User talk:Hisana456/@comment-4475299-20131003123851/@comment-4475299-20131007134150

Just that I understand that psichological explanations are extremely difficult to test. Ethical and cost issues often prevent from using more than a few tens of subjects (when hundreds or thousands would give an additional confidence level), and it is difficult to take into account misunderstandings, lies, lack of collaboration, and so on.

Just to quote two possible objections that come to my mind. But, as I told you, I've never been interested enough in it to say this with any level of confidence.