Northline Research BlogIndependent research on how brands appear in AI answer engines, including ChatGPT, Perplexity, Gemini, and Google AI Overviews.https://northlineresearch.orgHow answer engines choose citationshttps://northlineresearch.org/blog/citation-selectionhttps://northlineresearch.org/blog/citation-selectionWhat can be observed about source selection in AI answers, and what remains hidden inside unpublished ranking systems.Fri, 18 Sep 2026 00:00:00 GMTmethodscitationsresearch@northlineresearch.org (Northline Research)Measuring brand share of voice in AI answershttps://northlineresearch.org/blog/share-of-voicehttps://northlineresearch.org/blog/share-of-voiceA measurement frame for mention, citation, and recommendation that does not pretend a single prompt is a market.Tue, 04 Aug 2026 00:00:00 GMTmeasurementshare of voiceresearch@northlineresearch.org (Northline Research)Designing a prompt panel for visibility auditshttps://northlineresearch.org/blog/prompt-panel-designhttps://northlineresearch.org/blog/prompt-panel-designHow to build a reusable set of questions that can support an AI visibility study without collapsing into brand theater.Fri, 12 Jun 2026 00:00:00 GMTmethodspromptsresearch@northlineresearch.org (Northline Research)How to read change in Google AI Overviewshttps://northlineresearch.org/blog/ai-overviewshttps://northlineresearch.org/blog/ai-overviewsA cautious guide to observing Google AI Overviews without treating every layout shift as a new ranking system.Thu, 26 Mar 2026 00:00:00 GMTplatformsgoogleresearch@northlineresearch.org (Northline Research)