Study almost convincingly shows that people with a variety of issues self-select into Mensa. http://www.sciencedirect.com/science/article/pii/S0160289616303324 …pic.twitter.com/oV9eZFkhjo
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Granted, this assumes linearity and may not handle the tails very well.
Loneliness effects are further out than mere 2 z. 3-4 z they get bad, depending on interests. Confirmed in SMPY.
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