get.itn: Read ConQuest 'itanal' Output Files

In eatRest: eatRest

Description

Reads ConQuest files comprising item analyses generated by the 'itanal' statement.

Usage

get.itn(file)

Arguments

file	Character string with the name of the ConQuest item analysis file.

Value

A data frame with one row per item response category containing the following columns:

item.nr	Number of the item in the analysis
item.name	Name of the item
Label	Response category label
Score	Score of this response category
n.valid	Total number of students who responded to this item
Abs.Freq	Number of students who gave this response
Rel.Freq	Number of students who gave this response as a percentage of the total number of respondents to the item
p	Percentage of students who answered this item correctly
pt.bis	Point-biserial for this response
t.value	T-Value of the significance test whether the point-biserial correlation is different from 0
p.value	p-Value of the significance test whether the point-biserial correlation is different from 0
PV1.Avg.1	Mean ability of students who gave this response (based on plausible values)
PV1.SD.1	Standard deviation of ability of students who gave this response (based on plausible values)
pbc	Item discrimination
threshold	Item threshold
delta	Item delta

If the model is multidimensional, the mean and standard deviation of the ability of students who gave the respective response will be shown for each dimension.

Author(s)

Sebastian Weirich

References

See pp.193 of Wu, M.L., Adams, R.J., Wilson, M.R., & Haldane, S.A. (2007). ACER ConQuest Version 2.0. Generalised Item Response Modeling Software. Camberwell, Victoria: ACER Press.

eatRest documentation built on May 2, 2019, 6:25 p.m.