Table 1 The five steps in the ‘chain’ and how they were measured

I

Eye tracker

SMI RED 500^a

II

Structured questionnaire 25 statements

Asking What is it you see?

III

Structured questionnaire 25 statements

Asking What do need to know/to do now?

IV

Acceptance and Usability Questionnaire

Verbal/written response to 4 trust statements

V

Acceptance and Usability Questionnaire

Verbal/written response to 17 accept/act statements