estimate_ft_difficulties: High-level function to estimate/create item difficulty...

In UO-BRT/exirt: Analyze data from the Oregon Extended Assessment

High-level function to estimate/create item difficulty estimates for field-test items

Description

This function does the modeling and pulls the item difficulty estimates for every grade/content area (unless a specific grade/content area is supplied). Operational items are anchored at their previously estimated item difficulty values.

Usage

estimate_ft_difficulties(test, single_df = TRUE)

Arguments

test	Either a list of test score data from which to estimate models or a single data frame with the item-level data. Note, this can be all tests. It does not have to be a list of only one content area, for example.
single_df	Should a single data frame be returned? Defaults to FALSE, in which case a list of data frames is returned (assuming) model_ob is a list of models. Otherwise a single data frame is returned, which may be generally useful, but is less useful when passing the results to other functions in the package.

UO-BRT/exirt documentation built on Jan. 29, 2023, 8:51 a.m.