An Experimenter Finds That Students in a Morning Class Perform

question 80

Multiple Choice

An experimenter finds that students in a morning class perform better on a math test after being taught with a new teaching method compared with students in an afternoon class who are taught with a standard teaching method. He concludes that the new teaching method is superior to the old method. The main problem with this experimenter's conclusion is:

• A) he did not find a random sample of participants.
• B) he did not consider the importance of external validity.
• C) he did not consider the possible influence of participant bias.
• D) he did not consider the time of day that students were being taught.

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