Contact Experiment

Contact Experiment is a term used to describe the process in which a human has contact with any Adam oriented being. This process is what causes the subject's soul to be drawn into the Evangelions. Known subjects are Yui Ikari with Evangelion Unit-01 and Kyoko Zeppelin Soryu with Evangelion Unit-02. There was also a Contact Experiment between a human and Adam that initiated Second Impact, though it is never stated who it was with.