Short Answer

A researcher is employing a pretest-posttest design with switching replication to study a new teaching method in two nonequivalent classrooms. Both classes take a baseline pretest, Classroom 1 receives the new teaching method while Classroom 2 receives standard instruction, and then both classes take a posttest. According to the design's sequential procedure, what is the immediate next step the researcher must take?

Question: A researcher is employing a pretest-posttest design with switching replication to study a new teaching method in two nonequivalent classrooms. Both classes take a baseline pretest, Classroom 1 receives the new teaching method while Classroom 2 receives standard instruction, and then both classes take a posttest. According to the design's sequential procedure, what is the immediate next step the researcher must take?

Sample answer: The researcher must implement the new teaching method (the treatment) in Classroom 2 (the control group).

Key points:

  • The treatment is implemented in the control group.
  • Classroom 2 must receive the new teaching method.

Feedback: A correct answer will identify that the treatment must be added to the control group (Classroom 2) following the first posttest, before the final measurement is taken.

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Updated 2026-05-27

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Research Methods in Psychology - 4th American Edition @ KPU

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