The IRT Procedure
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Overview
- Getting Started
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Syntax
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DetailsNotation for the Item Response Theory ModelAssumptionsPROC IRT Contrasted with Other SAS ProceduresResponse ModelsMarginal LikelihoodApproximating the Marginal LikelihoodMaximizing the Marginal LikelihoodFactor Score EstimationModel and Item FitItem and Test informationMissing ValuesOutput Data SetsODS Table NamesODS Graphics
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Examples
- References
WEIGHT Statement
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WEIGHT variable;
The WEIGHT statement specifies the weight variable for the observations. The WEIGHT and FREQ statements have a similar effect, except that the WEIGHT statement does not alter the number of observations. An observation is used in the analysis only if the WEIGHT variable is greater than 0 and is not missing.