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Podcast: Linear Digressions
Episode:

Item Response Theory: how smart ARE you?
Category: Technology
Duration: 00:11:46
Publish Date: 2016-02-07 21:37:58
Description: Psychometrics is all about measuring the psychological characteristics of people; for example, scholastic aptitude. How is this done? Tests, of course! But there's a chicken-and-egg problem here: you need to know both how hard a test is, and how smart the test-taker is, in order to get the results you want. How to solve this problem, one equation with two unknowns? Item response theory--the data science behind such tests and the GRE. Relevant links: https://en.wikipedia.org/wiki/Item_response_theory
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