Two Independent Groups Random selection of subjects is to ____ as random assignment of subjects to conditions is to
A)confounding; external validity.
B)external validity; internal validity.
C)internal validity; external validity.
D)selection threat; biased sampling.

Question

Quizplus · Accepted Answer

Random selection of subjects is a process used to ensure that the sample of participants is representative of the population from which it is drawn, which is important for external validity. On the other hand, random assignment of subjects to conditions is a process used to ensure that participants have an equal chance of being assigned to each treatment group, which helps to control for extraneous variables and increase internal validity. Therefore, the best choice is B, which correctly matches random selection with external validity and random assignment with internal validity.

Two Independent Groups Random Selection of Subjects Is to ____