Monday, September 18, 2023

Here's how General Motors' CEO Mary Barra justifies her $29 million salary | The Navy SEALs' Secret of Exceptional Endurance | Opposites Don't Attract: Why Couples Are So Alike

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NUS School of Computing - Analytics from Data to Insights Programme


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Opposites Don't Attract: Why Couples Are So Alike - Time   

We all know couples who, on the surface at least, seem incompatible. One person is an introvert, the other an extravert; one likes fine wine, the other never drinks; one is deeply religious, the other doesn’t believe. It’s those pairs who give rise to the idea that opposites attract. But that notion appears to be mistaken. According to a new study in the journal Nature Human Behavior, most partners tend to be profoundly similar—sharing up to 89% of the traits the researchers analyzed, including not just religiosity, alcohol consumption and introversion or extraversion, but also political values, IQ, level of education, openness to new experiences, susceptibility to depression, age at which each partner became sexually active, and more.

The sample group the researchers surveyed was both wide and deep. First, they conducted a meta-analysis of 22 traits couples may or may not share which were studied in 199 published papers going back as far as 1903. Collectively, those papers contained information on 8.5 million people. Next, they turned to the UK Biobank, a British data bank that contains the genetic, health and behavioral information of over half a million U.K. residents who volunteered to contribute to the project. The researchers used information from nearly 80,000 of those volunteers, surveying them for 133 traits, such as substance use and level of education. (In this paper, all of the people studied were male-female pairs. The authors are currently at work on a new paper on same-sex couples that they hope to publish next year.)

The metric the investigators used to crunch the numbers they got from the biobank and the meta-analysis uses what are known as 95% confidence intervals, a statistical tool that allows researchers to conclude with 95% certainty that a particular fact they’re seeking is true. The authors of the paper plotted their results on a scale that ran from 1.0 at the top, down to -0.5 at the bottom, with 1.0 representing perfect convergence (all of the people studied had a particular trait in common with their partner) and -0.5 representing perfect non-convergence (none of the couples did). Zero, which lies between the 1.0 and the -0.5 represents randomness, with no particular correlation one way or the other.

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