Illusory Pattern Perception in Large Language Models

After excluding responses with missing dependent variables or outcomes that could not be validly coded, 20,761 valid responses were retained. These include 1,789 valid responses from the baseline experiments, 2,798 from the temperature-manipulation experiments, 14,394 from the role-playing experiments involving eight demographic personas, and 1,780 from the chain-of-thought prompting experiments. By model, the dataset contains 3,584 valid responses from GPT-3.5, 3,578 from GPT-4, 4,800 from GPT-4o, 4,000 from GPT-5, and 4,799 from Doubao.