sysToItemDifDf function

sysToItemDifDf

Creates a data frame that includes the common item parameter estimates from two (or more) system files (e.g., a DIF analysis).

sysToItemDifDf(listOfSysFiles, mySuffixes, myDims = "all")

Arguments

• listOfSysFiles: A list of system files returned from conquestr::ConQuestSys
• mySuffixes: a vector of strings specifying the names for the two groups being analysed, e.g., if the two system files are an analysis of boys and girls, the vector may be c(_male", "_female").
• myDims: A string specifying if all or specific dimensions should be included. The default is "all", Specific dimensions are specified by the label "D1" for dimensions 1 etc.

Returns

A data frame object.

See Also

conquestr::plotDif ()