Package: dscore 2.1.0

Stef van Buuren

dscore: D-Score for Child Development

The D-score summarizes a child's performance on developmental milestones into a single number. Its key feature is its generic nature. The method does not depend on a specific measurement instrument. The statistical method underlying the D-score is described in van Buuren et al. (2025) <doi:10.1177/01650254241294033>. This package implements model keys to convert milestone scores to D-scores; maps instrument-specific item names to a generic 9-position naming convention; computes D-scores and their precision from a child's milestone scores; and converts D-scores to Development-for-Age Z-scores (DAZ) using age-conditional reference standards.

Authors:Stef van Buuren [cre, aut], Iris Eekhout [aut], Arjan Huizing [aut], Jonathan Seiden [aut]

dscore_2.1.0.tar.gz
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manual.pdf |manual.html
card.svg |card.png
dscore/json (API)
NEWS

# Install 'dscore' in R:
install.packages('dscore', repos = c('https://d-score.r-universe.dev', 'https://cloud.r-project.org'))

Bug tracker:https://github.com/d-score/dscore/issues

Pkgdown/docs site:https://d-score.org

Uses libs:
  • c++– GNU Standard C++ Library v3
Datasets:

On CRAN:

Conda:

child-developmentd-scoredazdevelopmental-trajectoriesgrowth-chartsrasch-modelcpp

6.80 score 9 stars 70 scripts 356 downloads 18 exports 22 dependencies

Last updated from:c944054905. Checks:13 OK. Indexed: yes.

TargetResultTimeFilesSyslog
linux-devel-arm64OK162
linux-devel-x86_64OK158
source / vignettesOK253
linux-release-arm64OK155
linux-release-x86_64OK151
macos-release-arm64OK178
macos-release-x86_64OK280
macos-oldrel-arm64OK202
macos-oldrel-x86_64OK304
windows-develOK173
windows-releaseOK117
windows-oldrelOK116
wasm-releaseOK151

Exports:count_mudazddomaindecompose_itemnamesdscoredscore_posteriorget_age_equivalentget_itemnamesget_itemtableget_labelsget_muget_referenceget_tauorder_itemnamesrename_gcdg_gsedrename_vectorsort_itemnameszad

Dependencies:clicpp11dplyrgenericsgluelifecyclemagrittrpillarpkgconfigpurrrR6RcppRcppArmadillorlangstringistringrtibbletidyrtidyselectutf8vctrswithr

Custom Priors (Advanced)

Rendered fromcustom_priors.Rmdusingknitr::rmarkdownon May 22 2026.

Last update: 2025-12-08
Started: 2025-12-08

Getting started

Rendered fromgetting_started.Rmdusingknitr::rmarkdownon May 22 2026.

Last update: 2025-12-08
Started: 2023-01-19

Multiple keys (Advanced)

Rendered frommultiple_keys.Rmdusingknitr::rmarkdownon May 22 2026.

Last update: 2025-12-08
Started: 2025-12-08

Scoring GSED

Rendered fromscoring_GSED.Rmdusingknitr::rmarkdownon May 22 2026.

Last update: 2026-01-08
Started: 2023-01-19

Understanding and using DAZ

Rendered fromusing_DAZ.Rmdusingknitr::rmarkdownon May 22 2026.

Last update: 2025-12-08
Started: 2025-12-08

Readme and manuals

Help Manual

Help pageTopics
Developmental domain for itemsbuiltin_domaintable
Collection of items fitting the Rasch modelbuiltin_itembank
Collection of items from instruments measuring early child developmentbuiltin_itemtable
Available keys for calculating the D-scorebuiltin_keys
Collection of age-conditional reference distributionsbuiltin_references
A table to translate between different lexicons (naming schema)builtin_translate
Calculate posterior of abilitycalculate_posterior
Median D-score from the default references for the given keycount_mu
Median of Dutch referencescount_mu_dutch
Median of GCDG referencescount_mu_gcdg
Median of phase1 referencescount_mu_phase1
Median of preliminary_standardscount_mu_preliminary_standards
Calculate Development-for-Age Z-score (DAZ)daz zad
Domain specific D-scoreddomain
Decomposes item names into their four componentsdecompose_itemnames
D-score estimationdscore dscore_posterior
Get age equivalents of items that have a difficulty estimateget_age_equivalent
Extract item namesget_itemnames
Get a subset of items from the itemtableget_itemtable
Get labels for itemsget_labels
Median D-score from the base population for a given keyget_mu
Median D-score from GSED cohortsget_mu_gsed_cohorts
Get D-score referenceget_reference
Obtain difficulty parameters from item bankget_tau
Sample of 10 children from the GSED Phase 1 studygsample
Outcomes on developmental milestones for preterm-born childrenmilestones
Normalize distributionnormalize
Calculate posterior for one item given score, difficulty and priorposterior
Rename items from gcdg into gsed lexiconrename_gcdg_gsed
Rename character vectorrename_vector
Sample of 10 children from GSED HFsample_hf
Sample of 10 children from gto (LF)sample_lf
Sample of 10 children from gpa (SF)sample_sf
Sorts item names according to user-specified priorityorder_itemnames sort_itemnames
Sample of 50 children measured with three instrumentstriple