Research summaries on AI citation behaviour, content evidence, and what the published studies show — labelled by source and confidence tier.
A close reading of Aggarwal et al. (2024) — the only peer-reviewed study in our tool set. What they measured, how they measured it, and what the +31% figure actually means for content you're writing today.
Zhang et al. 2026 analysed 21,143 citations across ChatGPT, Google AI Overviews, and Perplexity. Here's what they found about the structural properties of high-influence pages — and what the preprint status means for how you should use it.
Traditional SEO optimised for keyword density. AI citation optimisation requires something fundamentally different — evidence density. Here's why the two diverge, and what the research says about the signals that actually matter to AI systems.
The Evidence Density Score is the highest-confidence starting point. Peer-reviewed source. No signup.