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Great post. Thought this was interesting from the Schmidt & Hunter article:

"This meta-analysis found that the validity of GMA for predicting job performance was .58 for professional managerial jobs, .56 for high level complex technical jobs, .51 for medium complexity jobs, .40 for semi-skilled jobs, and .23 for completely unskilled jobs."

Apparently having a high IQ is a better predictor of being a good business guy than a good hacker.



> Apparently having a high IQ is a better predictor of being a good business guy than a good hacker.

By a very tiny margin. I'd have to dig to accurately say whether it's statistically significant, but I assume it's not.

(Assuming you refer to the high/medium level complex technical jobs with .56 and .51 versus the manager's .58)


Take any "meta-analysis" with a large grain of salt (or better yet, and industrial size vat of salt).

Meta-analysis suggests that men under the age of 26 have a 60% chance of being sex offenders. This same type of meta-analysis is also the reason that all sex crime offenders (including drunk people pissing in a park and amorous couples getting it on in a dark parkin glot) are lumped together for sex offender registration purposes, because the meta-analysis suggests that the recidivism rate for "sex offenders" (regardless of actual offense) is greater than 90% (without regard to the actual recidivist offense).

TLDR: Meta-analysis can be used to support any claim.


Would you care to elaborate on what, specifically, is flawed about meta analysis? I'd definitely be interested in a source on that 60% number and how that source arrived at a number that seems, on it's face, so incorrect.


"I'd definitely be interested in a source on that 60% number and how that source arrived at a number that seems, on it's face, so incorrect."

I'd be curious to see if anyone has actually done a study on this, but to me this number actually seems quite low. I would guess that it would easily be 90+%.


Being prepared to do GMA style tests correlates with business guys.

Telling the interviewer to go XXXX himself and starting your own company correlates with good tech guys




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