ADBOU Transition Analysis
Definition
A Bayesian software framework (Boldsen, Milner et al. 2002) that combines multiple skeletal age indicators with an adjustable prior age distribution to produce a posterior probability distribution over age, providing more statistically defensible estimates than phase-based point conversion.
- Software basis
- Developed by Boldsen, Milner, and colleagues in 2002.
- Works with
- Multiple skeletal indicators used in parallel, rather than one bone feature in isolation.
Common questions
What does ADBOU actually do when estimating age from bones?+
ADBOU is Bayesian software that looks at multiple skeletal features at once, like rib ends and skull sutures in older adults, or pubic bones and ear bones in younger adults. Instead of assigning a single age guess, it calculates the probability that a person was any given age at death, giving you a full range of likely ages.
How is ADBOU different from just using phase charts?+
Phase charts convert bone phases into a single age point that's often not defensible statistically. ADBOU combines multiple indicators with transition parameters derived from real reference data and lets you feed in a prior belief about the person's age. The output is a posterior probability distribution, which is more honest about uncertainty.
What prior age distribution means in ADBOU?+
The prior is your initial best guess about the age range, specified by the user before the bone data is applied. ADBOU then updates this guess using the actual bone data to produce a final, more reliable age estimate.
Related terms
- Auricular Surface
- The ear-shaped articular surface on the medial ilium that participates in the sacroiliac joint; its progressive surface quality changes from fine granularity...
- Buckberry-Chamberlain Five-Trait Composite
- A 2002 revision of the auricular surface method scoring five discrete traits (transverse organisation, texture, microporosity, macroporosity, apical change) summed to a...
- Cranial Suture Closure
- The progressive replacement of fibrous suture tissue by bone along the joints between skull bones; the Meindl-Lovejoy 1985 system scores ten ectocranial...
- Dental Cementum Annulations
- Annual bands in the dental cementum (analogous to tree rings) that can be counted microscopically from a thin tooth section to estimate...
- Ectocranial Scoring
- Assessment of cranial suture closure from the outer surface of the skull; slightly later than endocranial closure and more easily assessable on...
- Igarashi Revision
- A 2005 Japanese revision of the auricular surface method identifying slower degeneration rates in Japanese populations compared to European reference samples, requiring...
- Iscan-Loth Method
- A nine-phase scoring system for the sternal end of the right fourth rib (1984-1985), providing separate male and female reference data for...
- Lovejoy Eight-Phase System
- A holistic scoring system for auricular surface age estimation (Lovejoy 1985) describing progressive surface texture, granularity, porosity, and retroauricular changes from young...
- McKern-Stewart System
- A three-component pubic symphysis scoring system (dorsal plateau, ventral rampart, symphyseal rim) derived from Korean War skeletal remains; effective for young military...
- Meindl-Lovejoy Vault System
- A five-site composite scoring system for ectocranial suture closure at midlambdoid, lambda, obelion, anterior sagittal, and bregma sites, derived from the Hamann-Todd...
- Over-50 Ceiling
- The documented failure of most standard skeletal phase methods to distinguish ages above approximately 50 to 55 years with useful precision; a...
- Phase Compression Error
- The forensic reporting error of presenting a narrower age range than the reference method's documented accuracy supports, often to satisfy investigative demands...
Explained in these topics
- Older-Adult Age from Sternal Rib Ends and Cranial SuturesBayesian software (Boldsen, Milner et al. 2002) that combines multiple skeletal age indicators using transition parameters derived from reference data and a us...
- Young-Adult Age from the Pubic Symphysis and Auricular SurfaceA Bayesian software framework (Boldsen, Milner et al. 2002) that combines multiple skeletal age indicators with an adjustable prior age distribution to produce...