(Scenario II) Suppose the researchers manipulated the independent variable such that the heavy backpack was 5 pounds and the light backpack was 3 pounds. After conducting the study they saw no difference between the groups when choosing a snack. Prior to the study the researchers should have probably conducted a(n):
A) simple experiment.
B) independent sample t-test.
C) two-group design.
D) manipulation check.

Question

Quizplus · Accepted Answer

A manipulation check ensures that the independent variable manipulation (in this case, the weight of the backpack) had the intended effect on the participants before examining the dependent variable (snack choice). Since there was no difference observed, it's possible the manipulation was not effective or perceived as intended, making a manipulation check crucial to identify this issue.

(Scenario II) Suppose the Researchers Manipulated the Independent Variable Such