irt.itemstructure: IRT Structure File Creation

In m070ch/ips.tools: Tools for IPS

Description

Creates and Formats Item Structures for IRT Calibration.

Usage

irt.itemstructure(items, anchors, write, form)

Arguments

items	The list of items to calibrate in IRT calibration names, see irt.createdata)
anchors	A table of Anchor Items (see imports.anchors)
write	boolean (default = FALSE)- write to .txt file for Winsteps use
form	The form code (only necessary if write = TRUE)

Details

Takes a list of items being calibrated (using the concatenated item name from irt.createdata), and a table of anchor items (see imports.anchors). Merges the two and outputs a list of anchor items- they must be scored on the form, and have an IRT_b value present in the anchor download.

Value

An item structure table

See Also

Other IRT Calibration: irt.cleanupresults, irt.controlcard, irt.createdata, irt.itemanchor, irt.itemweight, irt.personweight

Examples

irt.itemweight(ResponseImport, AnchorImport, 1, TRUE)

m070ch/ips.tools documentation built on May 18, 2019, 8:09 p.m.