Researcher Variables that Affect Internal Validity


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question 1 of 3

High internal validity means that the researcher can say that _____ caused changes in the dependent variable.

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1. Mary wants to study the effect of caffeine on productivity. Which of the following is the best example of an extraneous variable for this study?

2. Jillian believes that women are better at science than men. She gives a group of subjects a science test and then grades the women's test easier than the men's. This is an example of what type of bias?

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About This Quiz & Worksheet

Internal validity is the extent to which a researcher can say that only their independent variable caused changes in the dependent variable, and this quiz and worksheet combination will help you test your knowledge on this concept in scientific research. The questions on the quiz will test you on degrees of internal validity, extraneous variables, and bias.

Quiz & Worksheet Goals

In these assessments, you'll be tested on your understanding of:

  • High and low internal validity
  • The definition of an extraneous variable
  • Researcher personality
  • Selection bias
  • Researcher bias

Skills Practiced

This quiz and worksheet will allow you to test your skills in the following areas:

  • Reading comprehension - ensure that you draw the most important information from the related psychology lesson
  • Critical thinking - apply relevant concepts to examine information about research in a different light
  • Defining key concepts - ensure that you can accurately define main phrases, such as researcher and selection bias, as well as internal validity and extraneous variables
  • Knowledge application - use your knowledge to answer questions about research, variables, biases, and internal validity

Additional Learning

To learn more about this topic, review the lesson Research Variables that Affect Internal Validity. This lesson covers the following objectives:

  • Define internal validity
  • Describe situations wherein internal validity could be an issue for a researcher
  • Understand researcher and selection bias
  • Define and understand researcher personality