All 8 questions from UPSC Civil Services Mains Psychology 2026 Paper I (400 marks total). Every stem reproduced in full, with directive-word analysis, marks, word limits, and answer-approach pointers.
8Questions
400Total marks
2026Year
Paper IPaper
A
Q1
50M150wCompulsorydiscuss
Answer the following questions in about 150 words each :
(a) Discuss various applications of psychology with reference to war and peace. (10 marks)
(b) Discuss the role of environmental factors in prenatal development. (10 marks)
(c) Differentiate among descriptive, evaluative, diagnostic and prognostic research. (10 marks)
(d) “Negative reinforcement and punishment are different.” Justify your point of view with relevant examples. (10 marks)
(e) How do the ‘leaky bucket’ and ‘working memory’ approaches differ in their explanation of the short-term memory? (10 marks)
हिंदी में पढ़ें
निम्नलिखित में से प्रत्येक प्रश्न का उत्तर लगभग 150 शब्दों में दीजिए :
(a) युद्ध और शांति के संबंध में मनोविज्ञान के विभिन्न अनुप्रयोगों पर चर्चा कीजिए। (10 अंक)
(b) प्रसवपूर्व विकास में पर्यावरणीय कारकों की भूमिका पर चर्चा कीजिए। (10 अंक)
(c) वर्णनात्मक, मूल्यांकनात्मक, निदानात्मक तथा पूर्वानुमानात्मक अनुसंधान के बीच अंतर स्पष्ट कीजिए। (10 अंक)
(d) “नकारात्मक प्रबलन और दंड भिन्न हैं।” प्रासंगिक उदाहरणों द्वारा अपने दृष्टिकोण को उचित सिद्ध कीजिए। (10 अंक)
(e) अल्पकालिक स्मृति (short-term memory) की व्याख्या करने में ‘लीकी बकेट’ तथा ‘क्रियाशील स्मृति (working memory)’ दृष्टिकोण किस प्रकार भिन्न हैं? (10 अंक)
Answer approach & key points
(a) 'Discuss' requires the candidate to lay out, with examples, how psychological knowledge is actually applied in BOTH contexts named: war (military/defence settings) and peace (conflict reduction, reconciliation, rehabilitation). An answer covering only military psychology, or only peace psychology, is half-answered. (b) 'Discuss the role of environmental factors in prenatal development' asks for the teratogenic and maternal-environmental influences acting between conception and birth, the principles governing their effect (critical period, dose-response, individual susceptibility), and named outcomes. Genetic/chromosomal causes are NOT environmental and should be mentioned only as a contrast. (c) 'Differentiate among' requires all FOUR research types - descriptive, evaluative, diagnostic and prognostic - to be distinguished on a common set of criteria (purpose, question answered, typical design, output) with an illustrative psychological example of each. A four-way comparison is mandatory; describing only some of them cannot pass. (d) The statement must be JUSTIFIED (not merely explained): show that negative reinforcement and punishment are conceptually distinct by contrasting their effect on response probability and the operation performed, and prove it with at least two concrete examples of each. The four-cell operant contingency table (positive/negative x reinforcement/punishment) is the expected scaffolding. (e) A two-model contrast: explain how the 'leaky bucket' conception (the passive short-term store of Atkinson and Shiffrin's modal model) accounts for short-term memory, how Baddeley and Hitch's working-memory model accounts for it, and state precisely how they DIFFER - in architecture, in the cause of forgetting, and in the evidence each explains.
Army Alpha and Army Beta tests, Robert Yerkes, 1917
(a) Critically examine the top-down and bottom-up processing in perception. How can we make the combined use of both the processing in everyday life? Support your answer with appropriate examples. (20 marks)
(b) What makes psychology a more scientific discipline in comparison to other disciplines of social sciences? Elucidate your answer with examples and evidences. (15 marks)
(c) In what ways can sampling bias affect the accuracy of research outcomes? Discuss the role of data analysis and interpretation in generating meaningful research findings. (15 marks)
हिंदी में पढ़ें
(a) प्रत्यक्षीकरण में अधोशीर्ष (top-down) प्रक्रम तथा उर्ध्वगामी (bottom-up) प्रक्रम का आलोचनात्मक परीक्षण कीजिए। हम दैनिक जीवन में दोनों प्रक्रमों का संयुक्त उपयोग कैसे कर सकते हैं? अपने उत्तर का समर्थन उपयुक्त उदाहरणों द्वारा कीजिए। (20 अंक)
(b) सामाजिक विज्ञान के अन्य विषयों की तुलना में क्या मनोविज्ञान को एक अधिक वैज्ञानिक विषय बनाता है? अपने उत्तर को उदाहरणों और साक्ष्यों के साथ स्पष्ट कीजिए। (15 अंक)
(c) प्रतिचयन अभिनति (sampling bias) अनुसंधान परिणामों की सटीकता को किस प्रकार प्रभावित कर सकती है? अर्थपूर्ण अनुसंधान निष्कर्ष उत्पन्न करने में डेटा विश्लेषण तथा व्याख्या की भूमिका पर चर्चा कीजिए। (15 अंक)
Answer approach & key points
(a) Three linked demands: (i) explain top-down (conceptually driven) and bottom-up (data-driven) processing in perception; (ii) CRITICALLY examine them - i.e. give the evidence for and the limitations of each, not just definitions; and (iii) show how the two combine in everyday life, with appropriate examples. All three must be present. (b) 'Elucidate with examples and evidences' - argue what specifically makes psychology more scientific than the other social sciences (experimentation, measurement, replication, biological anchoring), substantiating each claim with a named study, instrument or method; a balanced answer should also concede the limits of that claim. (c) Two distinct parts, both marked: (i) how sampling bias distorts the accuracy of research outcomes - name its types, the validity it threatens and the remedies; and (ii) the role of data analysis and interpretation in producing meaningful findings, including the errors of interpretation to be avoided.
(a) Discuss various types of long-term memory. Explain how primacy and recency effect illustrate the serial position effect in transferring information from short-term memory to long-term memory. (20 marks)
(b) “The aim of grounded theory analysis is to develop inductive theory which is closely derived from the data.” Elaborate upon the statement with respect to the analytic procedures followed in the grounded theory approach. (15 marks)
(c) Under what research conditions would you choose multiple regression over simple linear regression? Explain the assumptions of multiple regression with the help of examples. (15 marks)
हिंदी में पढ़ें
(a) दीर्घकालिक स्मृति के विभिन्न प्रकारों पर चर्चा कीजिए। समझाइए कि प्राथमिकता (primacy) तथा अभिनवता (recency) प्रभाव कैसे क्रमिक स्थिति (serial position) प्रभाव को दर्शाते हैं, जब जानकारी को अल्पकालिक स्मृति से दीर्घकालिक स्मृति में स्थानांतरित किया जाता है। (20 अंक)
(b) “ग्राउंडेड थ्योरी विश्लेषण का उद्देश्य डेटा से सीधे आगमनात्मक सिद्धांत विकसित करना है।” ग्राउंडेड थ्योरी दृष्टिकोण में अनुसृत विश्लेषणात्मक प्रक्रियाओं के संदर्भ में इस कथन की विस्तृत व्याख्या कीजिए। (15 अंक)
(c) आप किन शोध स्थितियों में सरल रैखिक प्रतिगमन (simple linear regression) के बजाय बहु प्रतिगमन (multiple regression) का चयन करेंगे? बहु प्रतिगमन की मान्यताओं को उदाहरणों द्वारा समझाइए। (15 अंक)
Answer approach & key points
(a) Two connected demands: (i) discuss the types of long-term memory (declarative/explicit versus non-declarative/implicit, with their sub-types), and (ii) explain how the primacy and recency effects together constitute the serial position effect and what that reveals about the transfer of information from short-term to long-term memory. The second part must include the experimental evidence. (b) 'Elaborate upon the statement with respect to the analytic procedures' - the marks lie in describing grounded theory's actual procedures (coding stages, constant comparison, theoretical sampling, memoing, saturation, core category) and showing HOW each keeps the emerging theory inductively grounded in the data rather than imposed on it. (c) Two parts: (i) specify the research conditions under which multiple regression is preferred to simple linear regression, and (ii) explain each assumption of multiple regression with an illustrative example. Both the choice-criteria and the assumptions-with-examples must appear.
Declarative/explicit versus non-declarative/implicit (Squire's taxonomy)
Episodic memory - Tulving (1972)
Semantic memory
Procedural memory / priming / conditioning
Patient H.M. (Scoville and Milner, 1957)
Serial position effect - primacy and recency; Murdock (1962)
Glanzer and Cunitz (1966), 30-second filled delay abolishes recency
Rehearsal as the mechanism of STM-to-LTM transfer
Glaser and Strauss, The Discovery of Grounded Theory, 1967
Open coding, axial coding, selective coding
Constant comparative method
Theoretical sampling
Theoretical saturation
Core category
Memo writing
Strauss and Corbin (1990) / Charmaz (2006) constructivist version
Y = b0 + b1X1 + b2X2 + ... + bkXk + e
R-squared and adjusted R-squared; change in R-squared / incremental validity
Partial and semi-partial (part) correlation
Linearity, independence of errors, homoscedasticity, normality of residuals, no multicollinearity
VIF above 10 / tolerance below 0.10
Durbin-Watson; Cook's distance
At least one worked psychological example (e.g. achievement predicted from IQ, study hours, SES, anxiety)
(a) Explain how learning takes place through classical conditioning. Discuss the role of reflexive behaviour and contingency in the acquisition of conditioned behaviour. (20 marks)
(b) What do you understand by 'inattentional blindness'? How can subliminal stimulus affect our behaviour? (15 marks)
(c) Highlight the developmental milestones as per the Piaget's stages of cognitive development. (15 marks)
हिंदी में पढ़ें
(a) प्राचीन अनुबंधन (classical conditioning) में अधिगम की प्रक्रिया को समझाइए। अनुकूलित व्यवहार के अधिग्रहण में प्रतिवर्ती व्यवहार तथा आकस्मिकता की भूमिका पर चर्चा कीजिए। (20 अंक)
(b) 'इन्अटेंशनल ब्लाइंडनेस' से आप क्या समझते हैं? अवचेतन उद्दीपक (subliminal stimulus) हमारे व्यवहार को कैसे प्रभावित कर सकता है? (15 अंक)
(c) पियाजे के संज्ञानात्मक विकास के चरणों के अनुसार विकासात्मक पड़ावों पर प्रकाश डालिए। (15 अंक)
Answer approach & key points
(a) Explain the mechanism of classical conditioning (Pavlov's paradigm and its phenomena), then discuss two specified determinants of acquisition: reflexive (respondent, elicited) behaviour as the raw material on which conditioning operates, and contingency - the CS's predictiveness of the UCS - as distinct from mere contiguity. (b) Two parts: (i) define and illustrate inattentional blindness with its classic demonstration and its theoretical significance for attention; (ii) explain what a subliminal stimulus is and how far it can influence behaviour, with the evidence - including the negative and disputed evidence. (c) 'Highlight the developmental milestones as per Piaget's stages' - set out all four stages with their age ranges and, for each, the specific cognitive attainments and characteristic limitations that mark it. The organising concepts (schema, assimilation, accommodation, equilibration) frame the answer; a brief evaluation strengthens it.
Answer the following questions in about 150 words each :
(a) How does knowledge influence deductive reasoning? Give suitable examples. (10 marks)
(b) Explain the relationship between emotion and cognition. Examine how feelings shape our thoughts. (10 marks)
(c) Examine the role of causal attribution in the formation of prejudice and discrimination. (10 marks)
(d) How does the critical period hypothesis support the idea of biological predisposition? (10 marks)
(e) Do our dreams represent unconscious wish fulfillment? Discuss the meaning and functions of dreams. (10 marks)
हिंदी में पढ़ें
निम्नलिखित में से प्रत्येक प्रश्न का उत्तर लगभग 150 शब्दों में दीजिए :
(a) ज्ञान, निगमनात्मक तर्क को कैसे प्रभावित करता है? उपयुक्त उदाहरण दीजिए। (10 अंक)
(b) संवेग और संज्ञान के बीच के संबंध को समझाइए। जाँच कीजिए कि भावनाएँ हमारे विचारों को कैसे आकार देती हैं। (10 अंक)
(c) पूर्वाग्रह और भेदभाव के निर्माण में कारणात्मक गुणारोपण की भूमिका का परीक्षण कीजिए। (10 अंक)
(d) क्रांतिक अवधि परिकल्पना (critical period hypothesis) जैविक प्रवृत्ति के विचार का समर्थन कैसे करती है? (10 अंक)
(e) क्या हमारे सपने अचेतन इच्छाओं की पूर्ति का प्रतिनिधित्व करते हैं? सपनों के अर्थ तथा कार्यों पर चर्चा कीजिए। (10 अंक)
Answer approach & key points
(a) Show that deductive reasoning, though formally content-independent, is empirically affected by what the reasoner knows and believes - both facilitating (thematic and familiar content) and distorting (belief bias) - and support each claim with a named experimental paradigm and an example, as the question demands examples. (b) Two linked demands: explain the emotion-cognition relationship - showing it runs in both directions and naming the theoretical positions in the cognition-versus-affect primacy debate - and then examine specifically how feelings shape thought (memory, judgement, attention, creativity, decision making). (c) 'Examine the role of causal attribution' - show, with named attribution concepts and biases, how the way people explain the behaviour and outcomes of in-group and out-group members generates and sustains prejudice (an attitude) and discrimination (behaviour); a line on attribution-based remedies completes the answer. (d) Define the critical period hypothesis, and show with evidence how the existence of time-limited windows for acquiring particular behaviours argues that organisms are biologically prepared - genetically pre-programmed - to learn certain things at certain times, rather than being blank slates shaped only by experience. (e) Take a reasoned position on the Freudian wish-fulfilment claim - stating it accurately and evaluating it against the evidence - and then set out the meaning and the proposed functions of dreaming across the major alternative accounts.
Wason selection task (1966/1968) and its thematic versions
Belief bias - Evans, Barston and Pollard (1983)
At least one concrete syllogism or rule as an example
Pragmatic reasoning schemas (Cheng and Holyoak, 1985) or social contract theory (Cosmides, 1989)
Mental models (Johnson-Laird) or dual-process theory
Schachter and Singer (1962) two-factor theory
Lazarus - cognitive appraisal (primary and secondary)
Zajonc (1980) affective primacy / 'preferences need no inferences'
Heider (1958) - internal versus external attribution
Fundamental attribution error (Ross, 1977)
Ultimate attribution error (Pettigrew, 1979)
Just-world hypothesis (Lerner)
Prejudice as attitude versus discrimination as behaviour (Allport, 1954)
At least one remedy (contact, superordinate goals, jigsaw classroom, attributional retraining)
Critical period versus sensitive period
Konrad Lorenz, imprinting in greylag geese (1935)
Hubel and Wiesel, monocular deprivation, ocular dominance
Lenneberg (1967) critical period for language; Genie
Biological preparedness (Seligman, 1970) / Garcia and Koelling (1966)
Bowlby's attachment sensitive period or the Romanian adoptee studies
Freud, The Interpretation of Dreams (1900); wish fulfilment
Manifest and latent content; dream-work (condensation, displacement, symbolisation, secondary revision)
REM sleep - Aserinsky and Kleitman (1953)
Activation-synthesis hypothesis - Hobson and McCarley (1977)
At least one further function: memory consolidation, reverse learning (Crick and Mitchison, 1983), threat simulation (Revonsuo, 2000) or problem solving
(a) What do you mean by defense mechanism? Distinguish between healthy and unhealthy defense mechanisms. Explain how it influences personality of an individual. (20 marks)
(b) What kind of heuristics is used by the people while making decisions? Also, discuss the errors and biases in group decision making. (15 marks)
(c) How is crystallized intelligence different from fluid intelligence? Discuss their relation to ageing and memory. (15 marks)
हिंदी में पढ़ें
(a) रक्षा युक्ति से आप क्या समझते हैं? स्वस्थ और अस्वस्थ रक्षा युक्तियों के बीच अंतर स्पष्ट कीजिए। समझाइए कि यह किसी व्यक्ति के व्यक्तित्व को कैसे प्रभावित करती है। (20 अंक)
(b) लोग निर्णय लेते समय किस प्रकार की ह्यूरिस्टिक्स का उपयोग करते हैं? समूह निर्णय लेने में त्रुटियों और पूर्वाग्रहों पर भी चर्चा कीजिए। (15 अंक)
(c) क्रिस्टलित बुद्धि, तरल बुद्धि से किस प्रकार भिन्न है? उम्र बढ़ने तथा स्मृति से उनके संबंध पर चर्चा कीजिए। (15 अंक)
Answer approach & key points
(a) Three demands, all marked: (i) define defence mechanisms within Freudian ego psychology; (ii) distinguish healthy (mature/adaptive) from unhealthy (immature/maladaptive) mechanisms, ideally using Vaillant's hierarchy, with examples of each; (iii) explain how habitual defensive style shapes personality. (b) Two separately marked parts: (i) the heuristics people use in individual decision making, named and illustrated; (ii) the errors and biases specific to GROUP decision making. An answer confined to individual heuristics answers only half the question. (c) Two demands: (i) differentiate crystallised from fluid intelligence on definition, content, measurement and theoretical origin; (ii) discuss how each relates to ageing and to memory - the developmental trajectories and the memory systems each depends on.
Sigmund Freud; Anna Freud, The Ego and the Mechanisms of Defence (1936)
(a) Discuss the nature and functions of attitudes and values with reference to development of human behaviour. Suggest relevant strategies for attitude change and development. (20 marks)
(b) What do you mean by 'motivational cycle'? Analyze and answer with reference to psychological and physiological basis of motivation. (15 marks)
(c) Differentiate between surface and deep structure of language. Describe the hierarchy of language. (15 marks)
हिंदी में पढ़ें
(a) मानव व्यवहार के विकास के संदर्भ में अभिवृत्तियों और मूल्यों की प्रकृति और कार्यों की चर्चा कीजिए। अभिवृत्तियों में बदलाव और विकास के लिए प्रासंगिक रणनीतियों का सुझाव दीजिए। (20 अंक)
(b) 'प्रेरणात्मक चक्र' से आप क्या समझते हैं? मनोवैज्ञानिक और शारीर-क्रियात्मक आधार के संदर्भ में प्रेरणा का विश्लेषण करते हुए उत्तर दीजिए। (15 अंक)
(c) भाषा की सतही तथा गहरी संरचना के बीच अंतर स्पष्ट कीजिए। भाषा के पदानुक्रम का वर्णन कीजिए। (15 अंक)
Answer approach & key points
(a) Three demands, all marked: (i) the nature of attitudes and values - their definition, structure and distinction from each other; (ii) their FUNCTIONS with reference to the development of human behaviour; (iii) concrete strategies for attitude change and development, grounded in theory. (b) Define and trace the motivational cycle stage by stage, then analyse motivation on both the bases named - physiological (homeostasis, hypothalamic and neurochemical mechanisms) and psychological (learned, cognitive and social motives) - showing how each maps onto the cycle. (c) Two demands: (i) differentiate the surface structure from the deep structure of language in Chomsky's transformational generative grammar, with disambiguating examples; (ii) describe the hierarchy of language - the levels from phoneme upward to discourse, with the corresponding levels of linguistic analysis.
Allport's (1935) definition of attitude
ABC / tricomponent model
Rokeach (1973) terminal and instrumental values; or Schwartz's (1992) ten values
(a) Why do the people in almost every culture use psychoactive drugs? Discuss the effects of various stimulants and depressants on central nervous system. (20 marks)
(b) Distinguish between projective tests and psychometric tests of personality along with their advantages and disadvantages. (15 marks)
(c) Does IQ predict mental retardation? Explain the classification of mental retardation with regard to IQ scores given by Stanford-Binet. (15 marks)
हिंदी में पढ़ें
(a) क्यों लोग लगभग हर संस्कृति में मनोसक्रिय औषधियों का उपयोग करते हैं? विभिन्न उत्तेजक और अवसादक दवाओं के केंद्रीय तंत्रिका तंत्र पर पड़ने वाले प्रभावों की चर्चा कीजिए। (20 अंक)
(b) व्यक्तित्व के प्रक्षेपी परीक्षणों (projective tests) और मनोमितीय परीक्षणों के बीच अंतर स्पष्ट कीजिए, तथा उनके लाभ और हानियों का भी उल्लेख कीजिए। (15 अंक)
(c) क्या आई० क्यू० मानसिक मंदता का पूर्वानुमान लगा सकता है? स्टैनफोर्ड-बिनेट द्वारा दिए गए आई० क्यू० स्कोर के आधार पर मानसिक मंदता के वर्गीकरण की व्याख्या कीजिए। (15 अंक)
Answer approach & key points
(a) Two demands: (i) explain the near-universality of psychoactive drug use across cultures - the motivational, ritual, social and neurochemical reasons; (ii) discuss the CNS effects of stimulants and of depressants, each class named with its members, mechanisms and short- and long-term consequences. (b) Distinguish projective from psychometric (objective, self-report) personality tests on stimulus, response format, scoring, theoretical assumption and purpose, naming real tests of each kind, and state the advantages and disadvantages of each - which the question explicitly requires. (c) Two demands: (i) evaluate whether IQ alone predicts or diagnoses intellectual disability - a qualified answer is expected, because adaptive behaviour and age of onset are equally criterial; (ii) set out the classification of mental retardation by IQ score in the Stanford-Binet tradition, with the bands correctly stated.
Psychoactive drug; mesolimbic dopamine reward pathway (VTA to nucleus accumbens)