Dr Sheffield Is a Clinical Psychologist Who Specializes in Treating

Dr. Sheffield is a clinical psychologist who specializes in treating pathological gambling. Pathological gambling is defined as being unable to resist impulses to gamble. Bothered by not having a good measure that he can give to clients to determine whether they are suffering from this condition, he creates a new measure of pathological gambling. The measure has 15 questions, and it takes 20 minutes to complete.
Dr) Sheffield decides to test the criterion validity of his measure. Dr. Sheffield gives his measure to a group of people that includes suspected problem gamblers and non-gamblers. Which of the following options below could he also do to get evidence for criterion validity?

A) Give the measure to a group of people attending Gamblers Anonymous meetings
B) Correlate the measure with a behavior, such as amount of money lost in a casino during the past year
C) Ask the participants to give their opinion on whether the measure is valid
D) Give a measure of alcohol addiction to the same group of clients