Evidence & Sources
Our developmental intelligence draws on three categories of evidence — each with a distinct role in how we derive milestone windows, confidence scores, and curriculum alignment.
10
normative studies
381k+
children with response data
66
countries represented
3
clinical instruments
2
curriculum frameworks
Normative Research
Large-scale population studies that define what is developmentally typical across diverse global contexts. These are the backbone of our age-window predictions and confidence scores — they tell us what most children can do, and when.
Stanford SHQ
Stanford University · 2021
- Sample
- 21.9k+
- Countries
- 1
- Milestones covered
- 422
Ages birth–6yr
WHO GSED
World Health Organization · 2023
- Sample
- —
- Countries
- 9
- Milestones covered
- 153
Ages birth–3yr
WHO MGRS
World Health Organization · 2006
- Sample
- 8.5k+
- Countries
- 6
- Milestones covered
- 6
Ages birth–5yr
CREDI
Harvard Center on the Developing Child · 2020
- Sample
- 14.1k+
- Countries
- 17
- Milestones covered
- 108
Ages birth–3yr
MELQO
UNESCO / UNICEF · 2017
- Sample
- —
- Countries
- 12
- Milestones covered
- 30
Ages 4yr–6yr
ECDI 2030
UNICEF · 2020
- Sample
- —
- Countries
- —
- Milestones covered
- 8
Ages 2yr–4yr 11mo
MICS6
UNICEF · 2019
- Sample
- 335.2k+
- Countries
- 66
- Milestones covered
- —
Ages 2yr–4yr 11mo
IDB Bogota
Inter-American Development Bank · 2020
- Sample
- 1.3k+
- Countries
- 1
- Milestones covered
- —
Ages birth–3yr
Japan MHLW
Japan Ministry of Health, Labour and Welfare · 2020
- Sample
- —
- Countries
- 1
- Milestones covered
- —
Ages birth–5yr
HK FHS
Department of Health, Hong Kong SAR · 2018
- Sample
- —
- Countries
- 1
- Milestones covered
- —
Ages birth–6yr
Clinical Assessment Instruments
Validated tools used by paediatricians, developmental specialists, and early childhood practitioners to evaluate individual children against established norms. We map their assessment constructs to our canonical milestones to validate coverage and enable cross-instrument comparison.
Denver II
Denver Developmental Materials, Inc. · 1990
- Sample
- —
- Countries
- 1
- Milestones covered
- 38
Ages birth–6yr
ASQ-3
Brookes Publishing · 2009
- Sample
- —
- Countries
- 1
- Milestones covered
- 22
Ages 1mo–5yr 6mo
Bayley-4
Pearson Clinical Assessment · 2019
- Sample
- —
- Countries
- 1
- Milestones covered
- 30
Ages birth–3yr 6mo
Curriculum Frameworks
National and institutional learning standards from governments and educational bodies worldwide. We use them to align our curriculum skills across cultures and to map what practitioners expect children to learn, not just observe developmentally.