The 2nd link is to a small study, with n=~10 for each of the sample groups. Small enough that it's hard to take it to say anything too firm on the subject. Th

The 2nd link is to a small study, with n=~10 for each of the sample groups. Small enough that it's hard to take it to say anything too firm on the subject. The 1st one is a meta analysis of similarly small studies. When you've got a meta-analysis of small studies showing an overall small effect size, there's a good chance that the only thing the meta-analysis actually measures is the file drawer effect.