The reason I detest IQ as our measure of intelligence is that it is pretty good. It would be far better if it was either absolutely amazing or obviously wrong. We can’t afford pretty good. A pretty good metric for cognition which some say is great can be a true social nightmare.
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Replying to @EricRWeinstein
@charlesmurray Just saying "IQ" trivializes what modern cognitive assessments measure. They're EXTREMELY good at measuring what they are designed to measure: verbal vs. nonverbal ability, working memory, processing speed, crystallized vs. fluid reasoning, the "components" of IQ.pic.twitter.com/NS7L4es2rT
2 replies 5 retweets 51 likes -
Replying to @ericozkan1 @charlesmurray
Exactly! So...Let’s talk about processing speed (PSI). How many great minds show radically lower scores on processing? How do we get this broken thing the hell away from kids who score high everywhere else. In my language high dispersion —> IQ design failure. As an example.
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Here’s a pic from
@rjhaier. Processing speed has a 0.66 correlation with g whereas reasoning has 0.96. A proper intelligence test wouldn’t overlook a great mind with low PS and high reasoning etc.pic.twitter.com/KlRIItqjjO
2 replies 8 retweets 45 likes -
Replying to @jasonmpeirce @EricRWeinstein and
Honest question: While working memory and processing speed tend to be fixed, reasoning, spatial ability, and vocabulary are all trainable, so why is g thought to be stable over time?
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Replying to @dratsingnadsat @jasonmpeirce and
do you know what principal component analysis is? or elementary factor analysis? if you trained the subjects (say by drilling vocab) that would show up as a different factor
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Replying to @QuasLacrimas @jasonmpeirce and
Ah ok, so a psychometrician would control for all those things.
2 replies 0 retweets 7 likes
basically - cuz g isn’t like a sum of lots of different ways of being smart, it’s a factor that explains why they covary to get more specific than that, easiest to read about EFA or PCA to grasp the idea
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