Table 1 Overall fit statistics in two random samples (n = 800 each) drawn from the Swedish Midwife Survey
Item residual | Person residual | Chi square | Unidimensionality | ||||||
|---|---|---|---|---|---|---|---|---|---|
Analysis name | Mean | SD | Mean | SD | Value | p | PSI | Test % (95% CI) | Alpha |
Sample 1 n = 800 | |||||||||
BAT 23 items | -0.22 | 2.94 | -0.33 | 1.43 | 454.96 | < 0.0001 | 0.94 | 20.73 (18.05;23.68) | 0.94 |
BAT 4 testlets | -0.02 | 2.13 | -0.34 | 0.87 | 44.53 | 0.16 | 0.84 | 5.40 (4.02;7.21) | 0.81 |
Sample 2 n = 800 | |||||||||
BAT 23 items | -0.10 | 3.13 | -0.34 | 1.45 | 489.15 | < 0.0001 | 0.94 | 21.15 (18.46;24.12) | 0.94 |
BAT 4 testlets | 0.08 | 2.01 | -0.36 | 0.93 | 35.34 | 0.50 | 0.85 | 4.88 (3.58;6.61) | 0.81 |