(a) What makes psychology a science? Discuss. (10 marks) (b) Citing relevant examples, explain independent, dependent and…

(a) Psychology as a science

Psychology is a science because it studies behaviour and mental processes through systematic empiricism: observations are planned, recorded, and subjected to controlled or comparative analysis. It formulates concepts, constructs theories, and derives hypotheses that can be tested, revised, or rejected; falsifiability, in Popper’s sense, is an important criterion, though not every qualitative or clinical formulation is strictly falsifiable. Replicability, measurement, and cumulative theory-building distinguish it from pseudoscience, which relies on vague claims and immune-to-failure authority. Its methodological pluralism—quantitative experiments, qualitative interviews, neuroimaging, and field studies—allows it to address both general laws and individual meaning. For example, an Indian study on exam stress can operationalise stress, measure cortisol or self-report, and test whether an intervention reduces anxiety, making the claim empirically accountable.

(b) Variables

In research, the independent variable is the cause or condition manipulated or selected by the researcher; the dependent variable is the outcome measured; the mediating variable is the intervening mechanism that explains how the independent variable affects the dependent variable. For instance, in an Indian classroom experiment, the independent variable may be exam pressure created by a timed, high-stakes test; the dependent variable may be academic performance measured by marks or working-memory task scores. A mediator could be threat appraisal: pressure increases the perception of threat, which raises test anxiety and narrows attention, thereby lowering performance. This differs from moderation, where a third variable changes the strength of the relation. Operational clarity is essential: if pressure is manipulated, anxiety is measured, and performance is scored, the causal chain can be tested.

(c) Data collection

Psychology uses several data-collection methods. Experiments establish causality by manipulating an independent variable and controlling extraneous factors; case studies give in-depth description of rare or complex cases; psychological tests assess abilities, traits, or disorders; archival research uses existing records such as school registers or hospital data. Observation is especially important: structured observation uses predefined categories and time or event sampling, such as counting aggressive acts in a Delhi schoolyard; unstructured observation records open-ended behaviour, useful in exploratory studies. Participant observation involves joining the setting, while non-participant observation maintains distance. Survey methods collect self-report data through questionnaires, interviews, and standardised scales. They are economical and can reach large Indian populations, but are limited by social desirability, recall bias, and language validity. Ethical care—consent, anonymity, and cultural sensitivity—is required in all methods.

(d) Growth and development

Growth refers mainly to quantitative biological changes—height, weight, brain size—whereas development is broader, including quantitative and qualitative changes in cognition, emotion, language, and social competence. Growth is thus a subset of development, not its opposite; it is more specific and biological, while development is holistic and person-level. Baltes’ life-span principles include multidimensionality (physical, cognitive, socio-emotional), multidirectionality (gains and losses across life), plasticity (change remains possible), contextualism (shaped by environment), multiple causality, and interdisciplinary explanation. Bronfenbrenner’s ecological systems clarify this: the microsystem includes family and school; the mesosystem links home and school; the exosystem includes parents’ workplaces and policies; the macrosystem includes caste, gender, religion, and national culture; the chronosystem includes historical change. In India, a child’s development is affected by joint-family support, school quality, urban migration, and digital access.

(e) Classical conditioning

Classical conditioning helps form likes and preferences through repeated association. A neutral stimulus (NS), such as a particular brand jingle, is paired with an unconditioned stimulus (US), such as a pleasant taste or social approval, that naturally produces liking. After acquisition, the NS becomes a conditioned stimulus (CS) and can elicit a conditioned response of preference. Generalisation extends liking to similar stimuli, such as other products with similar colours or music. Higher-order conditioning allows a new stimulus, such as a celebrity image, to acquire liking because it is paired with an already liked CS. Extinction weakens the preference if the CS is repeatedly presented without the US. In Indian consumer life, repeated pairing of a food with festive family gatherings can create lasting taste preferences, while advertising uses these principles to shape aesthetic and brand tastes. The same logic can create dislikes, as a child bitten by a dog may generalise fear to all furry animals.