Testing accuracy in 2D and 3D geometric morphometric methods for cut mark identification and classification.

Area of Science:

• Paleoanthropology
• Taphonomy
• Zooarchaeology

Background:

• Bone surface modifications (BSMs) are vital for interpreting fossil records and hominin behavior.
• Microscopic analysis has improved BSM discrimination, but reliability and specific applications, especially for cut marks, remain debated.
• Various 2D and 3D geometric morphometric methods exist for analyzing cut marks, leading to competing approaches.

Purpose of the Study:

• To critically evaluate and compare the accuracy of 2D and 3D geometric morphometric methods for classifying cut marks.
• To empirically test whether advanced 3D methods offer superior resolution compared to 2D methods in BSM analysis.

Main Methods:

• Comparative analysis of existing experimental data on bone surface modifications.
• Application of both 2D and 3D geometric morphometric techniques to classify cut marks.
• Statistical evaluation of classification accuracy between the two methodological approaches.

Main Results:

• Both 2D and 3D methods demonstrated equal validity in the interpretation and classification of cut marks.
• The study found no significant improvement in accuracy when employing sophisticated 3D methods over 2D approaches.
• Results challenge the assumption that increased methodological complexity directly translates to enhanced analytical resolution.

Conclusions:

• 2D and 3D geometric morphometric methods are equally effective for analyzing cut marks in paleoanthropological research.
• The adoption of advanced 3D techniques does not inherently improve the accuracy of cut mark interpretation.
• Future research should focus on empirical validation rather than solely on technological sophistication for BSM analysis.