A researcher is planning an experiment to test the effectiveness of the discussion method at the high school level. One teacher has agreed to use the discussion method in her class several times a week for a semester. Another teacher has agreed to teach the same content but without using the discussion method. The researcher will collect the following data: student scores on an achievement test and on a scale measuring attitudes toward the instruction. What recommendations can you offer to improve the representativeness of this experimental design?

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The Answer of A researcher is planning an experiment to test the effectiveness of the discussion method at the high school level. One teacher has agreed to use the discussion method in her class several times a week for a semester. Another teacher has agreed to teach the same content but without using the discussion method. The researcher will collect the following data: student scores on an achievement test and on a scale measuring attitudes toward the instruction. What recommendations can you offer to improve the representativeness of this experimental design?

A Researcher Is Planning an Experiment to Test the Effectiveness