I think you're correct, but in general I'm not sure what the implications are
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Replying to @HbdNrx @RCornwalling and
"it needs to be stressed that if the bell-shaped curve is the myth it seems to be for these traits, then the model used in behavioral genetics is already suspect, the statistics are inappropriate, and estimates for causes of variation may be seriously wrong." Richardson 2017: 45
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Replying to @HbdNrx @RCornwalling and
"estimates for causes of variation being seriously wrong" isn't vague though. Because if they don't fall on normal distribution, then many of the conclusions drawn from the results are wrong.
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Replying to @Race__Realist @RaceRealist88 and
Which conclusions and how wrong?
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Replying to @HbdNrx @RCornwalling and
X amount of people have Y IQ would be wrong if there is no normal curve, for instance.
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Replying to @Race__Realist @RaceRealist88 and
Nobody expects these estimates to be perfect
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Replying to @HbdNrx @RCornwalling and
Well they're horribly flawed as I've shown.
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Replying to @Race__Realist @RaceRealist88 and
Slightly off at the edges doesn't necessarily concern me that much
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Replying to @HbdNrx @RCornwalling and
It has implications for the whole so-called curve, not only at the edges. That was only an example.
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Wake me up when you have specific examples of things that aren't working
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Replying to @HbdNrx @RCornwalling and
I just did... The stats are 'inappropriate' because they don't fall on a normal curve. Hell, even reaction time, one of the oft-touted IQ correlates isn't normally distributed (never mind the fact that it's not a good correlate of g in the first place.
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