The Lab
UX, AI & Product
Hands-on experiments and analysis around digital platforms.
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German Health-Insurance Websites: What to Review First
56,198 pages from 84 German statutory health-insurance sites, AI-assisted and triaged. Which review patterns recur and how teams turn them into a work order.
Read articleContent Testing: Test Clarity, Measure Impact
A lean content-testing process for clearer interfaces, supportable conversion hypotheses and more reliable AI conversations.
Read articleAleph Alpha's Kolibri-1 Tested: AI “Made in Germany”?
Aleph Alpha's Kolibri-1 tested: in a rewrite it dropped a selling point, and in a jailbreak test 12 of 20 answers held explosives instructions.
Read articleContent Governance for AI Search in Regulated Industries
Why regulated industries do not need another GEO tool, but an operating system for supportable claims, AI visibility, conversion and compliance.
Read articleInterpretation Stability in AI Answers
A testable framework for claim fidelity: measure whether conditions, evidence levels and validity survive AI summarization and rephrasing.
Read articleWeekly AI Briefing Agent: What My Filter Really Needs
A working AI news filter, its prompt failures and three rules for relevance, sources and real tests instead of daily FOMO.
Read articleGemini Live in the Browser: A Voice AI Prototype
A browser demo with native audio and function calling. What it shows—and what remains unresolved for costs, privacy and real-world use.
Read articleSchema, llms.txt and Structured Outputs Explained
Schema.org helps search engines, llms.txt can guide agents and Structured Outputs enforce a format. Four layers that are often confused.
Read articleWhy Google Clicks Are Disappearing: AI Overviews and CTR
Pew, Ahrefs, and academic research measure fewer clicks when AI Overviews appear. What the figures actually show and which SEO metrics matter now.
Read articleHanzi Movie Method: How It Works (+ Free Script App)
Actor, Set, Room, Props, Script: how the Hanzi Movie Method turns Chinese characters into movie scenes. A free browser app writes the scripts — no sign-up.
Read articleGEO: What AI Overviews Really Change About SEO
GEO remains SEO, but adds a measurement layer: whether content is found, cited and represented accurately in AI Overviews and ChatGPT.
Read articleHumanizer (German): A Claude Skill for More Human AI Text
Humanizer (German) for Claude Code and Codex: edit 72 German AI-writing patterns without Python. Open source under MIT and CC BY-SA.
Read articleVerbalized Sampling: More Varied AI Responses
A prompt for more varied responses, with rough model probabilities, a cost trade-off, and a clear selection rule.
Read articleBad UX Endangers IT Security and Inclusion
A documented CAPTCHA case shows why abuse prevention, server-side validation and accessibility must be tested together.
Read articleAI Personas as Hypotheses: Making Contradictions Visible
How synthetic personas can produce usage hypotheses and test questions without replacing interviews, behavioral data, or real users.
Read articleDark Patterns in UX Design at Banks
An anonymized banking case shows how a reward, unclear purposes, and repeated prompts can distort consent.
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