Random selection enhances validity and random assignment enhances validity.
A)internal; internal
B)external; external
C)internal; external
D)external; internal

Question

Quizplus · Accepted Answer

Random selection enhances external validity because it ensures that the sample is representative of the population. Random assignment enhances internal validity because it reduces the likelihood of confounding variables and ensures that any differences between groups are due to the treatment and not other factors.

Random Selection Enhances Validity and Random Assignment Enhances Validity