# Experimental Psychology Case Study

PSY-452-Experimental Psychology

Matched-Subjects Design

1) Separate the 40 participants listed below into two groups of 20, in which each group has an equal number of men and women (10 M, 10 F each). Name the first group A and the second group B.

2) Match 1: Random Assignment

a. Use a random numbers table to accomplish the first match, utilizing Group A and Group B. Please search for a random numbers table on the internet or use the one in the back of the textbook to successfully complete this section of the assignment.

b. Start anywhere in the table and proceed in any direction that you like.

c. Odd numbers put the subjects in Group A; even numbers in Group B.

d. When one group is filled, the rest go into the other group.

3) Match 2: Range Matching 1

b. Separate the participants into two groups by gender using range matching.

c. Match as many pairs of female participants as possible: find a match and randomly assign one to the Group A, and the other to the Group B.

d. Next, do the same for the male participants.

4) Match 3: Range Matching 2

b. Match participants by two variables: gender AND weight.

c. Decide on your acceptable ranges in advance (i.e., within 5 pounds for females and 10 pounds for males).

d. Find a match and randomly assign one to the Group A, and the other to the Group B.

e. Form a Group C for individuals who do not match.

5) Match 4: Range Matching 3

b. Match the participants on all three variables (gender, weight, and height).

c. Decide on your acceptable ranges in advance (i.e., within 5 pounds for females and 10 pounds for males).

d. Find a match and randomly assign one to Group A, and the other to Group B.

e. Form a Group C for individuals who do not match.

6) Match 5: Rank Order Matching

a. Using the original list of 40 participants, split the participants by gender (all male group and all female group).

b. Then rank groups by weight OR height, using rank-ordered matching (i.e., heaviest to lightest or tallest to shortest).

c. Find a match and randomly assign one to the Group A, and the other to the Group B.

40 Participants to be matched:

Name Gender Weight (lbs.) Height (in.)

#1. Anna BoFanna F 110 60

2. Sandy Beach F 140 70

3. Chuck Wagon M 200 72

4. Ken Garoo M 180 70

5. Seymour Clearly M 190 71

6. Phil O’Dendron M 210 74

7. Rhoda Dendron F 120 65

8. Pete Moss M 150 68

9. Howie Dooit M 160 70

10. Willy Makeit M 180 70

11. Betty Won’t F 100 63

12. Al Gebra M 190 72

13. Carol Ofthebells F 95 55

14. Harold Bethyname M 240 76

15. Andy Walkswithme M 250 75

16. Rod Andreel M 220 72

17. Stu Potts M 190 69

18. Sharon Sometimetogether F 108 65

19. Clara Asabell F 115 68

20. Allyson Wonderland F 118 68

21. April Showers F 110 63

22. Ben Dover M 190 69

23. Hugh Gottabekiddinme M 200 72

24. May Flowers F 130 70

25. June Blossoms F 100 60

26. Helen Highwater F 135 68

27. Sam Iam M 195 69

28. Mike Robiology M 215 72

29. Maye Beeso F 134 67

30. Polly Warner-Cracker F 109 54

31. Rick O’Chet M 140 64

32. Bill Board M 180 70

33. I. C. Freeze M 190 71

34. Barry Um M 200 72

35. Raye Dium F 112 67

36. Helena Baskit F 114 66

37. Summer Rayne F 96 65

38. Deniece Denephew F 122 69

39. Goldie Lox F 105 63

40. Cindy Rella F 124 68