A major disadvantage of between-subjects designs is that
a. the effect of one treatment may alter the effectiveness of later treatments.
b. participant differences may obscure treatment effects.
c. one must employ fewer independent variables.
d. one can use only a single independent variable.
Question 2
Preventing an extraneous variable from becoming a confounding variable by holding it constant can result in a threat to external validity.
a. True
b. False
Indicate whether the statement is true or false
Drugs and their effect table
Naltrexone as a Treatment for Alcoholism
Major veins of the body. Apply deep flushing effleurage to the arms and legs from distal to ...
Mixed dishes such as hamburgers and pizza are a major source of solid fats in the diets of Americans
Major Structures of the Human Brain
Two major types of nerve circuits in the brain