The Reddit Brain

The Reddit Brain is an interactive data story about online communities seen through a neuroscience-inspired lens. Instead of treating Reddit as a flat collection of forums, the project models subreddits as functional units in a large social nervous system: communities link to each other, synchronize over time, form hubs, and change after disruption.

The analogy is deliberately careful. Subreddits are not neurons, and Reddit is not a biological brain. The point is to borrow a useful vocabulary from network science and neuroscience: structure, function, excitation, inhibition, lesions, resilience, and reorganization. That vocabulary makes it easier to ask whether different views of the same social system reveal complementary properties.

The project combines SNAP Reddit hyperlink data, topic categories, LIWC-style linguistic time series, sentiment layers, embedding distances, NetworkX analysis, Plotly visualizations, and a static Next.js interface. The result is both a reproducible analysis pipeline and a visual research prototype.

One part of the work compares structural connectivity with functional connectivity. A subreddit can be directly connected through hyperlinks, but it can also move in parallel with another community over time without a direct link. That gap between wiring and co-activation is where the project becomes interesting.

Another part studies what happens when important hubs are removed. In that setting, moderation events and targeted removals become network lesions: not biological damage, but perturbations that expose how robust or fragile a social network layer is.

The live demo is the best way to read the project. It lets the analysis behave like a map rather than a static report: you can move between structure, sentiment, resilience, and brain-space projections while keeping the central question in view. What does collective online behavior look like when we study it as a connected, adaptive system?