Fig. 6From: Evolution within a language: environmental differences contribute to divergence of dialect groupsSpatial autocorrelation plots for features remaining in the final model of dialect group analysis. Autocorrelation coefficient (r; blue line) as a function of geographical distance for (a) linguistic differences, differences in percentage of (b) farmed area, (c) chimneyless huts, (d) moraine, (e) bedrock and (f) difference in the length of rivers. The 95% confidence intervals calculated with permutation (red lines), and bootstrapped 95% confidence intervals (error bars) are also shownBack to article page