testinfo_data_RAPI: testinfo_data_RAPI

In bpoconnor/IRTtestinfo: IRTtestinfo

Description

A data frame with IRT test information coefficients and the corresponding z values for the Rutgers Alcohol Problem Index, based on responses from 895 participants (Neal et al., 2006). The z values are in the first column and the test information values are in the second column.

Usage

data(testinfo_data_RAPI)

Source

Neal, D. J., Corbin, W. R., & Fromme, K. (2006). Measurement of alcohol-related consequences among high school and college students: Application of item response models to the Rutgers Alcohol Problem Index. Psychological Assessment, 18, 402_414.

Examples

head(testinfo_data_RAPI)

plot(testinfo_data_RAPI, type="l", 
     ylim=c(0,(max(testinfo_data_RAPI[,2])+1)), 
     xlim=c((min(testinfo_data_RAPI[,1])-1),(max(testinfo_data_RAPI[,1])+1)), 
     xlab="Latent Trait", ylab="Test Information", 
     main="Test Information Function for the NEO-FFI-A Scale", font.lab=2, cex.lab=1.3)
## Not run: 

bpoconnor/IRTtestinfo documentation built on Sept. 18, 2020, 11:47 a.m.