LearningToLearn is a real longitudinal dataset used in Martinkova et al
(2020) study, demonstrating differential item functioning in change (DIF-C)
on Learning to Learn (LtL) test. Among other variables, it primarily contains
binary-coded responses of 782 subjects to (mostly) multiple-choice test
consisting of 41 items within 7 subscales (see Format for details). Each
respondent was tested twice in total -- the first time in Grade 6 and the
second time in Grade 9. Most importantly, school track (variable track_01
or track) is available, with 391 students attending basic school (BS) and
391 pursuing selective academic school (AS). This dataset was created using
propensity score matching algorithm to achieve similar characteristics in
both tracks (see References for details). To further simplify the work
with LtL dataset, we provide computed total scores as well as 7 subscores,
both for Grade 6 and Grade 9. The dataset also includes change variables
for each item (see Format for details) for more detailed DIF-C analysis
using multinomial regression model.
LearningToLearnA LearningToLearn data frame consists of 782 observations on the following 141 variables:
Dichotomously scored school track, where "1" denotes the selective academic school one.
School track, where "AS" represents the selective academic school track, and "BS" stands
for basic school track.
Total test score value obtained by summing all 41 items of LtL, the number denotes
the Grade which the respondent was taking at the time of testing.
Scores of respective cognitive subtest (1--7) of LtL in Grade 6.
Scores of respective cognitive subtest (1--7) of LtL in Grade 9.
Dichotomously coded 41 individual items obtained at Grade 6, "1" represents
the correct answer to the particular item.
Dichotomously coded 41 individual items obtained at Grade 9, "1" represents
the correct answer to the particular item.
Change patterns with those possible values:
a student responded correctly in neither Grade 6 nor in Grade 9 (did not improve, "00")
a student responded correctly in Grade 6 but not in Grade 9 (deteriorated, "10")
a student did not respond correctly in Grade 6 but responded correctly in Grade 9 (improved, "01"), and
a student responded correctly in both grades (did not deteriorate, "11")