CBSE Class 11 Psychology

Chapters: 8

1. Understanding Psychology

Nature of psychology · Growth and branches of psychology

Nature of Psychology: The Science of Mind and Behaviour – Psychology is the science that studies mental processes (like thinking and remembering), experiences (our private feelings) and behaviour (what we do). Mental processes cannot be seen, so psychologists infer them from behaviour. Behaviour can be overt (seen from outside) or covert (hidden inside, like a racing heart). Psychology is a discipline with its own methods and theories. It is a natural science because it uses experiments and studies the brain and body, and a social science because it studies people in families, groups and culture. Mind and brain are linked but not the same. Many popular beliefs about psychology, like "psychologists read minds", are not true.
Growth and Branches of Psychology: From One Lab to Many Fields – Modern psychology began in 1879 when Wilhelm Wundt set up the first psychology lab in Leipzig, Germany (structuralism, using introspection). William James asked what the mind does (functionalism). Freud stressed unconscious wishes (psychoanalysis), Gestalt psychologists said we see wholes, and Watson said study only visible behaviour (behaviourism). Later came humanistic (Rogers, Maslow), cognitive and constructivist (Piaget, Vygotsky) views. In India, ideas about the mind are ancient; modern psychology began at Calcutta University in 1915 and later focused on Indian problems and indigenous ideas. Psychology now has many branches (cognitive, biological, developmental, social, clinical, health, educational, organisational, environmental, sports and more) and links with philosophy, medicine, economics, sociology, computer science, law and media. It also helps us in daily life.

2. Methods of Enquiry in Psychology

Goals and steps of research · Methods of psychology · Analysis, limits and ethics

Goals and Steps of Research in Psychology – Psychological research has four goals: description (what happens), prediction (what will happen), explanation (why it happens) and application (using findings to solve problems and improve life). Scientific research follows four steps: conceptualising a problem (topic and a testable hypothesis), collecting data (participants, method, tools, procedure), drawing conclusions (statistics) and revising conclusions (fitting results into theory). A variable is anything that can change; the independent variable is changed by the researcher and the dependent variable is measured. Besides the scientific (quantitative) paradigm, there is an interpretive (qualitative) paradigm that seeks meanings in people's own words. Psychological data may be demographic, physical, physiological or psychological, and are never fully free of their context.
Methods of Psychology: Observation, Experiment, Correlation, Survey, Tests and Case Study – Psychologists use six main methods. Observation means watching and recording behaviour carefully, in natural or controlled settings, as a participant or non-participant. An experiment changes one variable (IV) for an experimental group but not a control group, keeps extraneous variables constant and measures the effect (DV); only experiments show cause and effect. Correlational research measures two variables and finds how strongly they move together (r from −1 to +1: positive, negative or zero), but it cannot prove cause. A survey asks many people through interviews or questionnaires. Psychological tests are standardised tools that must be reliable, valid and have norms. A case study is an in-depth study of one person or group using many sources.
Analysis of Data, Limitations and Ethics in Psychological Research – Psychological data are analysed in two ways. Quantitative analysis uses numbers and statistics (like the mean) to find patterns. Qualitative analysis uses words, images and stories and sorts them into themes to find meanings. The two are often combined. Psychological enquiry has limits: its scales have no true zero point, its tools are relative to the culture in which they were made, and qualitative data can be interpreted subjectively. Research must be ethical: participation must be voluntary, participants must give informed consent, they should be debriefed after the study, the results should be shared with them, and their data must be kept confidential.

3. Human Development

Meaning and influences · Stages of development

Human Development: Meaning, Life-Span View and Influences – Development is the pattern of change that begins at conception and continues through the whole life. It includes growth (increase in size), maturation (changes that unfold on a biological timetable) and learning from experience. The life-span view says development is lifelong, multidimensional, multidirectional, plastic, shaped by history, studied by many disciplines and contextual. It involves biological, cognitive and socio-emotional processes that affect each other. Development results from heredity (genotype) and environment working together to produce what we see (phenotype). Contexts matter: Bronfenbrenner described nested systems (micro, meso, exo, macro and chrono), and Durganand Sinha described the Indian child's ecology as inner and outer layers that change over time.
Stages of Human Development: From Before Birth to Old Age – The prenatal stage runs from conception to birth in three periods: germinal (first two weeks), embryonic (2–8 weeks) and fetal (9 weeks to birth); harmful agents called teratogens (alcohol, smoking, drugs, infections like rubella) and the mother's nutrition and stress affect the baby. Infancy (0–2 years) begins with reflexes, then motor milestones, attachment and object permanence (Piaget's sensorimotor stage). In early childhood (2–6) children use symbols and pretend play but think egocentrically and fail conservation (pre-operational); in middle childhood (6–11) they think logically about concrete things. Adolescence brings puberty, abstract thinking, the search for identity and challenges such as peer pressure, delinquency, substance use and eating disorders. Adulthood brings career, marriage and parenthood; old age brings retirement, loss and wisdom.

4. Sensory, Attentional and Perceptual Processes

Senses and attention · Perception

Senses and Attention – A stimulus is any change we can pick up. Each sense organ (sense modality) picks one kind of stimulus, but only within limits: a stimulus must cross the absolute threshold to be noticed, and a change must cross the difference threshold. Attention then chooses. Selective attention picks a few stimuli from many, pulled by outside factors (size, loudness, movement, newness) and inside factors (needs, interests). Sustained attention keeps focus on one task for a long time, and it drops as time passes.
Perception: How the Brain Makes Sense – Perception is giving meaning to what the senses bring. We work bottom-up (parts to whole) and top-down (ideas guide what we see). The perceiver's needs, interests, expectations and mood shape it. Gestalt principles (figure-ground, proximity, similarity, closure, continuity) organise parts into wholes. Monocular and binocular cues give depth. Constancies keep size, shape and brightness stable. Illusions are perceptions that do not match reality, and culture changes how strongly we fall for them.

5. Learning

Conditioning · Other forms of learning

Learning by Conditioning – Learning is a fairly lasting change in behaviour that comes from practice or experience. In classical conditioning (Pavlov), a neutral stimulus paired with one that naturally causes a response starts to cause that response by itself. In operant conditioning (Skinner), behaviour is shaped by its consequences: reinforcement makes it more likely, punishment less likely. Timing, strength and type of stimuli, and the amount, delay and schedule of reinforcement decide how well learning happens. Key processes are acquisition, extinction, spontaneous recovery, generalisation and discrimination.
Other Forms of Learning – Not all learning is conditioning. In observational learning we copy models after watching what happens to them. In cognitive learning we learn by thinking: insight is a sudden solution, and latent learning stays hidden until needed. Verbal learning is learning words and lists (paired-associate, serial, free recall). Skill learning moves through cognitive, associative and autonomous phases. Motivation, preparedness and the right reinforcement help learning. Learning disabilities are difficulties in reading, writing, attention or maths in children of normal intelligence, and they respond to special teaching.

6. Human Memory

Memory systems · Forgetting and enhancing memory

Human Memory: How We Keep Information – Memory keeps information over time. It works in three steps: encoding, storage and retrieval. The stage model says information passes from sensory memory (huge, about a second) to short-term memory (about 7 items, about 20 seconds) and, with rehearsal, to long-term memory (unlimited, years). Short-term memory works as working memory. The levels of processing view says deeper, meaning-based processing gives longer memory. Long-term memory has declarative memory (episodic and semantic) and procedural memory.
Forgetting and How to Remember Better – Forgetting is fast at first and then slow (Ebbinghaus curve). Three main reasons: trace decay (unused traces fade), interference (old and new learning block each other: proactive and retroactive) and retrieval failure (the memory is there but the right cue is missing). We can improve memory with mnemonics using images (keyword method, method of loci) and organisation (chunking, first-letter technique, categories), plus deep processing, less interference, spaced revision and the PQRST method.

7. Thinking

Thinking and problem solving · Creativity and language

Thinking, Problem Solving and Reasoning – Thinking means working on information in the mind to reach a goal. Its building blocks are mental images and concepts. We use thinking to solve problems (step by step, watching out for mental set and functional fixedness), to reason (deductive: rule to case; inductive: cases to rule) and to make judgements and decisions.
Creative Thinking, Thought and Language – Creative thinking produces ideas that are new and useful. It passes through preparation, incubation, illumination and verification, and mixes divergent (many ideas) with convergent (one best answer) thinking. Thought and language are closely linked (Whorf, Piaget, Vygotsky). Children develop language in fixed stages, helped by learning and by an inborn readiness.

8. Motivation and Emotion

Motivation · Emotion

Motivation, Motives and Maslow's Hierarchy of Needs – Motivation is the force that starts, directs and keeps up behaviour towards a goal. It works as a cycle: need → drive → action → goal → relief. Motives are biological (hunger, thirst, sleep, sex; kept in balance by homeostasis) or psychosocial (affiliation, power, achievement, curiosity). Maslow arranged needs in a pyramid from body needs up to self-actualisation.
Emotions: Nature, Expression, Culture and Management – An emotion is a strong feeling with three parts: body arousal, a thought or appraisal of the event, and an outward expression. There are a few basic emotions that vary in intensity and can mix. Emotions are shown by face, voice and body; basic facial expressions are widely shared, but culture sets display rules. Negative emotions can be managed (awareness, reappraisal, relaxation, exercise, support) and positive ones built (gratitude, hope, kindness, friends, flow).