Question 1

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.

Accepted Answer

The answer of Researchers design a study to test the...

Question 2

You have a hypothesis that sugar decreases the ability to remember lists of words,and that this impairment increases with the amount of sugar that is administered.Design a between groups single factor true experiment to test this idea.Be sure to define your independent and dependent variables.How will you recruit subjects? How will you allocate subjects and conditions?

Accepted Answer

The answer of You have a hypothesis that sugar decreases...

Question 3

A researcher plans a study to test the effectiveness of the discussion method in an introductory research methods course at the college level.One instructor will use the discussion method in her class several times during the semester.Another instructor will teach the same content,but without using the discussion method.The researcher will collect the following data: student scores on mid-term and final exams and on a scale measuring attitudes toward instruction.Discuss at least three recommendations that you can provide to improve this experimental design.

Accepted Answer

The answer of A researcher plans a study to test...

Question 4

Consider the posttest-only design with nonequivalent control groups.Can you think of an experimental situation in which this design might be necessary? How could you potentially strengthen the experimental design?

Accepted Answer

The answer of Consider the posttest-only design with nonequivalent control...

Question 5

A psychology professor wants to test the effectiveness of providing students in his introductory experimental psychology class with an outline of his weekly lecture notes.He randomly forms two groups within his class,each containing 24 students.The experimental group receives an outline of the professor's weekly lectures,and the control group receives no outline.On the basis of this description,discuss what flaw is most evident in the design of the experiment.Identify and design and discuss an alternative procedure that might eliminate the flaws.

Accepted Answer

The answer of A psychology professor wants to test the...

Quiz 11: True Experiments, part 1: Single-Factor Designs

Consider the posttest-only design with nonequivalent control groups.Can you think of an experimental situation in which this design might be necessary? How could you potentially strengthen the experimental design?