. construct divergence.
Ques. 5Counterbalanced designs
a. give the same treatments to all subjects.
b. may involve many groups and treatments.
c. rotate intact groups.
d. a and c
e. All of these are true.
Ques. 6If the reliability coefficient for a set of test scores is .90, we know that
a. 90 of the variance is true variance; 10 is unknown.
b. 90 of the variance is true variance; 10 is error.
c. 90 of the variance is true variance; 10 is reliable.
d. 81 of the variance is true variance; 19 is error.
e. 81 of the variance is true variance; 19 is unknown.
Ques. 7A research study has a design with two groups receiving a pretest, one of which receives treatment, and two groups who are not pretested, one of which receives treatment. This is a
a. counterbalanced design. c. Solomon design.
b. multiple group pretest-posttest design. d. 2 x 2 factorial design.
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