A data frame with 779 observations on the following variables. The full
dataset is described and analyzed extensively in
Jansen & Van der Maas (2002). The trichotomous data are left, balance, right.
The dichotomous version of the data is scored correct, incorrect.
sex
Participants sex.
agedays
Age in days.
age
Age in years.
t1
Trichotomously scored distance item.
t2
Trichotomously scored distance item.
t3
Trichotomously scored distance item.
t4
Trichotomously scored distance item.
d1
Dichotomously scored distance item.
d2
Dichotomously scored distance item.
d3
Dichotomously scored distance item.
d4
Dichotomously scored distance item.