D-Score for Child Development
Calculate posterior of ability
Median D-score from the default references for the given key
Median of Dutch references
Median of GCDG references
Normalize distribution
Calculate posterior for one item given score, difficulty and prior
Median of phase1 references
Median of preliminary_standards
Calculate Development-for-Age Z-score (DAZ)
Decomposes item names into their four components
D-score for child development
D-score estimation
Get age equivalents of items that have a difficulty estimate
Extract item names
Get a subset of items from the itemtable
Get labels for items
Get D-score reference
Obtain difficulty parameters from item bank
Rename items from gcdg into gsed lexicon
Sorts item names according to user-specified priority
The D-score summarizes the child's performance on a set of milestones into a single number. The package implements four Rasch model keys to convert milestone scores into a D-score. It provides tools to calculate the D-score and its precision from the child's milestone scores, to convert the D-score into the Development-for-Age Z-score (DAZ) using age-conditional references, and to map milestone names into a generic 9-position item naming convention.
Useful links