While Conducting a Year-Long Study on Friendship Patterns in the Sixth

question 36

Multiple Choice

While conducting a year-long study on friendship patterns in the sixth grade, a researcher discovers that some of the students had reached puberty during that year while others had not. Which potential threat to internal validity would this example illustrate according to Campbell and his colleagues?

• A) selection
• B) instrumentation
• C) maturation
• D) history

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