Which threat to internal validity is controlled by randomly assigning research participants to experimental conditions?
A) selection
B) history
C) maturation
D) testing
E) attrition

Question

Quizplus · Accepted Answer

Random assignment to experimental conditions controls for selection bias, as it ensures that participants are equally likely to be assigned to any of the conditions, regardless of their individual characteristics.

Which Threat to Internal Validity Is Controlled by Randomly Assigning