[ Enter the Past ] Vienna - Austria, 8-12 April 2003
 
ID_person: 44
ID-paper: 41
 

J. A. Barceló, J. Pijoan-López

 
Neural Networks for statistical hypothesis testing
 

Neural networks are not a very usual item in the archaeologist toolbox. They have the reputation of being powerful methods of data generalisation, but computationally slow and mathematically very complex. However, the availability of new software minimize those problems, and allow the use of neural networks to many other problems. In this paper, we apply supervised neural networks (Backprop. learning algorithm) to the classical problem of statistical hypothesis testing. Processing experimental use wear in lithics we have found some contra intuitive results using standard tests (chi-square, Cramer's V, Student's t, ANOVA), which can be solved using the non-linear discriminant power of Neural Networks. Specifically when archaeological data do not fit parametric distributions, Supervised Learning algorithms appear as an alternative approach. Our particular case study is a set of digital images of experimental data showing use wear as a result of work actions. We have used experimental data in order to find similarities between use wear identified in archaeological data and use wear whose origin is well known from experimental results. Previous studies shown that there is not an single discrimination rule to associate cause (kynematics, worked material) and effect (use wear), because of the stochastic nature of this phenomenon. Our paper shows that Neural Networks can be an optimal method to classify archaeological tools based on use wear

[gor]13-02-2003