A minimum chi-square method for developing a common metric in item response theory

Divgi, D. R.
1985
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A minimum chi-square method for developing a common metric in item response theory

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1985

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The θ scale in item response theory has arbitrary unit and origin. When a group of items is calibrated twice, estimates from one calibration must be transformed to the metric of the other. A new method is presented for doing so. It is simpler than an earlier method based on test characteristic curves, and makes more complete use of available information.

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Applied Psychological Measurement, Volume 09, 1985

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Divgi, D. R. (1985). A minimum chi-square method for developing a common metric in item response theory. Applied Psychological Measurement, 9, 413-415. doi:10.1177/014662168500900410

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Divgi, D. R.. (1985). A minimum chi-square method for developing a common metric in item response theory. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/107573.

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