IBDP Psychology SL
IB Diploma Programme Psychology SL is a rigorous Group 3 course that introduces students to the scientific study of human behaviour and mental processes through three core theoretical lenses — biological, cognitive, and sociocultural — and two in-depth option areas chosen from Abnormal Psychology, Developmental Psychology, Health Psychology, and the Psychology of Human Relationships.The biological approach examines how genetics, neurochemistry, brain structure, and evolutionary pressures shape behaviour. Students explore landmark research on neuroplasticity, the role of hormones and neurotransmitters, and the ethical complexities of animal research. The cognitive approach investigates how mental representations, schemas, and information-processing models explain perception, memory, and decision-making, including the growing influence of digital technology on cognition. The sociocultural approach explores how group membership, cultural norms, social identity, and globalization influence individual attitudes and behaviour, drawing on Tajfel's social identity theory, Bandura's social cognitive theory, and Hofstede's cultural dimensions framework.Research methodology is woven throughout the course rather than treated as a standalone unit. Students learn to evaluate experimental, correlational, case study, observational, and qualitative designs; apply ethical principles; and interpret descriptive statistics. This methodological literacy culminates in the Internal Assessment — a 1,500–2,000 word report of a simple experimental study that replicates or extends a published psychological investigation.External assessment comprises Paper 1 (core approaches, short-answer and extended response) and Paper 2 (option essays), together accounting for 75% of the final grade. The remaining 25% comes from the internally assessed experimental report.AccelaStudy's adaptive platform maps every learning goal to the IB assessment objectives (AO1–AO4), delivers spaced-repetition practice aligned to IB command terms, and provides contrastive study pairs that sharpen students' ability to compare and evaluate competing theories and studies — the core skill tested in extended-response questions.
210
Minutes
60
Questions
4/7
Passing Score
$173
Exam Cost
Who Should Take This
This course is ideal for IB Diploma students taking Psychology at Standard Level who want a structured, research-backed study companion. It suits learners who are new to psychology and need to build conceptual foundations, as well as those who already have some background and want to deepen their ability to evaluate research and construct exam-quality arguments. Students planning to study psychology, medicine, education, social work, neuroscience, or any social science at university will find the course particularly valuable. It is also well suited to students who want to strengthen their understanding of research methodology for the Internal Assessment.
What's Covered
1Genetics and behaviour, animal research, neuroplasticity, neurotransmitters and hormones, localization of brain function, evolutionary explanations of behaviour
2Schema theory, cognitive processing models, reliability of cognitive processes, emotion and cognition, cognitive processing in the digital world
3Social identity theory, social cognitive theory, cultural dimensions, acculturation, influence of globalization on individual attitudes and behaviour
4Two options studied in depth; each option covers three topics with associated research studies, explanations, and treatments or interventions
51,500–2,000 word report replicating or extending a published psychological study; includes introduction, exploration, analysis, evaluation, and references sections
What's Included in AccelaStudy® AI
Adaptive Knowledge Graph
Practice Questions
Lesson Modules
Console Simulator Labs
Exam Tips & Strategy
13 Activity Formats
Course Outline
1Biological Approach to Understanding Behaviour 3 topics
Genetics and Behaviour
- Outline the principles of the biological approach to psychology, including the role of genetics, neurochemistry, and brain structure in shaping human behaviour and mental processes.
- Explain how genetic inheritance influences behaviour using relevant research evidence, distinguishing between genotype and phenotype and discussing gene–environment interactions.
- Evaluate the use of twin studies and adoption studies as research methods for investigating the relative contributions of genetic and environmental factors to behaviour.
Neurotransmitters, Hormones, and Brain Function
- Describe the role of neurotransmitters and hormones in regulating behaviour, identifying key examples such as serotonin, dopamine, adrenaline, and oxytocin and their associated behavioural effects.
- Explain the concept of neuroplasticity and apply it to real-world examples of how the brain changes in response to experience, learning, injury, or environmental stimulation.
- Evaluate research studies investigating localization of brain function, including the use of case studies and neuroimaging techniques, discussing strengths and limitations of each method.
Animal Research and Evolutionary Explanations
- Discuss the use of animal models in psychological research, explaining the ethical and methodological considerations involved and the extent to which findings can be generalized to humans.
- Explain evolutionary explanations of behaviour, applying the concepts of natural selection and adaptive advantage to at least one specific human behaviour such as aggression or mate selection.
2Cognitive Approach to Understanding Behaviour 2 topics
Cognitive Processing and Schema Theory
- Outline the key assumptions of the cognitive approach to psychology, including the use of mental representations, information-processing models, and the computer analogy of the mind.
- Explain schema theory and apply it to examples of how pre-existing knowledge structures influence perception, memory encoding, and social judgement in everyday contexts.
- Evaluate the reliability of cognitive processes such as memory and perception, using research evidence to discuss factors that lead to distortion, bias, or reconstructive errors.
Emotion, Cognition, and Digital Technology
- Explain the interaction between emotion and cognition, applying relevant research to show how emotional states influence attention, memory consolidation, and decision-making processes.
- Discuss how cognitive processing is affected by digital technology and social media, evaluating research on multitasking, attention span, and the reliability of information processing in digital environments.
- Evaluate research methods used in cognitive psychology, including laboratory experiments and cognitive neuroscience techniques, discussing issues of ecological validity and reductionism.
3Sociocultural Approach to Understanding Behaviour 2 topics
Social Identity and Social Cognitive Theory
- Outline the key assumptions of the sociocultural approach, including the influence of social norms, group membership, cultural context, and interpersonal processes on individual behaviour.
- Explain social identity theory, applying concepts of in-group favouritism, out-group discrimination, and social categorization to real-world examples of intergroup behaviour and prejudice.
- Explain social cognitive theory, applying Bandura's concepts of observational learning, modelling, self-efficacy, and reciprocal determinism to explain the acquisition and maintenance of behaviour.
Culture, Acculturation, and Globalization
- Describe cultural dimensions frameworks such as Hofstede's model, identifying how dimensions including individualism–collectivism and power distance relate to differences in behaviour across cultures.
- Explain the concept of acculturation and apply Berry's acculturation framework to discuss how individuals adapt psychologically when moving between cultural contexts.
- Discuss the influence of globalization on individual attitudes, identity, and behaviour, evaluating research evidence on cultural convergence, hybridization, and resistance to global cultural norms.
- Evaluate the extent to which psychological research is culturally biased, discussing concepts of ethnocentrism, imposed etic, and the need for cross-cultural replication of findings.
4Research Methodology in Psychology 2 topics
Research Designs and Methods
- Identify and describe the major research designs used in psychology, including experimental, correlational, case study, observational, and survey designs, stating the key features of each.
- Explain the distinction between independent, dependent, and extraneous variables in experimental designs, and apply these concepts to evaluate the internal validity of psychological studies.
- Distinguish between laboratory, field, and natural experiments, explaining how each design affects control, ecological validity, and the ability to establish cause-and-effect relationships.
- Evaluate the use of qualitative research methods including interviews, observations, and case studies, discussing issues of credibility, transferability, and researcher bias in data collection and analysis.
Sampling, Ethics, and Data Analysis
- Describe sampling techniques used in psychological research including random, opportunity, purposive, and snowball sampling, identifying the strengths and limitations of each for generalizability.
- Explain the ethical principles governing psychological research, including informed consent, right to withdraw, debriefing, confidentiality, and protection from harm, applying them to specific study scenarios.
- Discuss the use of descriptive statistics in psychological research, including measures of central tendency and dispersion, and explain how these are used to summarize and interpret quantitative data.
- Evaluate the concepts of reliability and validity in psychological research, distinguishing between internal and external validity, test–retest reliability, and inter-rater reliability with reference to specific studies.
5Option: Abnormal Psychology 2 topics
Concepts of Normality, Abnormality, and Diagnosis
- Describe the concepts of normality and abnormality in psychology, outlining criteria used to define abnormal behaviour including statistical infrequency, deviation from social norms, and failure to function adequately.
- Explain the use of classification systems such as the DSM and ICD in diagnosing psychological disorders, discussing the role of reliability and validity in psychiatric diagnosis.
- Discuss the ethical implications of psychiatric diagnosis, including the impact of labelling, stigma, and cultural bias on individuals diagnosed with psychological disorders.
Explanations and Treatments of Disorders
- Explain biological, cognitive, and sociocultural explanations for one or more psychological disorders, applying relevant research evidence to support each explanatory perspective.
- Describe biological treatments for psychological disorders including drug therapies, explaining the mechanisms of action and evaluating their effectiveness and ethical considerations.
- Explain psychological treatments for disorders such as cognitive behavioural therapy (CBT), applying theoretical principles to show how the treatment addresses cognitive distortions and maladaptive behaviours.
- Evaluate the effectiveness of biomedical and psychological treatments for a specific disorder, comparing their relative merits using research evidence and considering individual and cultural factors.
6Option: Developmental Psychology 2 topics
Cognitive and Social Development
- Describe Piaget's theory of cognitive development, identifying the four stages and key concepts including schemas, assimilation, accommodation, and equilibration with supporting research evidence.
- Explain Vygotsky's sociocultural theory of cognitive development, applying concepts of the zone of proximal development and scaffolding to educational and developmental contexts.
- Evaluate the influence of attachment on social and emotional development across the lifespan, applying Bowlby's attachment theory and Ainsworth's Strange Situation research to developmental outcomes.
Identity, Adolescence, and Influences on Development
- Explain Erikson's psychosocial theory of development, applying the concept of identity formation during adolescence and discussing the role of identity crisis and resolution across life stages.
- Discuss the influence of peers, family, and media on adolescent identity development, evaluating research evidence on the relative impact of these socialization agents on behaviour and self-concept.
- Evaluate the role of gender and culture in shaping developmental outcomes, discussing research evidence on cross-cultural variations in developmental milestones and the social construction of gender roles.
7Option: Health Psychology 2 topics
Stress, Health Behaviour, and Models of Health
- Describe the biopsychosocial model of health and illness, identifying how biological, psychological, and social factors interact to influence health outcomes and contrasting it with the biomedical model.
- Explain the physiological and psychological effects of stress, applying Selye's General Adaptation Syndrome and the transactional model of stress to explain individual differences in stress responses.
- Evaluate strategies for coping with stress, including problem-focused and emotion-focused coping, social support, and mindfulness-based interventions, using research evidence to assess their effectiveness.
Health Promotion and Addictive Behaviour
- Explain models of health behaviour change such as the Health Belief Model and the Transtheoretical Model, applying them to explain why individuals adopt or fail to adopt healthy behaviours.
- Discuss biological, cognitive, and sociocultural explanations for the development and maintenance of addictive behaviour, evaluating the relative contribution of each perspective using research evidence.
- Evaluate the effectiveness of health promotion campaigns and interventions designed to reduce addictive or unhealthy behaviours, discussing factors that influence their success across different populations.
8Option: Psychology of Human Relationships 2 topics
Prosocial Behaviour, Altruism, and Cooperation
- Describe the factors that influence prosocial behaviour and bystander intervention, identifying situational and dispositional variables that promote or inhibit helping behaviour in social contexts.
- Explain biological and sociocultural explanations for altruism and cooperation, applying concepts of kin selection, reciprocal altruism, and social norms to account for helping behaviour across cultures.
- Evaluate research on the bystander effect and diffusion of responsibility, discussing methodological and ethical issues in classic studies and considering the relevance of findings to contemporary digital social environments.
Interpersonal Relationships and Conflict
- Explain theories of interpersonal attraction and relationship formation, applying factors such as proximity, similarity, physical attractiveness, and reciprocity to account for the development of close relationships.
- Discuss the origins and consequences of violence and conflict in human relationships, evaluating biological, cognitive, and sociocultural explanations for aggression and interpersonal violence.
- Evaluate the effectiveness of conflict resolution strategies and interventions designed to reduce interpersonal and intergroup violence, using psychological research to assess their applicability across cultural contexts.
9Internal Assessment: Simple Experimental Study 2 topics
IA Design and Ethical Compliance
- Identify an appropriate published psychological study to replicate or extend, stating a clear research question, null hypothesis, and directional or non-directional alternative hypothesis for the experimental investigation.
- Explain the experimental design chosen for the IA, justifying the selection of independent and dependent variables, operationalization of variables, control procedures, and sampling method used.
- Discuss the ethical considerations relevant to the IA study, demonstrating how informed consent, right to withdraw, debriefing, and confidentiality were addressed in the research procedure.
IA Analysis, Evaluation, and Report Writing
- Calculate and present descriptive statistics for IA data, including measures of central tendency and dispersion, constructing appropriate tables and graphs to display results clearly and accurately.
- Evaluate the findings of the IA study in relation to the original research, discussing whether results support or refute the hypothesis and identifying limitations of the design and potential confounding variables.
- Discuss modifications that could improve the IA study, suggesting how changes to design, sampling, or procedure would address identified limitations and increase the validity and reliability of findings.
10Integrative and Cross-Cutting Skills 1 topic
Evaluating Research and Constructing Arguments
- Evaluate the use of multiple perspectives (biological, cognitive, sociocultural) to explain a single psychological phenomenon, discussing the strengths and limitations of each approach and the value of an integrated explanation.
- Discuss the role of ethical considerations in shaping the conduct and interpretation of psychological research, evaluating how ethical constraints influence research design choices and the conclusions that can be drawn.
- Evaluate the extent to which psychological research can be considered scientific, discussing issues of falsifiability, replication, objectivity, and the replication crisis in relation to specific psychological studies.
- Discuss the influence of gender, culture, and socioeconomic factors as variables in psychological research, evaluating how these factors affect the generalizability and applicability of psychological findings.
Scope
Included Topics
- Three core approaches: Biological, Cognitive, and Sociocultural — covering key assumptions, research studies, and explanations of human behaviour at SL depth
- Two SL options (chosen from Abnormal psychology, Developmental psychology, Health psychology, Psychology of human relationships) — each studied in full at SL depth
- Research methodology throughout all units: experimental, correlational, case study, interview, observation, and survey designs; ethical considerations in psychological research
- Qualitative and quantitative research methods including content analysis, thematic analysis, and basic descriptive statistics
- Biological approach: genetics and behaviour, the role of animal research, neuroplasticity, neurotransmitters and hormones, localization of brain function, evolutionary explanations
- Cognitive approach: schema theory, cognitive processing models, reliability of cognitive processes, emotion and cognition, cognitive processing in the digital world
- Sociocultural approach: social identity theory, social cognitive theory, cultural dimensions, acculturation, the influence of globalization on individual attitudes and behaviour
- Internal assessment: simple experimental study (SL: 1,500–2,000 words) replicating or extending a published psychological study, with full report including introduction, exploration, analysis, evaluation, and references
- Four assessment objectives (AO1 knowledge, AO2 application, AO3 synthesis/evaluation, AO4 research skills) and IB command terms taxonomy
- Ethical considerations in psychological research: informed consent, deception, debriefing, confidentiality, right to withdraw, protection from harm
Not Covered
- HL-only extensions: the Biological, Cognitive, and Sociocultural approaches at HL depth (additional studies and concepts beyond SL requirements)
- HL-only qualitative research component and HL Internal Assessment extensions
- Clinical psychology as a standalone unit (covered only within Abnormal psychology option at SL depth)
- Neuroscience laboratory techniques beyond conceptual understanding (e.g., fMRI data analysis, EEG interpretation at technical level)
- Statistical inferential testing beyond descriptive statistics (t-tests, chi-square, ANOVA — not required at SL)
- Psychopharmacology at pharmacokinetic/pharmacodynamic depth beyond syllabus scope
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