Our study analyse the validity and the reliability of two well-known questionnaires for the usability assessment, the SUMI and the QUIS, in their Italian version. The sample is composed of 250 university students of psychology (University of Rome “La Sapienza”, Faculty of Psychology 1), that used two questionnaires to assess the usability of the faculty website. The principal components analysis of the two questionnaires did not show the attended factors divisions. The reliability and the convergent validity analysis show some psychometric limits. The Pearson’s coefficient analysis show a low correlation between these two tools’ data, indicating that the SUMI and the QUIS assess different aspects of usability. These results, showing the limits of the questionnaires, underline the increasing necessity to use integrate usability evaluation methodologies in order to catch all multi-dimensional aspects of the human computer interaction.
Le misure dell’usabilità: Studio sulle caratteristiche psicometriche del QUIS e del SUMI nella versione italiana
FEDERICI, Stefano;BORSCI, SIMONE;
2009
Abstract
Our study analyse the validity and the reliability of two well-known questionnaires for the usability assessment, the SUMI and the QUIS, in their Italian version. The sample is composed of 250 university students of psychology (University of Rome “La Sapienza”, Faculty of Psychology 1), that used two questionnaires to assess the usability of the faculty website. The principal components analysis of the two questionnaires did not show the attended factors divisions. The reliability and the convergent validity analysis show some psychometric limits. The Pearson’s coefficient analysis show a low correlation between these two tools’ data, indicating that the SUMI and the QUIS assess different aspects of usability. These results, showing the limits of the questionnaires, underline the increasing necessity to use integrate usability evaluation methodologies in order to catch all multi-dimensional aspects of the human computer interaction.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
