If you are interested in psychology, explore the field by taking psychology classes in high school and reading all you can about the subject, including biographies of and works by noted psychologists. In addition, make an appointment to talk about the profession with a psychologist who may work at a nearby school, college, hospital, or clinic. Use the Internet to learn more about mental health issues by visiting Web sites, such as that of Mental Health America at https://www.mhanational.org or the American Psychological Association at https://www.apa.org.

If being involved with patient care interests you, gain experience in the health care field by volunteering at a local hospital or clinic. In addition, volunteer opportunities may exist at local nursing homes, where you will also have the chance to work with clients needing some type of assistance. If doing research work sounds appealing to you, consider joining your school's science club, which may offer the opportunity to work on projects, document the process, and work as part of a team.

Psychology is both a science and a profession. As a science, it is a systematic approach to the understanding of people and their behavior; as a profession, it is the application of that understanding to help solve human problems. Psychology is a rapidly growing field, and psychologists work on a great variety of problems.

The field of psychology is so vast that no one person can become an expert in all of its specialties. The psychologist usually concentrates on one specialty. Many specialists use overlapping methodologies, theories, and treatments.

Many psychologists teach some area of basic psychology in colleges and universities. They are also likely to conduct research and supervise graduate student work in an area of special interest.

Clinical psychologists concern themselves with people's mental, emotional, and behavioral disorders. They assess and treat problems ranging from normal psychological crises, such as adolescent rebellion or middle-age loss of self-esteem, to extreme conditions, such as severe depression and schizophrenia.

Some clinical psychologists work almost exclusively with children. They may be staff members at a child guidance clinic or a treatment center for children at a large general hospital. Child psychologists and other clinical psychologists may engage in private practice, seeing clients at offices. Clinical psychologists comprise the largest group of specialists.

Developmental psychologists study how people develop from birth through old age. They describe, measure, and explain age-related changes in behavior, stages of emotional development, universal traits and individual differences, and abnormal changes in development. Many developmental psychologists teach and do research in colleges and universities. Some specialize in programs for children in day care centers, preschools, hospitals, or clinics. Others specialize in programs for the elderly.

Social psychologists study how people interact with one other, and how individuals are affected by their environment. Social psychology has developed from four sources: sociology, cultural anthropology, psychiatry, and psychology. Social psychologists are interested in individual and group behavior. They study the ways groups influence individuals and vice versa. They study different kinds of groups: ethnic, religious, political, educational, family, and many others. The social psychologist has devised ways to research group nature, attitudes, leadership patterns, and structure.

Counseling psychologists work with people who have problems they find difficult to face alone. These clients are not usually mentally or emotionally ill, but they are emotionally upset, anxious, or struggling with some conflict within themselves or their environment. By helping people solve their problems, make decisions, and cope with everyday stresses, the counseling psychologist actually is working in preventive mental health.

School psychologists frequently do diagnosis and remediation. They may engage primarily in preventive and developmental psychology. Many school psychologists are assigned the duty of testing pupils surmised to be exceptional. Other school psychologists work almost entirely with children who have proven to be a problem to themselves or to others and who have been referred for help by teachers or other members of the school system. Many school psychologists are concerned with pupils who reveal various kinds of learning disabilities. School psychologists may also be called upon to work with relationship problems between parents and children.

Industrial-organizational psychologists are concerned with the relation between people and work. They deal with organizational structure, worker productivity, job satisfaction, consumer behavior, personnel training and development, and the interaction between humans and machines. Industrial-organizational psychologists may work with a sales department to help salespeople become more effective. Some study assembly line procedures and suggest changes to reduce monotony and increase worker responsibility. Others plan various kinds of tests to help screen applicants for employment. Industrial-organizational psychologists conduct research to determine qualities that seem to produce the most efficient employees or help management develop programs to identify staff with management potential. They may be asked to investigate and report on certain differences of opinion between a supervisor and one of the workers. Some may design training courses to indoctrinate new employees or counsel older employees on career development or retirement preparation.

Forensic psychologists are psychologists with additional training in legal issues who regularly provide the judicial system with their professional expertise in a variety of matters.

Other industrial psychologists, referred to as engineering psychologists, help engineers and technicians design systems that require workers or consumers and machines to interact. They also develop training aids for those systems.

Consumer psychologists are interested in consumer reactions to products or services. These psychologists may be asked to determine the kinds of products the public will buy. They may study, for instance, whether people prefer big cars or little cars. They might be asked to make decisions about the most appealing ways to present a product through advertising. Many of today's most established advertising, promotion, and packaging practices have been influenced by the opinions and advice of consumer psychologists. Consumer psychologists also try to improve product acceptability and safety in addition to helping the consumer make better decisions.

Psychometrists work with intelligence, personality, and aptitude tests used in clinics, counseling centers, schools, and businesses. They administer tests, score them, and interpret results as related to standard norms. Psychometrists also study methods and techniques used to acquire and evaluate psychological data. They may devise new, more reliable tests. These specialists are usually well trained in mathematics, statistics, and computer programming and technology.

The educational psychologist is concerned primarily with how people teach, learn, and evaluate learning. Many educational psychologists are employed on college or university faculties, and they also conduct research into learning theory. Educational psychologists are also interested in the evaluation of learning.

Experimental psychologists conduct scientific experiments on particular aspects of behavior, either animal or human. Much experimental study is done in learning, in physiological psychology (the relationship of behavior to physiological processes), and in comparative psychology (sometimes called animal psychology). Many experimental psychological studies are carried out with animals, partly because their environments can be carefully controlled.

Many psychologists of all kinds find that writing skills are helpful. They may write up the results of research efforts for a scholarly journal. Psychologists prepare papers for presentation at professional association meetings and sometimes write books or articles. As consultants or industrial psychologists, they may write instruction manuals. Educational psychologists may prepare test manuals.

Some psychologists become administrators who direct college or university psychology departments or personnel services programs in a school system or industry. Some become agency or department directors of research in scientific laboratories. They may be promoted to department head in a state or federal government agency. Chief psychologists in hospitals or psychiatric centers plan psychological treatment programs, direct professional and nonprofessional personnel, and oversee psychological services provided by the institution.