Final answer:
The foot-in-the-door technique is the method of persuasion where agreeing to small requests increases the likelihood of agreeing to larger ones, which is the technique used by Jim Jones with the People's Temple members.
Step-by-step explanation:
The type of gradual persuasion described is known as the foot-in-the-door technique.
The foot-in-the-door technique is a method of persuasion whereby a person is encouraged to agree to a small request, and once they comply, they are more likely to agree to a larger one later on. This was demonstrated by Freedman and Fraser in 1966, showing that once individuals agreed to a smaller favor, such as posting a small sign in their yard, they were more likely to consent to a larger request, such as a large yard sign.
This persuasive technique relies on the principle of consistency, as our past behaviors often guide our future actions, and we have an innate desire to act in a manner that is consistent with past commitments. In Jim Jones' case, he progressively increased his demands on the People's Temple members, starting with minor commitments and leading up to more significant and personal sacrifices.