Physical Variables that Affect Internal Validity

Instructions:

Choose an answer and hit 'next'. You will receive your score and answers at the end.

question 1 of 3

Internal validity is the extent to which a researcher can say ______ is causing changes in the dependent variable.

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1. Which of the following is the best definition of extraneous variables?

2. Nikki is doing an experiment to see if eating breakfast helps people focus. She uses two types of students: those in a gifted class and those who are in a standard class. Which of these is the best example of a possible extraneous variable?

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About This Quiz & Worksheet

This quiz and worksheet gauge your understanding of physical variables that have effects on internal validity. Terms you will need to know for the quiz include extraneous variables and internal validity.

Quiz & Worksheet Goals

Use these assessment tools to review the following:

  • Different extraneous variables
  • Definition of internal validity
  • Purpose of internal validity

Skills Practiced

This quiz and worksheet combo can help you practice the following skills:

  • Interpreting information - verify that you can read information regarding internal validity and interpret it correctly
  • Knowledge application - use your knowledge to answer questions about extraneous variables
  • Information recall - access the knowledge you have gained regarding how to limit extraneous variables

Additional Learning

To learn more about internal validity, review the corresponding lesson titled Physical Variables that Affect Internal Validity. This lesson covers the following objectives:

  • Define internal validity
  • Determine how situational variables can be controlled
  • Identify different kinds of extraneous variables
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