The student-designed investigation, logbook and scientific poster (Unit 4 Outcome 3): VCE Psychology
“Authentication of generated primary data using a logbook; conventions of science communication: scientific terminology and representations, symbols, formulas, standard abbreviations and units of measurement; conventions of scientific poster presentation, including succinct communication of the selected scientific investigation and acknowledgements and references; the key findings and implications of the selected scientific investigation”
Unit 4 Outcome 3 is a student-designed investigation that generates primary quantitative data on mental processes or psychological functioning, presented as a scientific poster of no more than 600 words (tables, graphs, captions and references not counted) and supported by a dated logbook that authenticates the data and records planning, risks, raw data, preliminary analysis and the treatment of outliers. The poster has a title (the question), introduction (aim, hypothesis, background), methodology and methods, results, a central one-sentence communication statement of the key finding (20 to 25 per cent of the space), discussion (interpretation, support for the hypothesis, links to concepts and research, limitations and improvements, implications), conclusion (a direct answer with no new information) and references. Use precise terminology, standard units and conventions, and write succinctly.
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What this dot point is asking
Unit 4 Outcome 3 is a School-Assessed Coursework task worth 40 of the 120 Unit 4 marks. You design and conduct a scientific investigation that generates primary quantitative data relating to mental processes and psychological functioning, then present it as a scientific poster supported by your logbook. The investigation can be carried out in Unit 3, in Unit 4 or across both, but it is assessed in Unit 4.
The Area of Study 3 key knowledge has three strands. Investigation design and scientific evidence are covered on our research methods and data analysis pages. This page covers the third strand, science communication, plus the logbook and how the poster is put together.
The answer
The investigation
The study design requires you to:
- develop a research question, state an aim and formulate a hypothesis;
- plan an appropriate methodology and method, complying with safety and ethical guidelines;
- generate primary quantitative data (you collect it yourself, and it is numerical);
- analyse and evaluate the data, identify limitations of the data and methods, link results to psychological concepts, discuss implications, and draw a conclusion.
Choose a question you can answer with a simple, well-controlled design and a measurable DV (for example, words recalled, reaction time in milliseconds, or a score on a stress rating scale). The investigation must draw on the knowledge and key science skills of Units 3 and 4, such as sleep, stress, learning or memory. Plan for ethics from the start: informed consent (with a parent or guardian for participants under 18), voluntary participation, withdrawal rights, confidentiality and debriefing.
The logbook
You must keep a logbook of practical work, with every entry dated. For this investigation it records all elements of your planning: identification and management of relevant risks, raw data, and preliminary analysis and evaluation, including identification of outliers and how you treated them. The logbook authenticates your primary data and is assessed together with the poster. The study design recommends a hard-copy logbook for assessment tasks to avoid falsification or alteration of results.
The poster format
The poster should not exceed 600 words. Supporting text such as tables, graphs, image captions, references and acknowledgements is not counted. The study design sets these sections:
| Section | What it must contain |
|---|---|
| Title | The question under investigation (plus student name) |
| Introduction | A brief reason for the investigation, a clear aim, a hypothesis and/or prediction, and relevant background psychological concepts |
| Methodology and methods | A brief outline of the methodology; a summary of the data generation and data analysis methods |
| Results | Generated data presented in an appropriate format (tables, graphs) to show trends, patterns or relationships |
| Communication statement | In the centre, occupying 20 to 25 per cent of the poster: a one-sentence summary of the major finding that answers the investigation question |
| Discussion | Interpretation and evaluation of the data; limitations with suggested improvements; cross-referencing to psychological concepts and previous research; whether the findings support the hypothesis; implications and further investigations |
| Conclusion | A response to the investigation question and the extent to which it has been answered, with no new information |
| References and acknowledgements | All quotations and sourced content referenced and acknowledged |
Science communication conventions
- Use precise psychological terminology (for example, "confounding variable", "within-subjects design", "long-term potentiation") rather than everyday words.
- Present data with standard units and abbreviations (ms, %, for sample size), labelled axes and informative titles. The IV goes on the x-axis.
- Write succinctly: the poster is meant to be read quickly by both technical and non-technical audiences, so every sentence should earn its place in the 600 words.
- Acknowledge sources using a standard referencing convention.
Writing a discussion that scores
A strong discussion moves through a clear sequence:
- Interpret the main result, with numbers (for example, the difference in means and the direction).
- Link it to the hypothesis: does the evidence support or refute it?
- Explain it using relevant psychological concepts and previous research.
- Evaluate: identify limitations (sample size and representativeness, extraneous or confounding variables, errors, uncertainty, outliers) and suggest a specific improvement for each.
- Implications: what the finding might mean in practice, and what further investigation would test it.
The investigation
Question: "Does a 10-minute mindfulness session reduce self-reported stress in Year 12 students before a test?" A mixed design: 24 students, randomly allocated to mindfulness or quiet reading, rating stress (0 to 10) before and after.
Step 1: the communication statement
"Year 12 students who completed a 10-minute mindfulness session reported a larger drop in pre-test stress than students who read quietly." This answers the question in one sentence and names both conditions and the DV.
Step 2: the results
One table of mean stress ratings (before, after, change) for each group, and one bar graph of the mean change in each group, with the IV (condition) on the x-axis and mean change in stress rating on the y-axis.
Step 3: the discussion
Interpret the difference in mean change; state that it supports the hypothesis; explain it using the attention and acceptance components of mindfulness; note limitations (small sample of 12 per group, subjective self-report ratings, a single school) with improvements (a larger stratified sample, adding a physiological measure); give an implication (a brief pre-test routine) and a further investigation.
Step 4: the conclusion
"In this sample, a 10-minute mindfulness session was associated with a larger reduction in self-reported pre-test stress than quiet reading, although the small sample limits how far this can be generalised." No new information is added.
Marker's note: the communication statement and the conclusion should agree. Keep the discussion evaluative, not just descriptive.
- Going over 600 words
- Tables, graphs, captions and references do not count, so move detail into well-captioned figures.
- Writing a vague communication statement
- "Music affects memory" does not report the finding; state the direction and the variables.
- Introducing new information in the conclusion
- The conclusion answers the question and states how well it has been answered; new limitations or results belong in the discussion.
- Treating the logbook as optional
- It authenticates your data and is assessed with the poster; record outliers and how you handled them.
- Saying the results "prove" the hypothesis
- Evidence supports or refutes a hypothesis.
Practice questions
Original practice questions graded from foundation to exam level, each with a full worked solution. Try them before revealing the solution.
foundation2 marksState two things that must be recorded in the logbook during a student-designed investigation, and explain why the logbook matters.Show worked solution →
1 mark any two of: planning (aim, hypothesis, method), identification and management of risks, raw data, preliminary analysis and evaluation, identification of outliers and how they were treated, all dated; 1 mark the logbook authenticates the primary data and the student's own work, and is assessed alongside the poster.
core2 marksA student's poster investigated whether listening to music affects recall of a word list. Write a suitable one-sentence communication statement for the centre of the poster, given that the music group recalled on average 4 fewer words than the silence group.Show worked solution →
1 mark a single sentence that answers the investigation question; 1 mark it states the direction of the finding and refers to the variables specifically.
Sample answer: "Students who studied a word list while listening to music recalled fewer words than students who studied in silence."
core3 marksDistinguish between the discussion and the conclusion sections of a VCE Psychology scientific poster.Show worked solution →
1 mark discussion interprets and evaluates the data (trends, whether they support the hypothesis, links to psychological concepts and previous research); 1 mark discussion also identifies limitations with improvements, and implications or further investigations; 1 mark the conclusion gives a direct response to the investigation question and the extent to which it has been answered, with no new information.
exam4 marksA student's poster concludes: 'This proves that caffeine improves memory in all teenagers.' The investigation tested 10 friends, each completing a memory test after water and then after coffee on the same afternoon. Evaluate this conclusion and rewrite it so it is consistent with the evidence.Show worked solution →
Marks: 1 "proves" overstates what a single small study can show (evidence supports or does not support a hypothesis); 1 the sample of 10 friends is small and not representative, so the finding cannot be generalised to all teenagers (low external validity); 1 order effects in the within-subjects design (practice on the first test) are an alternative explanation, reducing internal validity; 1 a rewritten conclusion, such as: "In this sample, memory scores were higher after coffee than after water, which supports the hypothesis, but practice effects and the small sample limit this conclusion."