The Weighted Average Method 'WAM' for Dental Age Estimation: A simpler method for children at the 10 year threshold: It is vain to do with more when less will suffice" William of Ockham 1288-1358

Graham J. Roberts*, Fraser McDonald, Monica Neil, Victoria S. Lucas

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)


    The mathematical principle of weighting averages to determine the most appropriate numerical outcome is well established in economic and social studies. It has seen little application in forensic dentistry. This study re-evaluated the data from a previous study of age assessment at the 10 year threshold. A semiautomatic process of weighting averages by n-td, x-tds, sd-tds, se-tds, 1/sd-tds, 1/se-tds was prepared in an Excel worksheet and the different weighted mean values reported. In addition the Fixed Effects and Random Effects models for Meta-Analysis were used and applied to the same data sets. In conclusion it has been shown that the most accurate age estimation method is to use the Random Effects Model for the mathematical procedures.

    Original languageEnglish
    Pages (from-to)56-60
    Number of pages5
    JournalJournal Of Forensic And Legal Medicine
    Publication statusPublished - 1 Jan 2014


    • Dental Age Assessment
    • Dental Age Estimation
    • Meta-analysis
    • Method comparison
    • Weighted average

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