A Researcher Does a Study of a Mathematics Program in a One-Group

question 90

Multiple Choice

A researcher does a study of a mathematics program in a one-group pretest-posttest design. She gives the group of second graders a multiple-choice pretest. Unknown to her, the children had never taken a multiple-choice test. The children scored higher on the same test given at posttest. She argues that the children improved because of the mathematics program. That the children had never taken a multiple-choice test before and showed improvement at posttest suggests that one possible threat to her conclusion is a:

• A) History effect
• B) Multiple-treatment interference
• C) Testing effect
• D) Selection effect

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