Measuring Psychological Constructs Using Single-Item Scales: Answers to Experts' Comments and Additional Questions

摘要

This article is an answer to a commentary on Christophersen and Konradt's (2011. Reliability, validity, and sensitivity of a single-item measure of online store usability. Int. J. Hum. Comput Stud., 69,269-280) study on a single-item measure of online store usability. The authors suggest that while their research has demonstrated the psychometric quality of their measure, greater efforts should be made to perform more rigorous tests of measures by applying main and supplemental psychometric quality criteria. In addition, it is suggested that future research should also (ⅰ) examine the type of construct by using formative and reflective measurement models; (ⅱ) put forward relevant cognitive processes during answering questions and (ⅲ) make use of behavioral and physiological data to complement user's self-reports.