Question

An experiment was conducted to examine two different memorization methods to see which method allows people to remember better. 40 participants were recruited to participate in the study. Each participant was tested in two separate sessions 1 week apart. In both sessions, a participant was given a list of 100 words (different list in the two sessions), asked to study the list in a specific way, and then tested for memory of those words after 20 minutes. The difference between the sessions was the memorization method. In one session, the participant was asked to silently recite each word three times and go though the whole list. In the other.

Required:
Is there a significant difference in memory performance between the reciting method (Memory1) and the imagery method?

Answer 1

Question Completion:

SubID Memory1 Memory2

1 71 78

2 75 75

3 77 82

4 90 91

5 72 90

6 79 81

7 84 75

8 75 86

9 85 92

10 75 77

11 72 92

12 76 87

13 77 93

14 90 94

15 84 78

16 73 92

17 75 85

18 87 86

19 75 95

20 70 94

21 72 75

22 90 84

23 81 94

24 87 82

25 90 82

26 87 79

27 78 94

28 78 79

29 70 82

30 81 80

31 80 78

32 90 87

33 83 90

34 81 85

35 73 88

36 82 82

37 84 94

38 85 86

39 77 94

40 82 83

Answer:

Since the mean of Memory1 (reciting method) (79.8) is smaller than the mean of Memory2 (imagery method) (85.5), we can conclude that there is a significant difference in memory performance between the reciting method and the imagery method.

Explanation:

a) Data and Calculations:

SubID Memory1 Memory2

1 71 78

2 75 75

3 77 82

4 90 91

5 72 90

6 79 81

7 84 75

8 75 86

9 85 92

10 75 77

11 72 92

12 76 87

13 77 93

14 90 94

15 84 78

16 73 92

17 75 85

18 87 86

19 75 95

20 70 94

21 72 75

22 90 84

23 81 94

24 87 82

25 90 82

26 87 79

27 78 94

28 78 79

29 70 82

30 81 80

31 80 78

32 90 87

33 83 90

34 81 85

35 73 88

36 82 82

37 84 94

38 85 86

39 77 94

40 82 83

Total 3,193 3,421

Mean 79.8 85.5

Difference in means = 5.7 (85.5 - 79.8)