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Table 1 Factors and patterns studied, and the evolutionary processes inducing linguistic divergence

From: Evolution within a language: environmental differences contribute to divergence of dialect groups

  Dialect groups Municipal dialects
Studied factors
 Geographical distance x x
 Environmental differences x x
 Cultural differences x x
 Difference in administrative history   x
Studied patterns
 IBD x x
 IBE x x
 IBC x x
 IBA   x
Evolutionary processes
 IBD – neutral x  
 IBE – adaptive x  
  1. Evolutionary processes were inferred from the studied patterns. Environmental and cultural factors include several different variables (Additional file 1: Table S1). Administrative history is a compilation of 16 sets of administrative borders from different historical times