@inproceedings{pme49-derchieindividualdifferences,
  title={INDIVIDUAL DIFFERENCES IN CONCEPTUAL AND PROCEDURAL KNOWLEDGE OF FRACTIONS AND ALGEBRA: A RASCH-BASED ANALYSIS},
  author={D'Erchie, Michael and Forsmann, Claire and Schneider, Michael and Obersteiner, Andreas},
  booktitle={Proceedings of the International Group for the Psychology of Mathematics Education, Volume 1},
  year={2026},
  pages={331--338},
  publisher={Psychology of Mathematics Education (PME)},
  issn={2790-3648},
  url={https://www.igpme.org/publications/RR_PME49/rr/PME49_RR_372_D-Erchie_M/}
}