Dietrich AlbertChristina M. SteinerEmpirical Validation of Concept Maps: Preliminary Methodological Considerations.952-9532005conf/icalt/2005ICALThttps://doi.org/10.1109/ICALT.2005.135https://doi.ieeecomputersociety.org/10.1109/ICALT.2005.135db/conf/icalt/icalt2005.html#AlbertS05