The KdV eigenfunction equation is considered: some explicit solutions are constructed. These, to the best of the authors’ knowledge, new solutions represent an example of the powerfulness of the method de- vised. Specifically, Ba ̈cklund transformation are applied to reveal alge- braic properties enjoyed by nonlinear evolution equations they connect.
The aims of the study were to investigate factor structure and reliability of the Alexithymia Questionnaire for Children (AQC), originally validated by Rieffe et al. (2006), on an Italian population. A total sample of 1265 participants, ranging in age from 8 to 14 years, filled in the Italian version of the AQC and 160 children also completed the Youth Self Report (YSR), during school time. A sub-sample (N = 60) was retested after eight weeks for an assessment of the measure’s stability.
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