Assessing the Reliability, Validityand Adaptability of PSSUQ

摘要

Psychometrically qualified usability evaluation instruments offer many advantages to the usability practitioner. Advantagesinclude objectivity, replicability, quantification, economy, communication, and scientific generalization. It is important thatinstruments used in usability evaluation have shown acceptable estimates of reliability, validity, adaptability and practicality.This paper compares the psychometric properties of the Post-Study System Usability Questionnaire (PSSUQ) instrument inLewis’ study to a recent study that tailored the PSSUQ instrument to measure the user satisfaction of the usability of a webbasedhealth provider interface.Lewis reported that the PSSUQ had acceptable psychometric properties. However, Lewis’ stated PSSUQ had limitedgeneralizability and needed further examination. This research validated the PSSUQ instrument using a larger sample size ina different domain. The factor analysis and the clustering of the sub-scale items were different than Lewis’ results.Nevertheless, this research concluded that the PSSUQ instrument is adaptable and produced solid psychometric results.