Psychological Experiments Online Psychological Experiments Online is a multimedia online resource that synthesizes the most important psychological experiments of the 20th and 21st centuries, fostering deeper levels of understanding for students and scholars alike. The collection pairs 65 hours of audio and video recordings of the original experiments (when existent) with 45,000 pages of primary-source documents. It’s packed with exclusive and hard-to-find materials including notes from experiment participants, journal articles, books, field notes, letters penned by the lead psychologist, videos of modern-day replications, and modifications to the original experiments.