Researchers Design a Study to Test the Effects of Marijuana

question 35

Essay

Researchers design a study to test the effects of marijuana and alcohol on verbal inhibition.Participants were randomly assigned to four treatment conditions.In condition A,participants smoke a placebo joint; in condition B,participants smoke one marijuana joint; in condition C,participants smoke two marijuana joints; and in condition D,participants smoke two marijuana joints and consume one ounce of alcohol.A word association test containing a number of socially taboo,or dirty,words is administered to each participant 15 minutes after each treatment is administered.Participant l receives condition A the first day,condition B the second day,condition C the third day,and condition D the fourth day.Participant 2 receives condition D the first day,A the second day,B the third day,and C the fourth day.Participant 3 receives condition C the first day,D the second day,A the third day,and B the fourth day.Participant 4 receives condition B the first day,C the second day,D the third day,and A the fourth day.Construct a table that illustrates the experimental design for this study.Identify the design.Discuss whether you think this design controls for sequence effects,order effects,or both.