Figure 2.
The horizontal axis shows Questions 1 to 9, and the vertical axis shows Percentage. Content only records 0 per cent at Question 1, 51 per cent at Question 2, 60 per cent at Question 3, 51 per cent at Question 4, 58 per cent at Question 5, 28 per cent at Question 6, 44 per cent at Question 7, 46 per cent at Question 8 and 55 per cent at Question 9. Content plus Confidence records 0 per cent at Question 1, 20 per cent at Question 2, 26 per cent at Question 3, 25 per cent at Question 4, 38 per cent at Question 5, 18 per cent at Question 6, 24 per cent at Question 7, 24 per cent at Question 8 and 21 per cent at Question 9.Percentage of correct responses per tier for the 2-tier items
Source: Authors’ own work