1. Thurstone Scaling

2. Thurstone Scaling - Methods
Equal-appearing intervals
Successive intervals
Paired comparison

3. Equal-Appearing Intervals
Start with a large set of items that you think all reflect the same construct.
Decide how to manage multiple tasks. 20
Decide how to manage multiple tasks. 20
Manage resources effectively. 4
Decide how to manage multiple tasks. 20
Manage resources effectively. 4
Manage resources effectively. 4
Decide how to manage multiple tasks. 20
Manage resources effectively. 4
Decide how to manage multiple tasks. 20
Work quickly and effectively under pressure 49
Decide how to manage multiple tasks. 20
Work quickly and effectively under pressure 49
Work quickly and effectively under pressure 49
Manage resources effectively. 4
Manage resources effectively. 4
Decide how to manage multiple tasks. 20
Decide how to manage multiple tasks. 20
Decide how to manage multiple tasks. 20
Organize the work when directions are not specific. 39
Decide how to manage multiple tasks. 20
Work quickly and effectively under pressure 49
Manage resources effectively. 4
Organize the work when directions are not specific. 39
Manage resources effectively. 4
Manage resources effectively. 4
Manage resources effectively. 4
Organize the work when directions are not specific. 39
Decide how to manage multiple tasks. 20
Organize the work when directions are not specific. 39
Work quickly and effectively under pressure 49
Manage resources effectively. 4
Work quickly and effectively under pressure 49
Work quickly and effectively under pressure 49
Work quickly and effectively under pressure 49
Work quickly and effectively under pressure 49
Organize the work when directions are not specific. 39
Work quickly and effectively under pressure 49
Organize the work when directions are not specific. 39
Organize the work when directions are not specific. 39
Work quickly and effectively under pressure 49
Organize the work when directions are not specific. 39
Organize the work when directions are not specific. 39
Organize the work when directions are not specific. 39
Organize the work when directions are not specific. 39

4. Equal-Appearing Intervals
Many judges individually sort these into 11 piles where:
1 = least favorable to the concept
11 = most favorable to the concept
Manage resources effectively. 4
Organize the work when directions are not specific. 39 1 2 3 4 5 6
Decide how to manage multiple tasks. 20 7 8 9 10 11
Work quickly and effectively under pressure 49

5. Equal-Appearing Intervals
For each item, plot the distribution of pile numbers.

6. Equal-Appearing Intervals
For each item, plot the distribution of pile numbers.

7. Equal-Appearing Intervals
For each item, plot the distribution of pile numbers.
Get the median.

8. Equal-Appearing Intervals
For each item, plot the distribution of pile numbers.
and interquartile range.
Get the median.

9. Equal-Appearing Intervals
Choose those items that are at equal intervals (from 1 to 11) and that have the smallest interquartile range. 1 2 3 4 5 6 7 8 9 10 11
Decide how to manage multiple tasks. 20
Organize the work when directions are not specific. 39
Decide how to manage multiple tasks. 20
Organize the work when directions are not specific. 39
Organize the work when directions are not specific. 39
Manage resources effectively. 4
Work quickly and effectively under pressure 49
Manage resources effectively. 4
Work quickly and effectively under pressure 49

10. The Other Methods
Follow a specific procedure for sorting/comparing items in terms of the concept of interest.
Use a simple statistical analysis to determine scale value for each item.
Select items from across the scale range.

11. How Does Respondent Use?
Respondent checks agree or disagree for each item.
The respondent’s total score is the average scale value of all the items agreed to.