Note on the Computation of the Maximum Possible Item-Test Correlation
- Author(s):
- Allison, Roger B.
- Publication Year:
- 1953
- Report Number:
- RM-53-10
- Source:
- ETS Research Memorandum
- Document Type:
- Report
- Page Count:
- 2
- Subject/Key Words:
- Correlation, Item Analysis, Item Test Correlation
Abstract
This note is a restatement of Gulliksen's formula 4 on the maximum possible item-total correlation into a simpler computing procedure. The formula derived here requires only a cumulative sum of the ordered p's, and the information specific to the item.
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