QCAA data test: what it is and how it works in each subject (QCE)
Quick answer: The QCAA data test is Internal Assessment 1 (IA1) in QCE Biology, Chemistry, Physics and Psychology. It is a supervised, individual test of 5 minutes perusal and 60 minutes working time on two to four datasets you have not seen, marked out of 10 and worth 10% of the subject. About 40% of the marks are for drawing conclusions from the data, so reading data well matters more than recalling theory.
This page describes the 2025 syllabuses for Year 12 students sitting IA1 in Unit 3. Your school writes and marks the test, QCAA endorses the task, and QCAA checks a sample of the school's marking through confirmation. For the subject's other assessments and its past papers, start at the Biology, Chemistry, Physics or Psychology subject page.
What is a QCAA data test?
A data test gives you datasets from Unit 3 practicals, activities or case studies and asks questions about them. You answer in single words, calculations, or sentences of up to 150 words per question. You may use a QCAA-approved graphics or scientific calculator. The Physics syllabus also lists the QCAA Physics formula and data book for the test.
It is one of three internal assessments in these subjects, alongside the student experiment (IA2) and the research investigation (IA3), and an external exam. Each subject's guide covers its own conditions in full.
How is the data test marked?
Out of 10, on one criterion, by percentage cut-off. Your raw score becomes a percentage, and each mark needs a percentage greater than its cut-off: more than 80% earns 9, so exactly 80% earns 8. Your mark follows your percentage, so there is no descriptor band to reach by writing more.
What do the questions ask for?
Every school's test has to match one question specifications table, within a 2% tolerance on each row.
| Focus of the question | Share of marks | Objective |
|---|---|---|
| Unknown quantities or features of the datasets (calculations) | About 30% | 2 |
| Trends, patterns, relationships, limitations or uncertainty | About 30% | 3 |
| Conclusions based on analysis of the datasets | About 40% | 4 |
Two habits follow. A conclusion question wants a conclusion: a marked Biology excerpt in QCAA's 2023 subject report was credited for the conclusion, the figure from the data that supports it, and the comparison that rules out the alternative. And a limitation has to come from the evidence in the dataset, not from the methodology, as the 2025 Biology report puts it.
How do you prepare for a test you cannot see?
Practise the skills, not the datasets. These transfer between the four subjects:
- Read the axes, units and variables before the question.
- Name the trend, then say what it means.
- Show working and units in every calculation.
- Tie limitations and uncertainty to the numbers you were given.
- Finish with a conclusion that the data actually supports.
Work questions under a 60 minute timer, then check where the marks went. The marked past-paper questions on each subject page are grouped by topic. The subject guides below cover each subject's conditions and what QCAA's subject reports say about its data tests.
Which data test guide is yours?
| Subject | Unit 3 subject matter the data is about | Guide |
|---|---|---|
| Biology | Biodiversity and populations, and functioning ecosystems and succession | QCE Biology IA1 data test |
| Chemistry | Chemical equilibrium systems, and oxidation and reduction | QCE Chemistry IA1 data test |
| Physics | Gravity and motion, and electromagnetism | QCE Physics IA1 data test |
| Psychology | Brain function, sensation and perception, memory, and learning | QCE Psychology IA1 data test |
Frequently asked questions
Which QCE subjects have a data test?
Biology, Chemistry, Physics and Psychology each run a data test as Internal Assessment 1, worth 10% of the subject result. This page links to one guide for each. Check the syllabus for any other science subject, because the assessment types are set per subject.
Is the data test a theory recall test?
No. The questions are about datasets you have not seen before, so the answers come from the data in front of you, and your Unit 3 knowledge is what lets you read it. QCAA's subject reports tell schools that questions on trends, patterns, limitations and uncertainty must relate to the evidence in the data provided, not to the methods of data collection or knowledge of the experimental method.
Does my school write the data test or does QCAA?
Your school writes it and you sit it at school. QCAA endorses the task as part of quality assurance (endorsement) and checks a sample of the school's marking (confirmation). Every school's test has to follow the same question specifications table in the syllabus.
How do I practise for a data test I cannot see in advance?
Practise reading unseen data under time. On AusGrader today that means the marked past-paper questions on each subject page, grouped by topic. The guide for your subject says which marks the test rewards.
Sources
- Biology 2025 v1.3 General Senior Syllabus, QCAA, January 2026, pp. 39-41. IA1 conditions, question specifications table and percentage cut-off marking guide.
- Chemistry 2025 v1.0 General Senior Syllabus, QCAA, January 2024, pp. 44-46. IA1 conditions, question specifications table and percentage cut-off marking guide.
- Physics 2025 v1.2 General Senior Syllabus, QCAA, October 2024, pp. 40-41. IA1 conditions, response lengths, provided resources and the percentage cut-off marking guide.
- Psychology 2025 v1.0 General Senior Syllabus, QCAA, January 2024, pp. 38-40. IA1 conditions, question specifications table and percentage cut-off marking guide.
- Biology subject report, 2025 cohort, QCAA, January 2026, p. 9. Limitation items based on evidence in the data, not the methodology.
- Biology subject report, 2023 cohort, QCAA, January 2024, p. 13. Marked IA1 excerpt crediting the conclusion, the supporting datum and the comparative reasoning.
- Chemistry subject report, 2023 cohort, QCAA, January 2024, pp. 10-13. Objective 3 questions must relate to the evidence in the data provided.
Syllabus and assessment material referenced in this guide is © State of Queensland (Queensland Curriculum and Assessment Authority), licensed under CC BY 4.0. See our QCAA licensing notice. AusGrader is an independent study tool and is not affiliated with, endorsed by, or operated by the QCAA.