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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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