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QCE Psychology: complete 2026 guide to Units 3 and 4 (General subject)

A complete 2026 guide to QCE General Psychology Units 3 and 4. Unit 3 (Individual thinking) and Unit 4 (The influence of others) for Year 12, the IA1 data test, IA2 student experiment, IA3 research investigation and External Assessment, how the marks combine into your subject result, and links to every dot-point answer we have for QCE Psychology.

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QCE General Psychology Units 3 and 4 is the Year 12 sequence assessed across three internal assessments (IAs) and one External Assessment (EA). Unit 3 (Individual thinking) is the priority for the early internal assessments, and Unit 4 (The influence of others) is the home of the research investigation. Both Units 3 and 4 are examined in the EA.

This page is the index. Below you will find every dot-point answer we have for QCE Psychology in 2026, organised by unit and topic, alongside the structural notes you need to plan study.

The QCE Psychology units in 2026

Unit 1 and Unit 2 (Year 11)
The foundation units introduce psychological science, research methods, ethics, the individual in developmental and lifespan contexts, and an introduction to topics such as intelligence and diagnosis. They are assessed school-internally at satisfactory level only and form the assumed knowledge base for Year 12.
Unit 3: Individual thinking
This unit examines how individual thinking is determined by the brain and by cognition. It covers localisation of brain function and neuroplasticity, brain trauma and neurological disorders, cognitive development (Piaget and Vygotsky), perception and attention, models of memory, theories of learning, theories of intelligence and emotional intelligence, and the diagnosis and classification of psychological disorders.
Unit 4: The influence of others
This unit examines how others shape the individual through social psychology. It covers status and power, conformity and obedience, social identity and prejudice, attitudes and cognitive dissonance, how group membership changes cognition and emotion, and prosocial and antisocial behaviour.

The four instruments in 2026 (Units 3 and 4 only)

IA1: Data test
A school-based response to previously unseen data sets drawn from Unit 3 stimulus. It tests interpretation of psychological data, identification of trends, and claim-evidence-reasoning under time pressure. Commonly weighted at 10 percent of the subject result.
IA2: Student experiment
A student-designed and conducted experimental investigation drawn from Unit 3 subject matter, reported as a scientific report. Strong reports state a researchable question, justify the design against psychological theory, present processed data with appropriate analysis, and evaluate validity and reliability. Commonly weighted at 20 percent.
IA3: Research investigation
A research-only investigation in Unit 4 context, evaluating a claim using secondary data and reported as a scientific article. Strong reports frame a tight researchable question linked to a Unit 4 dot point and evaluate the quality of the evidence. Commonly weighted at 20 percent.
EA: External Assessment
A centrally-set examination at the end of Unit 4, cumulative across Units 3 and 4, combining multiple choice, short response and extended or combined response with stimulus. Commonly weighted at 50 percent of the subject result.

Our 2026 QCE Psychology dot-point answers

Every link below is a focused answer to one QCAA subject-matter dot point. Each page identifies the dot point, gives the worked answer with named studies, and cross-links to related dot points.

Unit 3: Individual thinking

Unit 3 is examined in the EA and is the source of IA1 (data test) and IA2 (student experiment). It covers the brain, cognition, intelligence and diagnosis.

Unit 4: The influence of others

Unit 4 is examined in the EA and is the source of IA3 (research investigation). It covers social influence, attitudes and group processes.

How Unit 3 maps to the IAs

IA1 data test. Expect stimulus drawn from across Unit 3: reaction-time and perception data, memory-recall curves, conditioning results, IQ score distributions and diagnostic statistics. Mark accuracy on identifying trends, reading graphs precisely, and explicitly linking the data to the psychological concept.

IA2 student experiment. Common IA2 designs investigate a cognitive variable, such as the effect of divided attention or chunking on memory recall, the serial position effect, the Stroop effect on reaction time, or the influence of context on perception. Strong reports identify a researchable question, operationalise variables, control extraneous variables, present processed data, and evaluate validity, reliability and ethics.

How Unit 4 maps to the IA and EA

IA3 research investigation. Unit 4 is the home of IA3. The investigation is a research-only secondary-data review, typically on a social-psychology claim such as the conditions that increase obedience or conformity, the effectiveness of persuasion techniques, the reality of the bystander effect, or interventions that reduce prejudice. Strong reports link the question to a Unit 4 dot point and evaluate the validity and reliability of the cited research.

EA examination. Unit 4 contributes roughly half the EA marks. Expect short-response items on named studies (Asch, Milgram, Festinger, Darley and Latane) and extended-response items that integrate social theory with stimulus, such as evaluating an explanation of conformity or analysing a scenario through social identity theory.

How to use this hub

If you are starting Unit 3 this term: read localisation and perception first, then memory and learning, before intelligence and diagnosis. IA1 stimulus pulls from across the unit, so build complete coverage before drilling speed.

If you are designing your IA2: read the dot point most relevant to your chosen cognitive variable (memory, attention or perception), then build a tightly controlled experiment with a clear independent and dependent variable.

If you are 6 weeks from the EA: revise the full Unit 3 set, then complete Unit 4. Attach a named study to every concept, because examiners reward evidence-based answers over general description. Past EA papers released by QCAA are the best practice resource.

The system around QCE Psychology

QCE Psychology sits inside the wider QCE system. Related explainers:

Every guide on this hub was written by ExamExplained. For the official QCAA Psychology General Senior Syllabus, IA specifications and past EA papers, refer to qcaa.qld.edu.au.

The QCE system, explained

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Common questions about Psychology

How is QCE Psychology structured in 2026?
QCE General Psychology runs across four units. Units 1 and 2 (Year 11) are assessed school-internally at satisfactory level only and build the assumed knowledge base. Units 3 and 4 (Year 12) produce the subject result through three internal assessments and one External Assessment. Based on the QCAA science assessment model, IA1 is a data test, IA2 is a student experiment, IA3 is a research investigation, and the EA is a centrally-set examination. Confirm the exact weightings against the current QCAA Psychology General Senior Syllabus, as the science weightings are commonly 10, 20, 20 and 50 percent.
What is in QCE Psychology Unit 3?
Unit 3 is Individual thinking. It examines how individual thinking is shaped by the brain and cognition, covering localisation of brain function and the nervous system, perception and attention, models of memory, theories of learning, theories of intelligence, and the diagnosis and classification of psychological disorders. Unit 3 is the focus of the early internal assessments and is examined in the EA.
What is in QCE Psychology Unit 4?
Unit 4 is The influence of others. It examines social psychology and how others shape the individual, covering conformity and obedience, attitudes and attitude change, and how group membership changes cognition and emotion through processes such as groupthink, deindividuation and the bystander effect. Unit 4 is the focus of the later research investigation and contributes roughly half of the EA.
Which psychologists and studies do I need for QCE Psychology?
Use named studies in every answer. Core names include Broca, Wernicke, Sperry and Gazzaniga for the brain, Atkinson and Shiffrin and Baddeley and Hitch for memory, Pavlov, Skinner and Bandura for learning, Spearman, Gardner and Sternberg for intelligence, Rosenhan for diagnosis, Asch, Milgram and Zimbardo for social influence, Festinger for attitudes, and Janis and Darley and Latane for group processes. Examiners reward a named study attached to each claim.
How does the QCE Psychology EA work?
The External Assessment is a centrally-set examination sat in the assessment block at the end of Unit 4, cumulative across Units 3 and 4. It combines multiple choice, short response and extended or combined response with stimulus. Based on the QCAA science model it contributes 50 percent of the subject result; confirm the exact paper structure and weighting against the current syllabus.
How does Psychology scale for the QCE ATAR?
Psychology sits in the top-five General subjects aggregate for ATAR. QCAA does not pre-scale subjects; QTAC scales the cohort distribution at the end of the year. Psychology is a popular, broad-cohort subject, so very high results scale a touch less aggressively at the top than the smaller hard sciences. For specific year-on-year figures, check the most recent QTAC scaling report.