Trust in Automation Inventories: An Investigation and Comparison of the Human-Computer Trust and Trust in Automated Systems Scales
There are numerous ways to measure trust in automation and each has its advantages and disadvantages. The current experiment evaluated and compared the trust in automated systems scale (TASS) and the human-computer trust scale (HCTS). Both the HCTS and TASS showed high internal consistency. While participants’ scores on the HCTS and TASS were highly correlated, the strength of the relationship was stronger between the positive valence items of the TASS and HCTS than between the negative valence items of the TASS and HCTS. Additionally, principal components analyses showed that the TASS had two underlying factors whereas the HCTS had four. Thus, while these trust in automation survey instruments are similar, they are also fundamentally different.