Problems in Erickson et al. 2009

  1. Figure 1

    Figure 1
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    Figure 1

    A plot of Erickson et al.'s best fit equation, given in the caption of Figure 6 in Erickson et al. 2009, as well as the published and recovered data sets and two of my regression attempts, overlaid on top of the suspect figure. Erickson et al.'s best fit curve according to the caption published with Figure 6 matches neither the plotted best fit curve nor any of my attempted regressions. The recovered data set which I used in my reanalysis, plotted as yellow points, shows close correspondence with the data set as plotted. Comparing the published data set with the recovered data set, it is clear that many of the original data points were not plotted in the published figure, and others appear to have been plotted inaccurately. The source of the data set as published, the best fit regression curve, and the regression curve as plotted are unknown.