Final answer:
Cultural anthropologists Beth Conklin and Aparecida Vilaça conducted field research to study the Wari's cannibalism, using methods such as participant observation and interviews. They discovered that the Wari' practiced different types of cannibalism and studied the beliefs and practices associated with each type.
Step-by-step explanation:
Research methods used to understand the Wari's cannibalism were conducted by cultural anthropologists Beth Conklin and Aparecida Vilaça. They conducted field research among the Wari' of western Amazonia in Brazil. Through participant observation and interviews with community members, they gained insights into the different types of cannibalism practiced by the Wari', such as endocannibalism and exocannibalism. They also studied the beliefs, practices, and symbolism associated with each form of cannibalism. Their research provides valuable insights into the cultural significance of cannibalism among the Wari'.