Facebook came under a ton of fire this summer when it revealed that it'd manipulated some peoples' news feeds in an experiment to track mood changes. Well, The Social Network took note and has recently announced it's changing how experiments will be performed and from here on out, Zuck and Co. will give researchers clearer guidelines to follow. Meaning, in part, that if a study drills down on a particular demographic or relates to something its users would consider "deeply personal" (i.e. feelings or moods), before the research begins it has to go through what Facebook CTO Mike Schroepfer calls an advanced review process. That review process will be handled by senior-level employees from the social behemoth's engineering, research, legal and privacy-and-policy teams.