Description

This is an example dataset involving Mathematics items for German fourth graders. Items are classified into several domains and subdomains (see Section Format). The dataset contains 664 students on 30 items.

Usage

Format

The dataset is a list. The list element data contains the dataset with the demographic variables student ID (idstud) and a dummy variable for female students (female). The remaining variables (starting with M in the name) are the mathematics items.
The item metadata are included in the list element item which contains item name (item) and the testlet label (testlet). An item not included in a testlet is indicated by NA. Each item is allocated to one and only competence domain (domain).

The format is:

List of 2
$ data:'data.frame':
..$ idstud: int [1:664] 1001 1002 1003 ...
..$ female: int [1:664] 1 1 0 0 1 1 1 0 0 1 ...
..$ MA1 : int [1:664] 1 1 1 0 0 1 1 1 1 1 ...
..$ MA2 : int [1:664] 1 1 1 1 1 0 0 0 0 1 ...
..$ MA3 : int [1:664] 1 1 0 0 0 0 0 1 0 0 ...
..$ MA4 : int [1:664] 0 1 1 1 0 0 1 0 0 0 ...
..$ MB1 : int [1:664] 0 1 0 1 0 0 0 0 0 1 ...
..$ MB2 : int [1:664] 1 1 1 1 0 1 0 1 0 0 ...
..$ MB3 : int [1:664] 1 1 1 1 0 0 0 1 0 1 ...
[...]
..$ MH3 : int [1:664] 1 1 0 1 0 0 1 0 1 0 ...
..$ MH4 : int [1:664] 0 1 1 1 0 0 0 0 1 0 ...
..$ MI1 : int [1:664] 1 1 0 1 0 1 0 0 1 0 ...
..$ MI2 : int [1:664] 1 1 0 0 0 1 1 0 1 1 ...
..$ MI3 : int [1:664] 0 1 0 1 0 0 0 0 0 0 ...
$ item:'data.frame':
..$ item : Factor w/ 30 levels "MA1","MA2","MA3",..: 1 2 3 4 5 ...
..$ testlet : Factor w/ 9 levels "","MA","MB","MC",..: 2 2 2 2 3 3 ...
..$ domain : Factor w/ 3 levels "arithmetic","geometry",..: 1 1 1 ...
..$ subdomain: Factor w/ 9 levels "","addition",..: 2 2 2 2 7 7 ...