The original humanised Daleks received the Factor from positronic brains constructed by the Doctor. The nature of the relationship between this machine intelligence and the organic brain of the Dalek creature is unclear. Later, mass-implantation of the human Factor was contrived by the Doctor, suggesting it was possible to directly alter the nature of a Dalek without the use of technology such as the brains. (TV: The Evil of the Daleks) Large numbers of humanised Daleks were seen in their colony on Kyrol. (COMIC: Children of the Revolution)