Table 5.
Mean change in each questionnaire across different numbers of questions posed to participants in the random number of questions condition. Instances where the mean is “not available” indicate that the number of participants (n) is 0. Instances where the standard SD is “not available” are due to the number of participants (n) being either 0 or 1.
| Number of questions | Change in distress, mean (SD) | Mood change, mean (SD) | Cognitive change, mean (SD) | Change in STAI-Sa, mean (SD) |
| 1 | 0.67 (0.58) | 0.21 (0.08) | 12.67 (2.08) | 1.33 (4.51) |
| 2 | −1.00 (1.41) | −0.03 (0.04) | 4.50 (0.71) | 4.00 (5.66) |
| 3 | 0.50 (0.71) | 0.08 (0.12) | 11.00 (9.90) | 4.00 (0.00) |
| 4 | 0.00 (—b) | 0.00 (—) | 12.00 (—) | −5.00 (—) |
| 5 | 1.50 (2.12) | 0.10 (0.14) | 18.00 (2.83) | 1.50 (9.19) |
| 6 | 0.50 (0.71) | 0.13 (0.19) | 7.00 (8.49) | 5.00 (8.49) |
| 7 | — | — | — | — |
| 8 | 0.00 (—) | 0.17 (—) | 13.00 (—) | 1.00 (—) |
| 9 | −4.00 (—) | −4.00 (—) | 11.00 (—) | −9.00 (—) |
| 10 | — | — | — | — |
| 11 | 1.00 (—) | 0.83 (—) | 19.00 (—) | 5.00 (—) |
| 12 | 0.50 (0.71) | 0.20 (0.00) | 19.50 (3.54) | 3.50 (3.54) |
| 13 | — | — | — | — |
| 14 | −1.00 (0.00) | −0.33 (0.47) | 16.50 (0.71) | −0.50 (6.36) |
| 15 | — | — | — | — |
| 16 | — | — | — | — |
| 17 | 0.00 (—) | 0.00 (—) | 15.00 (—) | −1.00 (—) |
| 18 | 0.50 (0.71) | 0.21 (0.06) | 15.50 (4.95) | 12.50 (9.19) |
| 19 | 0.00 (—) | 0.00 (—) | 17.00 (—) | 4.00 (—) |
| 20 | — | — | — | — |
| 21 | 0.00 (—) | 0.43 (—) | 20.00 (—) | 2.00 (—) |
aSTAI-S: State–Trait Anxiety Inventory-State.
bNot available.