__________ is used to ensure internal validity, whereas __________ increases external validity.
A) Random assignment; matching
B) Matching; random assignment
C) Random assignment; random sampling
D) Random sampling; random assignment

Question

Quizplus · Accepted Answer

Random assignment is used to ensure internal validity by evenly distributing potential confounding variables across groups. Random sampling increases external validity by ensuring the sample represents the larger population.

__________ Is Used to Ensure Internal Validity, Whereas __________ Increases

Is Used to Ensure Internal Validity, Whereas Increases