Table 6 Overall summary of test statistic
From: Psychometric evaluation of the Positive Mental Health (PMH) scale using item response theory
# items | Item-Trait interaction (Overall fit) | Uni-dimensionality t-test | Reliability | Item-Residual | Person-Residual | Item misfit | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Analysis | χ 2 | df | p -value | test (%) | PSI | M | SD | M | SD | Item number | |
Initial | 9 | 72.75 | 45 | 0.01 | 3.31 | 0.90 | -0.32 | 2.57 | -0.37 | 1.23 | 3, 8, 9 |
Final | 8 | 30.34 | 25 | 0.21 | 4.10 | 0.89 | 0.23 | 1.09 | -0.32 | 1.01 | None |