Construct Validity of Information System Quality

This report examines the construct of information systems quality. It is measured with the use of four questionnaire items that elicit perceptions of quality from the end users of the information system. These items query the level of functionality, information sufficiency, response time, flexibility, ease of use and overall quality of the system. The representational assumptions of the instrument are examined, with emphasis placed on the need for user experience of the system under examination. The evidence of construct validity is observed, which includes measures of unidimensionality, reliability validity, convergent and discriminant validity, with all except convergent validity holding true. Other studies using information system quality constructs are then discussed, with the conclusion that there exists a utility for the construct in both the practitioner and academic worlds.