I have a feeling a lot of college courses on research methods are going to use this as an example of a grave ethics breach for years to come. With an experiment group as large as they used, statistically it's almost inevitable that someone in that group will commit suicide in the near future. If that person is in the group that was targeted for negative messages, even a rookie lawyer could make a sound case before a jury that Facebook's researchers have blood on their hands.
surely people have committed sucide after using facebook even without this study. is facebook guilty of that, too?
you may argue that facebook was "trying to make people depressed" but that simply isn't true. what if showing more of my friends negative status updates actually _helps_ them? depressed people are shunned in our society; facebook gave a voice to the voiceless. that's wonderful!
> you may argue that facebook was "trying to make people depressed" but that simply isn't true.
Legal culpability issues aside: did facebook manipulate people's emotions intentionally? Did they inform them that they were going to do this, and of the risks involved? Did they get their consent? If the answers to the last two questions aren't unequivocally yes, then facebook is in deep trouble.
Edit: this also misses the problem that the subjects were never screened for their basical ability to give informed consent. Merely clicking through the ToS does not mean that you're not suffering from a mental illness that nullifies their agreement to the ToS.
Lastly, this experiment clearly involved deception, since the test subjects weren't informed up-front that they were being manipulated. This is problematic[1] if the subjects weren't debriefed after the study:
>It is stated in the Ethical Principles of Psychologists and Code of Conduct set by the American Psychological Association, that psychologists may not conduct research that includes a deceptive compartment unless the act is justified by the value and the importance of the results of such study, provided that this could not be obtained in an alternative way. Moreover, the research should bear no potential harm to the subject as an outcome of deception, be it physical pain or emotional distress. Finally, a debriefing session is required in which the experimenter discloses to the subject the use of deception in the research he/she was part of and provides the subject with the option of withdrawing his/her data.