Psychology is a large subject. Different specialists use it in different settings. A field is an area of study. A job is a role someone does. The two can overlap in several ways.

Field	Main question or task	Example setting
Clinical and counseling	Understanding psychological difficulties and helping people improve their lives.	Hospitals, community services, private practice.
Industrial and organizational, or I-O	Improving work, training, staff selection, performance, and satisfaction.	Businesses and other workplaces.
Health	Understanding links among behavior, psychological factors, and health.	Health services, universities.
School	Supporting students, teachers, and families with learning and school difficulties.	Schools and school services.
Forensic	Applying psychology to legal questions, such as eyewitness memory.	Courts and justice services.
Criminal	Studying thoughts, motives, and behavior related to crime.	Research and justice settings.
Environmental	Studying how people and physical surroundings affect each other.	Workplace design and research.
Sports	Helping people understand performance, motivation, and pressure in sport.	Teams, schools, training centers.
Developmental	Studying changes across life and evaluating support programs.	Research, schools, community agencies.
Social and cross-cultural	Studying social influence and similarities and differences across cultures.	Research, organizations, marketing.
Biological and cognitive	Studying body processes or mental processes.	Universities, labs, human-computer interaction research.

Workplace psychologists may help design safer equipment or fairer staff selection. A forensic psychologist may study whether a witness's memory is reliable. Criminal and forensic psychology are related, but forensic work covers wider legal questions.

These are examples of work, not promises about qualifications or job entry. One professional may combine research, teaching, and practical work.