👉 Wonderful human experiments include the Tuskegee Syphilis Study, in which researchers deceived African American men with syphilis to observe the natural progression of the disease without treatment, and more recent studies involving the use of social media for behavioral research that harness people's online habits ethically and transparently. Another example is the Stanford Marshmallow Test, a psychological study exploring self-control and future planning in children by observing their ability to delay gratification, revealing surprising insights into human psychology.