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. 2017 Feb 15;17:53. doi: 10.1186/s12862-017-0898-y

Fig. 4.

Fig. 4

Schematic representation of the analysis conducted to quantify the frequency of strong shifts in the p-values (i.e. directional biases) derived from the use of polytomic chronograms (P2) and pseudo-chronograms (P3) instead of the “true” chronograms (P1)