Most people would pay more money to save another person from harm than they would pay to spare themselves, a psychology study suggests.

Short sections written in the first person are interspersed with passages of textual criticism, and there are also summaries of news stories and psychology studies.

Philosophy and psychology study such things.

Personality psychology studies one's distinctive style of cognition, behavior, and affect.

It was first formally noted in various psychology studies in the early 20th century.