Intention strength

Intention strength was assessed prior to randomization and again after exposure to the infographic. Intention strength was measured using three items adapted from previous studies (Cooke & Sheeran, 2013; Sheeran et al., 2017; Sheeran & Orbell, 2000): ‘I intend to go for cervical screening when I am next invited’, ‘I will try to go for cervical screening when I am next invited’ and ‘I am going to go for cervical screening when I am next invited’ (using a 7‐point Likert scale, from strongly disagree to strongly agree). These items were used to create a mean intention strength score (giving a range of 1–7). Internal reliability was very high for the three intention items at both time points (Cronbach's alpha = .94–95).