I posted this in the 2016 election thread. It's all about privacy and compartmentalisation though ... or the lack thereof.
Trump Knows You Better Than You Know Yourself | aNtiDoTe Zine
Quote:
Kosinski and his team continued, tirelessly refining their models. In 2012, Kosinski demonstrated that from a mere 68 Facebook likes on average, a lot about a user could be reliably predicted: skin color (95% accuracy), sexual orientation (88% accuracy), Democrat or Republican (85%). But there’s more: level of intellect; religious affiliation; alcohol-, cigarette-, and drug abuse could all be calculated. Even whether or not your parents were divorced could be teased out of the data.
The strength of the model depended on how well it could predict a test subject’s answers. Kosinski kept working at it. Soon, with a mere ten “likes” as input his model could appraise a person’s character better than an average coworker. With seventy, it could “know” a subject better than a friend; with 150 likes, better than their parents. With 300 likes, Kosinski’s model could predict a subject’s answers better than their partner. With even more likes it could exceed what a person thinks they know about themselves.
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