Trust is an essential pre-requisite and quality of human-computer interaction (HCI), involved in a variety of domains including banking, commerce, communication, identification and authentication, and many more. Despite the importance of trust in HCI, we found existing trust scales to be difficult to use in practical HCI research: they consist of lengthy questionnaires that take a long time to fill and place a significant burden on respondents. Shorter scales or alternative measuring methods are needed.
At DECO, we are currently measuring trust as well as its antecedents and dependent factors. More specifically, we are currently evaluating the state-of-the-art in the measurement of trust and starting to construct a new scale for measuring the perceived trustworthiness of IT products or services.
One methodological focus is to review the current state-of the art. Students interested in this topic are provided with the opportunity tp learn and practice systematic review methods – an essential skill for describing the state-of-the-art in any scientific undertaking. The according process for systematic literature reviews is visualized in the following figure.
A second methodological focus is in scale development, i.e., in the construction of a new (shortened) psychometric scale for measuring trust. Students working in this area are prototyping the process of scale construction (to learn about and improve the process) and are looking at innovative ways of getting trust ratings (a lot of data is needed in scale construction projects).
 PRISMA Statement and PRISMA Flow Diagram. http://prisma-statement.org/PRISMAStatement/FlowDiagram.aspx, last retrieved Oct 9th, 2019.