Really? Do you even know the study I'm talking about?
This metadata analysis raises questions about experimental design in past studies. If you're familiar with the leading e-collar study, which I've discussed here before, you'll be aware that there are questions as to how the researchers interpreted salivary cortisol and why they found it significant in one context but ignored it in another, and (frankly) whether the data used to make its findings was perhaps collected only after the authors' initial design failed to find the desired result. The points raised in this paper tend to validate those concerns.
This paper is doubly significant if you know who the lead author is. Do you?