Resources
Everything the book points to, in one place.
- MML preprintMeasurement Maturity Levels (MML): grading the measurement readiness of psychological constructs. PsyArXiv, August 2026
- Supplementary Table S1The construct-by-construct MML classification of all 343 elements (Excel)
- The Passport LibraryFull passports for all 343 elements
- The Parking LotThe living list of candidates for future versions
- The Validation ProgramThe six cross-layer chains under test
- Book preview (PDF)
- One-page HES summary (PDF)