> In figure 2, the authors argue that there is a trend. But the graph seems to show the direct measurements of dependent variables with confidence intervals, and they are all non-significant.
From the Figure 2 caption, I'm pretty sure it's showing standard deviations (of the sample) not 95% confidence intervals (of the mean). Two samples may have overlapping ± 1 s.d. intervals despite having significant different means.
Thanks for catching this, that's even more straight-forward (and arguably less informative, but the best solution would be to have both plots of raw data and marginal effects of course).
From the Figure 2 caption, I'm pretty sure it's showing standard deviations (of the sample) not 95% confidence intervals (of the mean). Two samples may have overlapping ± 1 s.d. intervals despite having significant different means.