I am planning to get a probiotic anyways, wouldn't mind trying out the one that was used in the study.<p>This will be one instance where I would not mind an affiliate link ;-)
This is a great article and study. We see more and more evidence that the human consciousness and decision making is distributed and in more places than the brain. Lots of articles in last 6 months about how our "gut" influences decisions based on bacteria, microbes, and flora.
This study performs a randomized, blinded, placebo-controlled (all good) trial to determine the effect of probiotics using a self-report survey. However, the trial is horribly underpowered [1] (N = 20 per group). There's little reason to believe the differences are true effects, rather than statistical noise.<p>[1] <a href="http://en.wikipedia.org/wiki/Statistical_power" rel="nofollow">http://en.wikipedia.org/wiki/Statistical_power</a>