Are Your Survey Open-Ends Written by AI? The 2026 Data-Quality Crisis
A third of online research participants now use LLMs to answer open-ended questions, and an autonomous AI agent passed 99.8% of standard attention checks in a 2025 PNAS study. Here is what the evidence actually shows, why detection is losing, and what still works.
Koji Team · August 7, 2026 · 13 min read