Reference

Package documentation Overview of functions in the dscore package.
dscore-package	D-score for child development
Identify whether your milestones are supported Functions to identify supported milestones and instruments.
get_itemnames()	Extract item names
get_itemtable()	Get a subset of items from the itemtable
get_labels()	Get labels for items
decompose_itemnames()	Decomposes item names into their four components
Get your data into shape Functions for mapping and recoding your data in a format that the dscore() function can understand.
rename_gcdg_gsed()	Rename items from gcdg into gsed lexicon
sort_itemnames() order_itemnames()	Sorts item names according to user-specified priority
Calculate D-score and DAZ The main workhorse implements the algorithms to calculate the D-score and the DAZ from 1) the child’s milestone scores, 2) the itembank, 3) the prior and 4) the reference.
dscore() dscore_posterior()	D-score estimation
calculate_posterior()	Calculate posterior of ability
get_tau()	Obtain difficulty parameters from item bank
Working with references Specification of the models can be made more convenient using the following set of helpers.
daz() zad()	Calculate Development-for-Age Z-score (DAZ)
get_reference()	Get D-score reference
get_age_equivalent()	Get age equivalents of items that have a difficulty estimate
get_mu()	Median D-score from the base population for a given key
Internal functions For research purposes only.
count_mu()	Median D-score from the default references for the given key
count_mu_dutch()	Median of Dutch references
count_mu_gcdg()	Median of GCDG references
count_mu_phase1()	Median of phase1 references
count_mu_preliminary_standards()	Median of preliminary_standards
posterior()	Calculate posterior for one item given score, difficulty and prior
normalize()	Normalize distribution
Datasets Built-in datasets
builtin_keys	Available keys for calculating the D-score
builtin_itembank	Collection of items fitting the Rasch model
builtin_itemtable	Collection of items from instruments measuring early child development
builtin_references	Collection of age-conditional reference distributions
milestones	Outcomes on developmental milestones for preterm-born children
gsample	Sample of 10 children from the GSED Phase 1 study
sample_sf	Sample of 10 children from gpa (SF)
sample_lf	Sample of 10 children from gto (LF)
sample_hf	Sample of 10 children from GSED HF