Figure 3

Scan success rates when using the bar code entry system during the tutorial/practice (T), first round of bar code entry (BCE1) and second round of bar code entry (BCE2). A) Mean and standard deviation of first scan success rate expressed as a % of the questions answered across participants (n = 24). B) Mean and standard deviation of second scan success rate for unsuccessful first scan (expressed as a % of the questions answered) across participants (n = 24).