The following does not represent a threat to internal validity of randomized controlled experiments:
A)attrition.
B)failure to follow the treatment protocol.
C)experimental effects.
D)a large sample size.

Question

Quizplus · Accepted Answer

A large sample size actually enhances the internal validity of a randomized controlled experiment by increasing the statistical power of detecting true effects and reducing the probability of detecting false effects. Attrition, failure to follow the treatment protocol, and experimental effects can all threaten the internal validity of the experiment.

The Following Does Not Represent a Threat to Internal Validity