Relative force differences between digits during the transportation of the round stones (n = 96), the two flat stones (n = 64), the large stone transported with two hands (n = 32), and all 18 combinations of post sizes and weights (n = 576).

Identified here are the proportion of resample cases more extreme than the difference recorded after 100,000 resamples without replacement (one tail). These values are analogous to a significant ‘P’ value, with significant differences (where cases more extreme than the observed difference are under 5% of the distribution) being highlight in bold. Positive values indicate the digit detailed in the vertical column to have the greater of the comparative forces, while a negative value indicates the digit in the horizontal row to be greater. Results are displayed for both mean and maximum force values.