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Educational and Psychological Measurement
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The Use of Control Charts to Display Item Analysis Data

Paul W. Rogers

North Syracuse Central Schools North Syracuse, New York

A procedure is described in this paper for the display of item analysis data using two types of control charts. The item control chart consists of a plot of item difficulty versus each item with action and warning limits drawn to denote boundaries for the 95% and 99% confidence intervals. A reference line is drawn at a mean item difficulty of 50%. The second control chart consists of a plot of item discrimination versus item difficulty for all test items. This procedure provides for a more efficient display of test data and could be used to supplement computerized item-analysis programs.

Educational and Psychological Measurement, Vol. 38, No. 4, 893-897 (1978)
DOI: 10.1177/001316447803800406
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 Educational and Psychological MeasurementHome page
C. W. Bradshaw JR
On Using the Shewhart Control Chart To Display Item Analysis Data
Educational and Psychological Measurement, December 1, 1980; 40(4): 969 - 973.
[Abstract]