Unit 1: Introduction [6 Lecture Hours]

Psychology is the scientific study of behavior and mental processes. It examines what people and other organisms do, how they think and feel, why behavior occurs, and how biological, psychological, social, cultural, and developmental factors shape human experience. This unit introduces the basic concepts of psychology, its historical roots, its major goals and perspectives, and the broad scope through which psychological knowledge is studied and applied.

1.1 Introduction to Psychology and Core Concepts

Definition

Psychology is the scientific study of behavior and mental processes.

Psychology studies what people do and what happens inside their minds. It examines actions such as speaking, learning, working, helping, fighting, or avoiding something, as well as internal experiences such as thinking, remembering, feeling, imagining, deciding, and solving problems.

Detailed Explanation

The word psychology comes from the Greek words psyche, historically associated with the soul or mind, and logos, meaning study or discourse. Early thinkers therefore treated psychology mainly as a philosophical study of the mind or soul. Modern psychology developed into a scientific discipline that investigates behavior and mental processes using systematic observation, measurement, experimentation, and other research methods.

The modern definition contains three major ideas:

• Scientific study: psychological conclusions are based on systematic evidence rather than personal opinion, intuition, or superstition.
• Behavior: psychology studies observable actions such as walking, speaking, studying, sleeping, working, cooperating, or reacting to danger.
• Mental processes: psychology also examines internal activities such as perception, attention, memory, thinking, emotion, motivation, imagination, reasoning, and decision-making.

Behavior

Behavior refers to the actions and responses of an organism that can be observed directly or measured indirectly.

Examples include:

• a student answering a question in class,
• a customer choosing one product over another,
• a child crying when separated from a parent,
• an employee arriving late for work,
• a person increasing study time after receiving a low mark.

Behavior does not occur in isolation. It can be affected by previous learning, expectations, emotions, biological conditions, social situations, rewards, punishments, cultural norms, and the person's stage of development.

Mental Processes

Mental processes are internal psychological activities that cannot always be observed directly but can be investigated through behavior, self-report, performance, and physiological measures.

Major mental processes include:

• Perception: interpreting information received through the senses.
• Attention: concentrating mental resources on particular information.
• Memory: encoding, storing, and retrieving information.
• Thinking: mentally processing ideas, information, and relationships.
• Emotion: experiences such as happiness, fear, anger, sadness, or affection.
• Motivation: processes that initiate, direct, and maintain goal-oriented behavior.
• Decision-making: selecting among available alternatives.

Psychology as a Science

Psychology is considered a science because psychologists attempt to study psychological questions through systematic methods. Instead of assuming that a belief is true because it sounds reasonable, researchers collect evidence and examine whether the evidence supports the explanation.

A general scientific approach in psychology follows this pattern:

Question about behavior → proposed explanation → systematic observation or investigation → collection of evidence → analysis → conclusion → further testing

This approach is useful because everyday explanations of behavior can be influenced by personal beliefs, selective memory, stereotypes, and expectations.

Major Characteristics of Psychology

• Scientific: it uses systematic methods to investigate questions.
• Evidence-based: explanations should be supported by observations or data.
• Concerned with behavior and mind: it studies observable actions as well as internal mental activity.
• Concerned with individuals and groups: psychology examines both personal behavior and behavior in social situations.
• Biological and social: it investigates influences ranging from brain processes and genetics to relationships and culture.
• Basic and applied: psychologists develop knowledge and also use that knowledge to address practical problems.

Psychology and Related Disciplines

Psychology connects with many areas of knowledge because behavior has multiple causes.

1.2 Roots and Historical Development of Psychology

Definition

The roots of psychology are the philosophical, biological, and scientific ideas from which modern psychology developed as an independent scientific discipline.

Psychology did not begin as a completely separate subject. Questions about memory, thought, emotion, knowledge, human nature, and the relationship between mind and body were first examined mainly by philosophers. Later, advances in biology and physiology made it possible to investigate some of these questions scientifically.

Detailed Explanation

The history of psychology can be understood as a gradual shift:

Philosophical questions about the mind → scientific study of sensation and physiology → experimental psychology → competing schools of thought → modern multi-perspective psychology

1. Philosophical Roots

Long before psychology became a science, philosophers asked questions that remain psychological questions today:

• How do humans acquire knowledge?
• Are ideas present from birth or learned through experience?
• How are mind and body connected?
• Why do people behave differently?
• What produces emotions, memory, and reasoning?

Ancient Greek Thought

Ancient Greek thinkers made early attempts to explain human thought and behavior through reasoning rather than myth alone.

Plato emphasized reasoning and proposed that some forms of knowledge are not entirely dependent on sensory experience. Aristotle placed greater emphasis on observation and experience and wrote about memory, learning, motivation, perception, and emotion.

These disagreements introduced a question that continued through later psychology: how much of human knowledge and behavior comes from inborn characteristics, and how much develops through experience?

Mind-Body Problem

A major historical question concerned the relationship between the mind and the body.

René Descartes argued for a distinction between mind and physical body while also considering how they might interact. His discussion of reflexive bodily responses contributed to later interest in physiological explanations of behavior.

This historical problem eventually developed into modern scientific questions about relationships among brain activity, cognition, emotion, consciousness, and behavior.

Empiricism

Empiricism is the view that knowledge is substantially acquired through experience and observation.

Thinkers such as John Locke emphasized the importance of experience in forming knowledge. This view influenced later theories of learning because it directed attention toward how environments shape behavior and mental development.

2. Biological and Physiological Roots

During the development of modern science, researchers learned more about the nervous system, sensory organs, reaction time, and brain functioning. These advances made it possible to study processes that had previously been discussed mainly through philosophy.

For example, scientists could investigate:

• how quickly a person responds to a stimulus,
• how sensory information changes with stimulus intensity,
• how damage to different parts of the brain affects behavior,
• how nerve activity contributes to movement and sensation.

This work demonstrated that psychological questions could be examined through measurement and controlled observation.

3. Establishment of Experimental Psychology

A major turning point came in 1879, when Wilhelm Wundt established a laboratory for experimental psychology at the University of Leipzig in Germany. This event is commonly used to mark the formal beginning of psychology as an independent experimental discipline.

Wundt and his colleagues investigated conscious experience through controlled procedures. Their work helped move psychology away from purely philosophical discussion toward laboratory investigation.

Structuralism

Structuralism, strongly associated with Edward B. Titchener, attempted to analyze conscious experience into basic components such as sensations, images, and feelings.

Structuralists often relied on introspection, in which trained participants reported details of their conscious experiences under controlled conditions.

The approach contributed to early experimental psychology but faced a serious difficulty: reports about private conscious experiences could vary among observers and were difficult to verify objectively.

Functionalism

Functionalism focused on what mental processes and behavior do rather than trying only to identify the elements of consciousness.

William James was a major figure associated with this approach. Functionalists were interested in how thinking, learning, emotion, and behavior help individuals adapt to their environment.

The approach was influenced partly by evolutionary thinking, especially the idea that useful characteristics may contribute to adaptation and survival.

4. Psychodynamic Development

Sigmund Freud developed psychoanalytic ideas that emphasized unconscious processes, internal conflicts, early childhood experiences, and psychological motives.

This approach challenged the assumption that people always understand the causes of their own behavior. Freud proposed that important psychological influences may operate outside conscious awareness.

Later theorists revised many of Freud's ideas, producing broader psychodynamic approaches.

5. Rise of Behaviorism

Behaviorism developed partly as a reaction against approaches that depended heavily on introspection and unobservable mental processes.

John B. Watson argued that psychology should focus on objectively observable behavior. Later, B. F. Skinner extensively studied how consequences such as reinforcement and punishment influence behavior.

Behaviorism helped establish controlled experimentation and learning as major areas of psychological research.

6. Cognitive Development

Behaviorism explained many forms of learning effectively, but psychologists increasingly recognized that human behavior could not be fully understood without examining internal processes such as memory, language, reasoning, attention, and problem-solving.

The resulting cognitive approach treated the mind as a legitimate subject of scientific study, provided mental processes were investigated through systematic and measurable methods.

Modern cognitive psychology now studies processes such as perception, attention, memory, language, judgment, problem-solving, and decision-making.

7. Modern Psychology

Modern psychology does not depend on one single school of thought. Psychologists frequently draw from several perspectives depending on the question being investigated.

A behavior such as aggression, for example, may involve:

• learned responses from the environment,
• interpretations and beliefs,
• brain and hormonal processes,
• developmental experiences,
• social pressure,
• cultural norms,
• and processes connected with adaptation.

The historical development of psychology therefore moved from competing single explanations toward a discipline in which multiple levels of explanation can be combined.

1.3 Goals of Psychology

Definition

The goals of psychology are to describe, explain, predict, and change or influence behavior and mental processes through psychological knowledge.

Psychologists do more than observe what people do. They try to identify what is happening, understand why it happens, determine when it is likely to happen again, and use reliable knowledge to improve or modify outcomes where appropriate.

Detailed Explanation

The four goals are connected. Psychologists generally need an accurate description before they can explain a behavior. A useful explanation can support prediction, and reliable prediction provides a basis for interventions designed to change behavior or improve psychological outcomes.

The sequence can be represented as:

Describe → Explain → Predict → Change or Influence

1. Describe

Description means observing, identifying, measuring, and recording behavior or mental processes as accurately as possible.

The central question is:

What is happening?

Before explaining a behavior, psychologists need to know its characteristics. They may examine its frequency, intensity, duration, pattern, and the circumstances in which it occurs.

For example, suppose university students report difficulty concentrating during lectures. A descriptive investigation might examine:

• how many students experience the problem,
• when concentration decreases,
• how long attention is maintained,
• whether the pattern differs across teaching environments,
• and what other conditions occur alongside the difficulty.

Description provides a factual picture but does not by itself identify the cause.

2. Explain

Explanation means identifying factors or mechanisms that account for why a behavior or mental process occurs.

The central question is:

Why does it happen?

Psychologists develop and test explanations about relationships among variables. A good psychological explanation must go beyond describing two events that occur together and examine whether the proposed mechanism is supported by evidence.

Continuing the concentration example, possible explanations might involve:

• insufficient sleep,
• high cognitive load,
• lack of interest,
• stress,
• environmental distraction,
• or learned study habits.

Research is then needed to determine which explanation, or combination of explanations, is supported.

3. Predict

Prediction means using established patterns and relationships to estimate when a behavior or mental process is likely to occur.

The central question is:

When or under what conditions is it likely to happen?

Prediction does not require perfect certainty. Human behavior is influenced by many variables, so psychological predictions are often probabilistic.

For example, if evidence consistently shows that severe sleep restriction is associated with poorer attention, psychologists may predict that students who experience substantial sleep loss are more likely to show concentration difficulties than well-rested students under comparable conditions.

4. Change or Influence

Change or influence means applying psychological knowledge to modify behavior, improve functioning, reduce harmful outcomes, or create conditions that support desirable outcomes.

The central question is:

How can the outcome be changed?

Depending on the context, psychologists may design interventions involving learning methods, environmental changes, counseling, organizational practices, communication, behavioral techniques, or other evidence-based approaches.

In the concentration example, possible interventions could include improving sleep routines, reducing environmental distraction, modifying study schedules, changing instructional methods, or teaching attention-management strategies.

Relationship Among the Four Goals

Consider a workplace where employee absenteeism has increased.

1.4 Major Perspectives in Psychology

Definition

A psychological perspective is an organized way of explaining behavior and mental processes by emphasizing particular causes, mechanisms, or levels of analysis.

The same behavior can be viewed from different angles. One psychologist may examine learned habits, another may study thoughts and beliefs, another may examine brain activity, while another may focus on culture or early experience. Each perspective highlights a different part of the explanation.

Detailed Explanation

Human behavior is complex. A single perspective rarely explains every part of a psychological phenomenon. Modern psychology therefore uses several major perspectives, each asking a different type of question.

The perspectives covered in this unit are:

• Behavioral perspective
• Cognitive perspective
• Biological perspective
• Evolutionary perspective
• Developmental perspective
• Psychodynamic perspective
• Social and cultural perspective

1. Behavioral Perspective

The behavioral perspective explains behavior mainly in terms of learning and environmental influences.

Its central question is:

How has the behavior been learned and maintained?

Behavioral psychologists focus strongly on relationships among stimuli, responses, consequences, and previous learning experiences.

Two major forms of learning associated with this perspective are:

• Classical conditioning: learning through associations between stimuli.
• Operant conditioning: learning in which behavior is influenced by its consequences, including reinforcement and punishment.

Reinforcement increases the likelihood that a behavior will occur again, while punishment is intended to reduce the likelihood of a behavior.

For example, a student who receives praise every time an assignment is submitted early may become more likely to submit future assignments early. The behavioral perspective examines the relationship between the consequence and the repeated behavior.

Major figures historically associated with behavioral approaches include John B. Watson and B. F. Skinner.

2. Cognitive Perspective

The cognitive perspective focuses on mental processes involved in acquiring, processing, storing, interpreting, and using information.

Its central question is:

How do thoughts and information-processing processes influence behavior?

Cognitive psychologists study areas such as:

• perception,
• attention,
• memory,
• language,
• reasoning,
• problem-solving,
• judgment,
• decision-making.

Two people may experience the same event but react differently because they interpret it differently.

For example, two students are asked to give a presentation. One thinks, “This is a chance to explain what I know,” while another thinks, “Everyone will notice every mistake.” The external situation is similar, but their interpretations may produce different emotional and behavioral responses.

Behavioral and Cognitive Perspectives Compared

3. Biological Perspective

The biological perspective explains behavior and mental processes by examining physical processes in the body, especially the brain and nervous system.

Its central question is:

What biological processes contribute to this behavior or mental experience?

This perspective examines influences such as:

• brain structures and their functions,
• neurons and communication in the nervous system,
• neurotransmitters, which are chemical messengers involved in communication between nerve cells,
• hormones produced by the endocrine system,
• genetic influences,
• sleep, nutrition, injury, and other physiological conditions.

For example, memory difficulties may be investigated by examining brain structures involved in memory formation, neurological damage, sleep quality, medication effects, or other biological factors.

The biological perspective does not necessarily claim that behavior has only biological causes. Rather, it identifies biological processes that interact with psychological and environmental influences.

4. Evolutionary Perspective

The evolutionary perspective examines psychological characteristics and behavioral tendencies in relation to adaptation, survival, reproduction, and natural selection.

Its central question is:

How might a psychological tendency have been related to adaptive problems faced across human evolutionary history?

The perspective is influenced by the principles of evolution associated with Charles Darwin.

Natural selection is the process through which heritable characteristics that improve reproductive success in a particular environment can become more common across generations.

Evolutionary psychologists investigate possible adaptive functions of tendencies related to areas such as:

• fear and threat detection,
• mate selection,
• parental behavior,
• cooperation,
• competition,
• social relationships.

For example, rapid attention to a possible threat can be examined as a mechanism that may have increased the chance of avoiding danger. Modern evolutionary explanations must still be evaluated using scientific evidence rather than assuming that every behavior is adaptive.

5. Developmental Perspective

The developmental perspective examines changes and continuities in behavior and mental processes across the lifespan.

Its central question is:

How and why do people change or remain stable as they grow?

Development includes several interconnected areas:

• Physical development: changes in the body, brain, sensory abilities, and motor functioning.
• Cognitive development: changes in thinking, reasoning, memory, language, and problem-solving.
• Emotional development: changes in emotional experience, regulation, and understanding.
• Social development: changes in relationships, identity, social behavior, and interaction with others.

The developmental perspective studies the entire lifespan rather than focusing only on childhood.

A developmental psychologist might investigate how memory changes with age, how children develop language, how adolescents form identity, or how social relationships change in later adulthood.

6. Psychodynamic Perspective

The psychodynamic perspective emphasizes unconscious psychological processes, internal conflicts, motives, and the influence of early experiences on later behavior.

Its central question is:

What hidden motives, conflicts, or earlier experiences may be influencing present behavior?

The perspective developed from the work of Sigmund Freud. Freud proposed that conscious awareness represents only part of mental life and that important psychological processes may operate outside awareness.

In a broad psychodynamic explanation, behavior may reflect interactions among:

• conscious wishes,
• unconscious motives,
• internal psychological conflicts,
• early relationships and experiences,
• ways of managing anxiety or unacceptable impulses.

Later psychodynamic theorists modified many of Freud's original ideas, but continued to emphasize processes outside immediate conscious awareness and the influence of earlier interpersonal experiences.

Psychodynamic and Biological Perspectives Compared

7. Social and Cultural Perspective

The social and cultural perspective examines how behavior and mental processes are influenced by other people, groups, social situations, cultural values, social norms, and cultural practices.

Its central question is:

How do the social environment and culture shape what people think, feel, and do?

Social Influences

People often behave differently when they are alone than when they are with others. Social psychology investigates influences such as:

• group pressure,
• social roles,
• leadership,
• conformity,
• obedience,
• attraction,
• prejudice,
• cooperation,
• competition.

For example, a person may publicly agree with a group despite privately holding a different opinion. A social explanation examines how group expectations, fear of rejection, social identity, or authority influence the response.

Cultural Influences

Culture refers to shared patterns of knowledge, beliefs, values, practices, norms, symbols, and ways of living transmitted within a social group.

Culture can influence:

• how emotion is expressed,
• how people define success,
• family relationships,
• communication styles,
• ideas about independence and responsibility,
• attitudes toward authority,
• social expectations and acceptable behavior.

A behavior that is encouraged in one cultural setting may be discouraged or interpreted differently in another. Psychologists therefore need to consider cultural context before assuming that findings from one population apply equally to all populations.

Comparison of Major Perspectives

Why Multiple Perspectives Are Used

Complex behavior usually results from interacting influences. Consider stress:

Demanding situation → person's interpretation → physiological response → learned coping habits → previous developmental experiences → social support and cultural expectations → resulting behavior

A broader explanation may therefore combine evidence from several perspectives. This is one reason modern psychology is often described as a discipline with multiple levels of analysis.

1.5 Scope of Psychology

Definition

The scope of psychology refers to the wide range of behaviors, mental processes, populations, settings, and practical problems studied through psychological knowledge.

Psychology reaches from activity inside the brain to individual thoughts and emotions, relationships between people, behavior inside organizations, and patterns influenced by society and culture. It also applies psychological knowledge in areas such as education, health, counseling, workplaces, sports, law, and consumer behavior.

Detailed Explanation

The scope of psychology is broad because human behavior can be investigated at several connected levels.

Biological processes → individual mental processes → interpersonal relationships → groups and organizations → society and culture

Changes at one level can influence the others. For example, chronic workplace stress may involve physiological arousal, personal interpretations, relationships with supervisors, organizational policies, and broader cultural expectations about work.

1. Individual Level

At the individual level, psychologists examine psychological processes occurring within a person.

Major areas include:

• sensation and perception,
• attention,
• learning,
• memory,
• thinking and reasoning,
• intelligence,
• emotion,
• motivation,
• personality,
• decision-making,
• psychological adjustment.

Psychologists may ask why people remember some information better than other information, how motivation affects performance, or why individuals differ in personality and behavior.

2. Biological and Physiological Level

Psychology also investigates relationships between bodily processes and psychological functioning.

This includes study of:

• brain structures and activity,
• the nervous system,
• hormonal processes,
• genetic influences,
• sleep and biological rhythms,
• physiological responses to stress and emotion.

This level connects psychology closely with neuroscience, biology, and medicine.

3. Development Across the Lifespan

Psychologists investigate change from infancy through childhood, adolescence, adulthood, and later life.

Research may examine:

• language development,
• emotional regulation,
• cognitive growth,
• identity formation,
• social relationships,
• aging and memory.

The scope therefore includes both change and stability across different stages of life.

4. Interpersonal and Social Level

At the interpersonal level, psychology examines how people influence one another.

Topics include:

• communication,
• attraction and relationships,
• helping behavior,
• aggression,
• attitudes,
• persuasion,
• conformity,
• group influence.

For example, researchers may investigate why individuals conform to group opinions or how communication style affects cooperation.

5. Group and Organizational Level

Psychology is widely used to study behavior in organizations and workplaces.

Relevant areas include:

• employee motivation,
• leadership,
• job satisfaction,
• team behavior,
• workplace communication,
• recruitment and selection,
• training,
• performance assessment,
• organizational culture.

Psychological knowledge can help organizations understand how work conditions affect employee behavior and how people interact in teams and leadership structures.

6. Social and Cultural Level

Psychologists also study how larger social and cultural environments shape psychological functioning.

Questions may involve:

• social norms,
• cultural values,
• social identity,
• stereotypes and prejudice,
• community behavior,
• cultural differences in emotion and communication.

This level helps prevent psychological theories from treating the behavior of one social or cultural group as universal without evidence.

Basic and Applied Psychology

The scope of psychology can also be understood through the distinction between basic psychology and applied psychology.

Basic psychology develops knowledge about psychological processes. Applied psychology uses psychological knowledge to address practical problems in real settings.

Major Fields Within the Scope of Psychology

Experimental Psychology

Experimental psychology investigates psychological processes through controlled research methods. Topics may include perception, learning, attention, memory, and decision-making.

Cognitive Psychology

Cognitive psychology studies internal mental processes such as attention, perception, memory, language, reasoning, problem-solving, and judgment.

Developmental Psychology

Developmental psychology investigates physical, cognitive, emotional, and social development across the lifespan.

Social Psychology

Social psychology studies how people's thoughts, emotions, and behaviors are influenced by the actual, imagined, or implied presence of other people and by social situations.

Personality Psychology

Personality psychology investigates relatively consistent patterns of thinking, feeling, and behaving, as well as individual differences among people.

Biological Psychology

Biological psychology examines relationships among the brain, nervous system, biological processes, behavior, and mental functioning.

Clinical Psychology

Clinical psychology applies psychological knowledge to the assessment and treatment of psychological difficulties and problems in functioning.

Counseling Psychology

Counseling psychology focuses on helping people manage personal, social, educational, career-related, and emotional difficulties and improve psychological functioning.

Educational Psychology

Educational psychology applies knowledge about learning, motivation, development, cognition, and assessment to educational settings.

It may investigate:

• how students learn,
• how motivation affects achievement,
• how teaching methods influence understanding,
• how learner differences affect performance.

Industrial and Organizational Psychology

Industrial and Organizational Psychology applies psychological principles to workplaces and organizations.

Its concerns include:

• employee selection,
• training,
• motivation,
• job satisfaction,
• leadership,
• teamwork,
• organizational behavior,
• work performance.

Health Psychology

Health psychology studies how psychological, behavioral, and social factors influence health and illness.

Examples include stress management, health habits, treatment adherence, coping with illness, and behavior related to physical health.

Sports Psychology

Sports psychology applies psychological principles to athletic performance and participation.

It examines areas such as motivation, concentration, confidence, performance pressure, teamwork, and psychological preparation.

Forensic Psychology

Forensic psychology applies psychological knowledge in legal and criminal justice contexts.

Its work can involve psychological assessment, understanding behavior relevant to legal proceedings, and research related to law and human behavior.

Consumer Psychology

Consumer psychology studies how psychological processes influence purchasing, product evaluation, advertising responses, brand perception, and consumer decision-making.

For example, psychologists may study how attention, emotion, social influence, memory, and framing affect purchasing decisions.

Environmental Psychology

Environmental psychology studies relationships between people and physical environments.

It may investigate responses to noise, crowding, architecture, natural environments, environmental stress, or behavior related to conservation.

Psychology in Everyday Life

The scope of psychology extends beyond professional practice because psychological processes are involved in ordinary activities.

Connection Across Levels

One of the most useful features of psychology is that it can connect explanations across levels.

Consider poor workplace performance:

Sleep loss or health condition → reduced attention → negative expectations → lower motivation → strained team interaction → poor performance

The sequence shows why a purely individual explanation may be incomplete. Biological condition, cognition, motivation, interpersonal relationships, and organizational environment can interact.

Whole Chapter Summary

Introduction to Psychology

Psychology is the scientific study of behavior and mental processes. It investigates observable actions together with internal processes such as perception, memory, thinking, emotion, motivation, and decision-making through systematic evidence.

Roots of Psychology

Psychology developed from philosophical questions about the mind, knowledge, and behavior, together with scientific advances in biology and physiology. The establishment of Wilhelm Wundt's experimental laboratory in Leipzig in 1879 represented a major step toward psychology becoming an independent scientific discipline.

Goals of Psychology

The four goals are describe, explain, predict, and change or influence. Psychologists first identify what is happening, investigate why it happens, estimate the conditions under which it is likely to occur, and apply reliable knowledge to influence outcomes where appropriate.

Behavioral Perspective

The behavioral perspective explains behavior through learning and environmental influences. Conditioning, reinforcement, punishment, and relationships between stimuli and responses are central concepts.

Cognitive Perspective

The cognitive perspective studies how people perceive, remember, interpret, think about, and use information. Behavior is influenced not only by events themselves but also by how those events are mentally processed.

Biological Perspective

The biological perspective examines how the brain, nervous system, genes, hormones, neurotransmitters, and other physiological processes contribute to behavior and mental activity.

Evolutionary Perspective

The evolutionary perspective examines psychological tendencies in relation to adaptation, natural selection, survival, reproduction, and recurring problems faced during human evolutionary history.

Developmental Perspective

The developmental perspective studies change and continuity in physical, cognitive, emotional, and social functioning across the entire lifespan.

Psychodynamic Perspective

The psychodynamic perspective emphasizes unconscious processes, psychological conflicts, motives, and the continuing influence of earlier experiences on present behavior.

Social and Cultural Perspective

The social and cultural perspective examines how other people, groups, social roles, norms, values, and cultural contexts influence thought, emotion, and behavior.

Scope of Psychology

Psychology covers biological processes, individual mental functioning, lifespan development, interpersonal relationships, organizations, society, and culture. Its knowledge is developed through basic research and applied in areas such as education, counseling, health, business, workplaces, sports, law, and consumer behavior.

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