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==Methods of human-based computation==
* [[Interactive genetic algorithm]] [Sims 91] 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. In a typical IGA system, a computer program generate an image and presents it to a human user for evaluation/classification.
* [[Wiki]] [Cunningham 95] enables editing the web content by multiple users. Wiki is sometimes interpreted as the backronym for "What I know is", which describes the knowledge contribution, storage and exchange function.
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* [[Human-based genetic algorithm]] [Kosorukoff 98] 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 98] Automated tests to distinguish a human user from a computer program using open problems in AI that have no suitable algorithmic solutions. In some sense, they are also a reverse of IGA: a computer program generates an image and presents it to an agent for evaluation/classification, but uses a reply of the agent to classify it into human or non-human category.
==References==
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