The "trials" you're referring to is probably this study on 1000-word short stories https://www.cambridge.org/core/journals/judgment-and-decision-making/article

The "trials" you're referring to is probably this study on 1000-word short stories https://www.cambridge.org/core/journals/judgment-and-decision-making/article/bot-or-not-can-people-tell-the-difference-between-stories-written-by-a-human-or-by-an-ai-system/45E6DC0BB90AA648654D5AE243F6C667 https://www.cambridge.org/core/journals/judgment-and-decisio...