Author Question: Randomization in selection and assignment can control A) only one variable at a time. B) for ... (Read 14 times)

codyclark · **on:** Aug 4, 2018

Randomization in selection and assignment can control

A) only one variable at a time.
B) for threats to external validity but not for threats to internal validity.
C) for many variables simultaneously.
D) for threats to internal validity but not for threats to external validity.

Question 2

When participants are randomly assigned to conditions,

A) potential confounding variables are distributed in a biased manner.
B) potential confounding variables are distributed equally among the conditions.
C) an equal number of participants is guaranteed in all conditions.
D) there will always be an unequal distribution of males and females.