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So, unless I read the abstract wrong, this is identifying age, race, and gender, then making categorical qualifiers based on those distinctions. While using ML to do the facial recognition to distinguish a person's age, race and gender is neat - categorizing their political affiliation with a 72% accuracy rate is fairly nominal, given the tools used by modern parties to garner donations and directed online advertisin…
I only skimmed the paper, so I'm not claiming to know much about it, but one thing to keep in mind here is that a fair coin has a 50% accuracy using the same terminology as the headline. I'm not saying 72% is not an interesting achievement, its just that "you can do about 50% better than random chance" describes my gut feeling about how much you could actually see in someones face.
>The highest predictive power was afforded by head orientation (58%), followed by emotional expression (57%). Liberals tended to face the camera more directly, were more likely to express surprise, and less likely to express disgust.
Emotional expression makes some sense in hindsight but I wouldn't have though that head orientation would correlate. It's interesting to know how we betray ourselves with these minute details of body language.
The article discusses the underlying correlations at work but I think the title is a bit sensationalistic. Would expect more from Nature.
This isn't a study that shows that people's faces indicate their political leanings. It's a study which shows that pictures that people select to represent themselves publicly have features that indicate political leaning.
So if I just assign the majority label to all of the population of a given demographics group, I would get the same result right? i.e., predicting "left" for all minorities under 30. You would also get ~70% accuracy.
This isn't a study that shows that people's faces indicate their political leanings. It's a study which shows that pictures that people select to represent themselves publicly have features that indicate political leaning.
"The dating website sample was provided by a popular dating website in 2017. It contains profile images uploaded by 977,777 users; their location (country); and self-reported political orientation, gender, and age." It doesn't sound like people were consenting/aware that they'll endup on a facial recognition study. But I'm not even surprised dating website would sell their such data