* [[Interactive genetic algorithm]] [Sims 199191] enables the user to create an abstract drawing only be selecting his/her favorite images displayed on the computer screen, so human performs fitness computation. [Unemi 1998] Simulated breeding style introduces no explicit fitness, just selection, which is easier for human
* [[Human-based genetic algorithm]] [Kosorukoff 199898] uses human selection in the same way as IGA, but also enables users to take part in the innovation performing intelligent mutation and crossover, thus all operators of a typical GA are now outsourced to humans (hence the name '''human-based''')
* [[Captcha]] (reverse Turing test) [Lillibridge 199898] Automated tests to distinguish a human user from a computer program using open problems in AI that have no suitable algorithmic solutions
