tangor, C. (2013). Research methods for the behavioral sciences (4th ed., Laureate Education custom ed.). Belmont, CA: Wadsworth Cengage Learning.Chapter 12, “Experimental Control and Internal Validity”Chapter 13, “External Validity” (pp. 254–263)Read the “Thinking Critically About Research” scenarios (a—i) in Chapter 12, pages 256–258.Choose the scenario that most interests you. Note: Before selecting a scenario, view the Discussion 4 Forum to see if any colleagues have already posted. If so, select a letter that has not yet been chosen. All nine (a–i) letters should addressed before a student repeats a letter.
For your chosen scenario, determine the possible confounding variable(s) (there may be more than one), and consider how they might be eliminated using research designs presented in the readings (e.g., 2×2 factorial design).