writing.data: Hypothetical writing prompt example

In cddesja/REPM: Companion package to Handbook of Educational Measurement and Psychometrics Using R.

Description

This is a hypothetical data set to demonstrate a two facet cross design for generalizability theory. The design is an S X W X R design, a student by writing prompt by rater design. See chapter 3 of "Using R for Educational and Psychological Measurement" for more details.

Usage

writing.data

Format

A data frame with 100 rows and 4 variables:

student

The student identifier

prompt

The writing prompt identifier. There were five prompts

rater

The rater identifier. There were two raters.

score

Student score on the writing prompt. Ranged from 4 - 100, with a maximum score of 100.

Source

Desjardins, C. D. & Bulut, O. (2017). Using R for Educational and Psychological Measurement.

Examples

library(lme4)
two.facet <- lmer(scores ~ (1 | students) + (1  | prompt) + (1 | rater) + (1 | students:prompt) + (1 | students:rater) + (1 | prompt:rater), data = writing.data)
summary(two.facet)

cddesja/REPM documentation built on May 13, 2019, 2:21 p.m.