format
The dataset is a list. The list element data
contains the dataset with the demographical variables
student ID (idstud), school ID (idschool), a dummy variable for female
students (female), socioeconomic status (hisei)
and migrational background (migra). The remaining
variables (starting with R in the name) are
the reading items.
The item metadata are included in the list element
item which contains item name (item),
testlet label (testlet), item format (ItemFormat),
text type (TextType) and text aspect (Aspect).
The format is:
List of 2
$ data:'data.frame':
..$ idstud : num [1:623] 9e+10 9e+10 9e+10 9e+10 9e+10 ...
..$ idschool: int [1:623] 900003 900003 900003 900003 ...
..$ female : int [1:623] 1 0 1 0 0 0 1 0 1 0 ...
..$ hisei : num [1:623] -1.16 -0.671 1.286 0.185 1.225 ...
..$ migra : int [1:623] 0 0 0 0 0 0 0 0 0 0 ...
..$ R432Q01 : int [1:623] 1 1 1 1 1 1 1 1 1 1 ...
..$ R432Q05 : int [1:623] 1 1 1 1 1 0 1 1 1 0 ...
..$ R432Q06 : int [1:623] 0 0 0 0 0 0 0 0 0 0 ...
..$ R456Q01 : int [1:623] 1 1 1 1 1 1 1 1 1 1 ...
..$ R456Q02 : int [1:623] 1 1 1 1 1 1 1 1 1 1 ...
..$ R456Q06 : int [1:623] 1 1 1 1 1 1 0 0 1 1 ...
..$ R460Q01 : int [1:623] 1 1 0 0 0 0 0 1 1 1 ...
..$ R460Q05 : int [1:623] 1 1 1 1 1 1 1 1 1 1 ...
..$ R460Q06 : int [1:623] 0 1 1 1 1 1 0 0 1 1 ...
..$ R466Q02 : int [1:623] 0 1 0 1 1 0 1 0 0 1 ...
..$ R466Q03 : int [1:623] 0 0 0 1 0 0 0 1 0 1 ...
..$ R466Q06 : int [1:623] 0 1 1 1 1 1 0 1 1 1 ...
$ item:'data.frame':
..$ item : Factor w/ 12 levels "R432Q01","R432Q05",..: 1 2 3 4 ...
..$ testlet : Factor w/ 4 levels "R432","R456",..: 1 1 1 2 ...
..$ ItemFormat: Factor w/ 2 levels "CR","MC": 1 1 2 2 1 1 1 2 2 1 ...
..$ TextType : Factor w/ 3 levels "Argumentation",..: 1 1 1 3 ...
..$ Aspect : Factor w/ 3 levels "Access_and_retrieve",..: 2 3 2 1 ...