Children learn to walk, speak, and think at an astonishing pace. The D-score presents a unified framework that places children and their developmental milestones from different tools onto the same scale, enabling comparisons in child development across populations, groups and individuals. This pioneering text explains why we need the D-score, how we construct it, and how we calculate it. It will be of interest not just to professionals in child development, but also to policymakers in international settings and to data scientists.
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Preface – Maureen Black
1. Child development with the D-score: Turning milestones into measurements - Stef van Buuren and Iris Eekhout
1.1 Introduction – with Marianne de Wolff
1.2 Short history
1.3 Quantifying child development
1.4 The D-score
1.8 Precision – with Manon Grevinga
1.9 Three studies – with Paula van Dommelen and Maria C. Olthof
1.10 Next steps
2. Child development with the D-score: Tuning instruments to unity - Iris Eekhout and Stef van Buuren
2.4. Equate groups
2.5. Modelling equates
2.6. Comparing ability
2.7. Application I: Tracking a sustainable development goal
2.8. Application II: Who is on-track?