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I think the idea is to "learn" with human assistance and then use the "intelligence" to classify other individuals without having to ask them.

I interpret the issue k-mcgrady brings up as the inconsistency inherent to self-assessing issues like these.

Standardized assessment has its issues (it doesn't replace a professional), but at least it works with a single definition that doesn't rely on calibrating each participant's understanding of depression. People struggling with depression often fail to recognize or be willing to admit it, and the opposite can be true as well.

By testing against participant answers, this study is actually determining if your photos correlate with saying you're depressed, which is a different and less predictable thing.

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