Fig. 2.

Relative treatment effects of different geographical and temporal variables on the presence of aquatic-derived lipids in Incipient and Initial pottery, using a nonparametric multivariate test. Relative treatment effects of treatment “k” is defined as the probability that a randomly chosen subject from treatment “k” displays a higher response than a subject that is randomly chosen from any of the treatment groups, including treatment “k.” The range of possible effect is 0.27–0.73.