This study examined the relation between involvement in school-based extracurricular activities and early school dropout. Longitudinal assessments were completed for 392 adolescents (206 girls, 186 boys) who were initially interviewed during 7th grade and followed up annually to 12th grade. A person-oriented cluster analysis based on Interpersonal Competence Scale ratings from teachers in middl...

Many validity measures have been proposed for evaluating clustering results. Most of these popular validity measures do not work well for clusters with different densities and/or sizes. They usually have a tendency of ignoring clusters with low densities. In this paper, we propose a new validity measure, which can deal with this situation. The performance evaluation of the validity measure comp...

In this paper we introduce EDUFORM, an adaptive questionnaire designed for profiling students in various educational contexts. The idea is to build a probabilistic model from previously gathered data, and use it for profiling other people more efficiently. EDUFORM selects the questions presented to each individual adaptively in order to minimize the number of answers needed for reliable predict...