Nowizard
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This is just one of the theories :) I myself am a psychologist (well, I'm studying to be one), and I know very well how much confusion there is in this science! Almost no question has a definitive answer... So, it's not worth taking this result as the absolute truth.
What should be done is to ask the question, how did the scientists measure this?
Not entirely, of course, but I agree with the agileist.
Бог есть любовь