Table 1.
Evaluation of learning effect: proportion of correct decisions related to type of display and order in which the displays were presented to participants
| Test order | % (95% CI) of correct decisions
|
||||
|---|---|---|---|---|---|
| Table | Pie chart | Bar graph | Icon | Overall value for test order* | |
| 1 | 40 (12 to 74) | 56 (21 to 86) | 62 (24 to 91) | 86 (42 to 99) | 59 (41 to 75) |
| 2 | 86 (42 to 99) | 40 (12 to 74) | 67 (30 to 93) | 75 (35 to 97) | 65 (47 to 80) |
| 3 | 62 (24 to 91) | 71 (29 to 96) | 50 (19 to 81) | 89 (52 to 99) | 68 (49 to 83) |
| 4 | 89 (52 to 99) | 62 (24 to 91) | 43 (10 to 82) | 80 (44 to 97) | 70 (53 to 85) |
| Overall value for display† | 68 (49 to 83) | 56 (38 to 73) | 56 (38 to 73) | 82 (65 to 93) | |
*
χ2 statistic for overall value for test order: χ32=1.14; P=0.7679.
†
Q statistic for overall value for display: χ32=8.76; P=0.0326 (Cochran’s Q statistic). Icon v table: P=0.1655. Icon v pie chart or bar graph: P=0.0290 (McNemar test).