This is often called psychological hedonism, and if the drive is specified for self-interest: psychological egoism.

However, it is different from other forms of egoism, such as ethical egoism and psychological egoism.

The school has been described by sinologists as an early form of psychological and ethical egoism.

Yangism has been described as a form of psychological and ethical egoism.

Critics identify the fallacy in arguments for psychological egoism, which proposes that all actions conducted by individuals are motivated by their own self-interest.

Reward system, for a proposed anatomic basis of psychological egoism.

Psychological altruism is contrasted with psychological egoism, which refers to the motivation to increase one's own welfare.

In addition, the episode has been analyzed for its themes of physical drives and psychological egoism.

It differs from psychological egoism, which claims that people can only act in their self-interest.

It involves ideas of destiny and free will, as well as of psychological egoism.