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by steven-xu
1191 days ago
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Berkson's paradox[1] is a useful lens to analyze inverse correlation. The pool of people doing interview prep are either smart or determined (to accumulate certifications) or both, but dumb and lazy people don't enter the pool, and an inverse correlation applies. Similarly, if an interview bar evaluates candidates though a combination of soft and hard skills and rejects those who lack both, even if soft and hard skills are independently distributed (or positively correlated with insufficient strength), soft and hard skills will appear to be inversely correlated. Certs could be neutrally or even positively correlated with interview performance, but by pre-filtering the population, the opposite phenomenon arises. [1] - https://en.wikipedia.org/wiki/Berkson%27s_paradox |
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