In a 11-year old post I showed that the use of p-value misleads researchers about the conclusion in different ways: model selection, test bias, disregard for the power of the statistical test, disregard for the improved power in meta-analysis.| menghu.substack.com
The Classical Twin Design (CTD) has always been criticized for being oversimplistic, and consistently overestimating heritability estimates due to not accounting for GxE, GxG, rGE and equal environmental effects.| menghu.substack.com
A recent article by Samorodnitsky and co-authored by two renowned censorship champions, namely, Kevin Bird and Rebecca Sear, requests that all published papers that have ever used Lynn & Vanhanen (2006) national IQs (or subsequent, revised version, up to Becker & Lynn,| menghu.substack.com
There are convenient ways researchers can collect IQ scores and correlate the observed scores with measures of self-reported health, socio-economic attainment, personality or political views. In platforms such as Prolific or MTurk, participants make money in their spare time by completing tasks. Designing a test that displays both a high loading on the general factor of intelligence, while avoiding measurement bias and bad quality data from online participants, is quite a challenging task.| menghu.substack.com
The OLS regression is a widely applied technique, and many variants of the classical regression exist.| menghu.substack.com
Orlich & Gifford (2006) published an analysis that shows high correlation between parental income and SAT scores.| menghu.substack.com
While it is well known that free trade promotes prosperity for all, as Krugman explained in his book, a less known theory and yet by far the strongest case for protectionism is the infant industry argument.| menghu.substack.com
After the global financial crisis in 2008-2009, the global debt increased substantially and was mainly driven by governmental and nonfinancial corporate debt.| menghu.substack.com
As reviewed in my previous article, the majority of studies on measurement bias, either on the item- or subtest-level, reached an agreement about the fairness of IQ test.| menghu.substack.com
The most important studies on internal test bias with respect to racial groups in the item-level, subtest-level and construct-level are reviewed. The proposed causes will be discussed. Generally, the most commonly used IQ tests aren’t biased or only minimally biased as to be of no practical value.| menghu.substack.com
