Tests | Behaviour sample | | Ordinary sample | |
---|
PS (GLLRM)a | LPS (RM) | PS (GLLRM)b | LPS (GLLRM)c |
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CLR | df | p | CLR | df | P | CLR | Df | p | CLR | df | p |
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Global homogeneity | 5.0 | 10 | .89 | 8.1 | 6 | .23 | 17.2 | 11 | .10 | 1.8 | 8 | .99 |
DIF relative to: |
Children age group | 27.2 | 20 | .13 | 8.5 | 12 | .74 | 25.2 | 16 | .07 | 26.2 | 16 | .05 |
Parent | 16.8 | 10 | .08 | 3.3 | 6 | .77 | 7.1 | 11 | .80 | 4.0 | 8 | .85 |
Parent education | 6.6 | 6 | .36 | 2.6 | 6 | .85 | 23.3 | 11 | .02+ | 11.3 | 8 | .18 |
Parent age groups | 31.1 | 20 | .05 | 14.3 | 12 | .29 | 24.5 | 22 | .32 | 19.1 | 16 | .26 |
- Notes. PS Parental stress, LPS Lack of parental satisfaction, RM Rasch model, GLLRM Graphical loglinear Rasch model, CLR Conditional likelihood ratio, df degrees of freedom, p p-value, DIF differential item function
- Global homogeneity test compares items parameters in approximately equal-sized groups of high and low scoring parents
- + The critical 5% limit for the p-values after adjusting for FDR was p = .0100
- aThe GLLRM for the PS scale assumed that item 15 and 16 functions differentially relative to parent educational level
- bThe GLLRM for the PS scale assumed that items 3 and 4 are locally dependent, and that item 4 functions differentially relative to child age
- cThe GLLRM for the LPS subscale assumed that items 1 and 6, and item 1 and 17 are locally dependent