1. Applied Research Subfield
1.1. Forensic Psychologists
1.1.1. They apply psychological principles to legal issues. They conduct research on the interface of law and psychology, help create public policies related to mental health, help law enforcement agencies in criminal investigations, or consult on jury selection and deliberation processes.
1.2. Health Psychologists
1.2.1. They are researchers and practitioners concerned with psychology's contribution to promoting health and preventing disease. They may help individuals lead healthier lives by designing, conducting, and evaluating programs to stop smoking, lose weight, improve sleep, mange pain, etc. Also, they identify conditions and practices associated with health and illness to help create effective intervention.
1.3. Industrial-Organizational (I/O) Psychologists
1.3.1. I/O psychology is the study between people and their working environments. They can help find new ways to increase productivity, improve personal selection, or promote job satisfaction in an organizational setting.
1.4. Neuropsychologists
1.4.1. Neuropsychology is the investigation of the relationship between neurological process and behaviour. As a neuropsychologist you might examine, diagnose, or treat central nervous system disorders such as Alzheimer;s disease or stroke.
1.5. Rehabilitation Psychologists
1.5.1. They are researchers and practitioners that work with people who are in need, that have lost optimal functioning after an accident, illness, or other event.
1.6. School Psychologists
1.6.1. School psychologist involved in the assessment of children in educational setting and intervention for children in educational setting. They treat and diagnose cognitive, social, and emotional problems that may negatively influences children's learning at school.
1.7. Sport Psychologists
1.7.1. Sport psychologist study factors that influence participation in sports and other physical activities. Their professional activities include coach education and athlete preparation, as well as research and teaching.
2. 3 Main Level of Analysis
2.1. Biological Influences
2.1.1. Biological influences is the generic traits that is inherited from their parents that would effect their brain mechanism or hormonal influences and based on the variety of generic traits it will be different for every human on their behaviour and mental process; how they act, sense, adapt and respond to new environment.
2.2. Psychological Influences
2.2.1. Psychological influences human behaviour and mental process by learned fear and other learned expectations, emotional responses.
2.3. Social-cultural Influences
2.3.1. Social-cultural influences individuals based on their background, culture, religion, etc. This influences a person's mental and behaviour based on peer, family and other group expectation.
3. Basic Research Subfield
3.1. Cognitive Psychologists
3.1.1. Cognitive psychology is the study of the thought processes and focus on languages, attention, problem solving, memory, judgement and decision making, etc. A cognitive psychologist can work as a professor, industrial consultant, or human factors specialist in an educational or business setting.
3.2. Developmental Psychologists
3.2.1. Developmental psychology is the process of conducting research on age related behaviour changes. A developmental psychologist has to include all factors like biological, psychological, cognitive and social aspects of development. This field usually specialized in a specific age-group at a time.
3.3. Educational Psychologists
3.3.1. Educational psychology is the study of the psychological processes involved learning. This field focuses on child development as it studies the relationship between learning and physical and social environment.
3.4. Experimental Psychologists
3.4.1. Experimental psychology is the investigation of variety of basic behavioural processes in humans and other animal. The main areas of experimental research include comparative methods of science, motivation, learning, thought, attention, memory, perception, and language.
3.5. Psychometric and Quantitative Psychologists
3.5.1. Psychometric and Quantitative psychology is the study of psychological measurement. it measure knowledge, personality traits, attitudes and abilities. A psychometrician may use new tests for use in clinical and school settings to in business and industry.
3.6. Social Psychologists
3.6.1. Social psychology is the study of how human interacts with others. They study how human beliefs, feelings, and behaviour are affected by others or influenced by others. The topics that they studies are attitudes, aggression, prejudice, interpersonal attraction, group behaviour, and leadership.
4. The Helping Professions
4.1. Clinical Psychologists
4.1.1. Clinical psychologist promote psychological health in individuals, groups, and organizations. They might engage in research, teaching, assessment, and consultation.
4.2. Community Psychologists
4.2.1. Community psychologist focuses on more than just individuals or families, they are more focuses on a bigger scale like a community. They believe that human behaviour is influenced by integration between people and their physical, social, political, and economic environments.
4.3. Counselling Psychologists
4.3.1. Counselling psychologist help people adjust to life transitions or make lifestyle changes. They conduct therapy and provide assessments to individuals and groups.