From 1976 to 1979, the group lived in campgrounds, usually in the Rocky Mountains or Texas. Applewhite and Nettles began to place greater demands on their followers' heretofore loosely structured lives, which improved membership retention. They typically communicated with their disciples in writing or through assistants. Increasingly, they emphasized that they were the only source of truth—the idea that members could receive individual revelations was rejected in an attempt to prevent schisms. Applewhite also sought to prevent close friendships among his followers, fearing that this could lead to insubordination. He and Nettles insisted that their followers practice what they referred to as "flexibility" - strict obedience to their often shifting requests. The two leaders limited the group's contacts with those outside the movement, even some who may have been interested in joining, ostensibly to prevent infiltration from hostile parties. In practice, this made their followers completely dependent upon them. Applewhite instructed his disciples to be like children or pets in their submission—their sole responsibility was to obey their leaders. Members were encouraged to constantly seek Applewhite's advice and often ask themselves what their leaders would do when making a decision. To his followers, he did not seem dictatorial: many of them found him laid back and fatherly. In his 2000 study of the group, Winston Davis states that Applewhite mastered the "fine art of religious entertainment", noting that many of his disciples seemed to enjoy their service. Applewhite organized seemingly arbitrary rituals that were intended to instill a sense of discipline in his followers; he referred to these tasks as "games". He also watched science fiction television programs with the rest of the group. Rather than issue direct commands, he attempted to express his preferences and nominally offer his disciples a choice. He emphasized that students were free to disobey if they chose, in what Lalich dubs the "illusion of choice".