The D-score
Section 2 provided historical background on the nature of child development. Section 3 discussed three general quantification approaches. This section explains how to apply the unit-based approach to arrive at the D-score scale. The text illustrates the process with real data.
- Dutch Development Instrument (DDI) (4.1)
- Milestone passing by age and by D-score (4.2, 4.3)
- How do age and D-score relate? (4.4)
- Role of the measurement model (4.5)
- Item and person response functions (4.6)
- Engelhard invariance criteria (4.7)
- Why the Rasch model? (4.8)