Table 2.
Pilot study |
Replication |
||||||||
---|---|---|---|---|---|---|---|---|---|
Item | C1 z | C2 z | d | C1 z | C2 z | d | C3 z | C4 z | d |
(3) Attrition | 0.449 | 1.696∗∗ | 1.587 | 0.767 | 0.683 | 1.289 | 0.683 | 0.757 | 1.633 |
(4) Attrition between | 0.77 | 0.873 | 2.31 | 0.667 | 0.536 | 2.799 | 0.49 | 0.595 | 2.244 |
(5) Exclusions after | 1.335 | 0.57 | 0.692 | 0.451 | 0.513 | 2.974 | 0.38 | 0.506 | 2.974 |
(6) Follow-up | 1.661∗∗ | 1.919∗∗ | 1.768 | 1.639∗∗ | 1.478∗ | 2.276 | 1.532∗ | 1.478∗ | 1.742 |
Items appear in abbreviated form; the whole and final version (after including improvements derived from the pilot study) can be consulted in the Appendix. C1–C4 = coder 1–4, respectively. z = Kolmogorov–Smirnov z to study normality assumption (accepted when p > 0.05). d = Durbin–Watson d to study independence of errors assumption (accepted when 1.5 < d < 2.5). Results that imply an assumption violation are in boldface.
∗p < 0.05; ∗∗p < 0.01.