Historical glottometry


GlottogramWelcome to our marama homepage – a project by Alexandre François (CNRS, Paris; ANU) and Siva Kalyan (Australian National University, Canberra).

linkage One aspect of the marama project is the development of Historical Glottometry, a quantitative method meant to deal with the genealogy of language families. Rather than rely on the Tree model, Historical Glottometry takes into account all historical innovations in a given language family (or “linkage”), even when they show overlapping patterns.

For each attested subgroup, the model then helps compute degrees of “cohesiveness” (kappa κ) and of “subgroupiness” (sigma ς). One possible output is a “glottometric diagram” such as the one shown here [left].

To know more, you can visit our HG homepage; or you may read the following references:


Historical Glottometry online analyzer

As of October 2021, you can also try out Historical Glottometry yourself, using your own data. Check out our Historical Glottometry online analyzer, and follow the guidelines to produce your own glottometric results!

Tip: Before you try out the engine with your own data files, we recommend you download the two following files, which should work for a preliminary demonstration:

We suggest you download these two CSV files (Unicode text) on your computer, so you can then upload them in the next couple of screens.

Here is how you can cite our engine:

  • Kalyan, Siva & Alexandre François. 2021. Historical Glottometry online analyzer. The Marama project. ANU, Canberra – CNRS, Paris. https://marama.huma-num.fr/Glotto (accessed: date).
You may also contact us if you wish to receive advice on how to format your historical data for this analysis.