Measuring Mobile Device Usability as a Second Order Construct in Mobile Information Systems

There are many existing models of usability and instruments to measure it, such as the Administrative Scenario Questionnaire (ASQ) and the Satisfaction Usability Scale (SUS), and the Network Satisfaction Scale (NET). Performance metrics also exist to measure efficiency and effectiveness. However, none of these instruments have been used, separately or together, to measure the overall usability of mobile devices used in mcommerce. A study was conducted to test the usability of mobile devices, and multiple existing metrics were used in order to get an overall view of usability as a second order construct. Confirmatory Factor Analysis found that effectiveness and NET dropped out of the model’s analysis, but a respecified model confirmed that usability was a second order construct, predicted by efficiency, SUS, and ASQ.