This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Bradshaw, C. W. Search for Related Content Social Bookmarking                         What's this?

On Using the Shewhart Control Chart To Display Item Analysis Data

Western Electric Company

A procedure was described by Rogers (1978) for using statistical control charts to display test item analysis data. Rogers' charts in volved plotting individual item difficulty indices with control limits and centerline values derived from an implicitly assumed mean item difficulty of 50%. The author of the present paper contends that a more useful representation of test item characteristics can be ob tained by adopting the usual control charting convention of allow ing the data itself to determine limit and centerline values. Then these values can be compared to any criterion difficulty level(s) deemed appropriate for a given set of test items. Although control charts cannot always be applied to item analysis, the author de scribes two specific situations where they can be used.

Educational and Psychological Measurement, Vol. 40, No. 4, 969-973 (1980)
DOI: 10.1177/001316448004000421


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?