M.7(
Materialien aus der Bildungsforschung
Eberhard Schröder
Katja Bödeker
Wolfgang Edelstein
in collaboration with
Thomas Teo
Proportional, Combinatorial, and
Correlational Reasoning
A Manual Including Measurement Procedures and
Descriptive Analyses
Study „Individual Development and Social Structure"
Data Handbooks Part 4
Berlin 2000
Max-Planck-Institut für Bildungsforschung