DrSheffield Is a Clinical Psychologist Who Specializes in Treating Pathological

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 nongamblers.Which of the following options below does he also need to do to get evidence for criterion validity?

A) Give the measure to a group of people attending Gamblers Anonymous meetings
B) Two months later,ask the same group of people to report how many times they have gambled recently
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