The following data were obtained from a repeatedmeasures res

The following data were obtained from a repeated-measures research study. What is the value of SS for the difference scores?

Subject

1st

2nd

#1

10

11

#2

4

6

#3

7

9

#4

6

5

Solution

SS for the difference score is the sum of the squares of the difference of the two scores in different subjects:

Sum of Squares of the difference of the scores is

1 + 4 + 4 + 1 = 10