Naivety theory originated in the field of psychology and was first put forward by American psychologist Fritz Heider. Naive theory refers to a simplified theory based on common sense and experience formed in people's daily cognitive process, which is used to explain and predict the causes, relationships and results of events and phenomena in the world.

At present, the naive theory is mainly used in the following fields:

Social psychology: applying naive theory to study people's cognition of social behavior and social relations. For example, study people's interpretation and evaluation of other people's behavior, as well as people's understanding of other people's personality and intentions.

Cognitive psychology: Naive theory is used to study people's general cognitive patterns and reasoning methods about things. For example, how people conduct causal reasoning, attribution theory and information processing.

Educational psychology: naive theory is widely used in the field of education. Researchers use naive theory to explore students' previous knowledge, common sense and ideas and bring them into classroom teaching to help students better understand new concepts and new knowledge.

Communication and communication: Naive theory has application in studying people's understanding and interpretation of information. For example, study how people interpret and evaluate news reports and advertisements according to their own naive theories.

Organizational behavior: Naive theory has a guiding role in studying interpersonal relationship, leadership style and organizational culture in organizations. By understanding people's naive theories about events and situations in organizations, teams and organizations can be better managed.