Non parametric IRT analysis | Fit of a PCM for the complete sample (n=26388) | Fit of a PCM for a fixed, moderate sample size (n=500) | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
H | Min(Hj) | Min(Hjk) | Max(CritM) | χ2 | df | P | χ2 | df | p | |
General Health | 0.49* | 0.40* | 0.31* | −5 | 1320.42 | 81 | <0.0001 | 39.36 | 81 | 0.99 |
Physical Functioning | 0.76* | 0.72* | 0.66* | −21 | 3895.46 | 94 | <0.0001 | 103.64 | 94 | 0.23 |
Mental Health | 0.57* | 0.50* | 0.33* | −10 | 2808.10 | 81 | <0.0001 | 55.95 | 81 | 0.98 |