QuestionJuly 10, 2025

Which of the following threatens the internal validity of an experiment? Using more than one dependent variable. Failing to use a random sample. Failing to randomly assign participants to experimental conditions. Using more than one independent variable.

Which of the following threatens the internal validity of an experiment? Using more than one dependent variable. Failing to use a random sample. Failing to randomly assign participants to experimental conditions. Using more than one independent variable.
Which of the following threatens the internal validity of an experiment?
Using more than one dependent variable.
Failing to use a random sample.
Failing to randomly assign participants to experimental conditions.
Using more than one independent variable.

Solution
4.1(244 votes)

Answer

Failing to randomly assign participants to experimental conditions. Explanation Internal validity refers to the extent to which an experiment accurately establishes a cause-and-effect relationship. Failing to randomly assign participants can introduce confounding variables, thus threatening internal validity.

Explanation

Internal validity refers to the extent to which an experiment accurately establishes a cause-and-effect relationship. Failing to randomly assign participants can introduce confounding variables, thus threatening internal validity.
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