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Updated: Jun 25, 2025

A Practical Guide to Phylogenetics for Nonexperts

A Practical Guide to Phylogenetics for Nonexperts

Published on: February 5, 2014

Gaussian process models for geographic controls in phylogenetic trees.

Frederik Hartmann¹, Gerhard Jäger²

¹Department of Linguistics, University of North Texas, Denton, Texas, 7620, USA.

Open Research Europe

|May 23, 2024

Summary

This summary is machine-generated.

This study introduces a new method to distinguish language evolution from geographical proximity. The approach identifies language contact zones, improving phylogenetic tree accuracy.

Keywords:

Gaussian processes Phylogenetics control for language contact geospatial confounding

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Area of Science:

Computational linguistics
Phylogenetic modeling
Geospatial analysis

Background:

Geographical confounding is a persistent challenge in phylogenetic inference.
Distinguishing common genetic descent from language contact effects is difficult for current models.

Purpose of the Study:

To develop a novel approach for detecting and accounting for geographical biases in phylogenetic inference.
To improve the accuracy of language family tree topologies by addressing spatial effects.

Main Methods:

Introduced a distance-based Gaussian process model incorporating latent phylogenetic distances.
Developed methods to detect potential geographic contact zones.
Quantified the influence of contact zones on tree-level (clade support) and language-level (pairwise distances) metrics.

Main Results:

The proposed approach successfully identifies potential high-contact areas between languages.
The method quantifies the impact of geographical proximity on phylogenetic relationships.
Demonstrated the ability to differentiate between shared ancestry and language contact.

Conclusions:

The Gaussian process approach effectively mitigates geographical confounding in phylogenetic inference.
This method enhances the reliability of reconstructed language histories.
Provides a robust framework for analyzing language contact and its impact on linguistic diversity.