Critical thinking in Extended Investigation requires familiarity with a set of core modes of thinking — the mental operations used to process, evaluate and produce knowledge. Knowing these terms precisely allows you to both apply them in your own research and identify them in the work of others.
| Mode | Definition | Example in Research |
|---|---|---|
| Analysis | Breaking down a whole into its component parts to understand structure and relationships | Identifying the separate claims within a research article |
| Inference | Drawing a conclusion that goes beyond the explicit information provided | Concluding that a trend will continue based on observed data |
| Categorisation | Grouping items according to shared characteristics | Sorting sources as primary vs secondary |
| Generalisation | Forming a broad conclusion from a set of specific instances | Concluding that a finding applies to a wider population |
| Evaluation | Making a judgement about quality, validity or worth using criteria | Deciding whether a methodology is appropriate for a question |
Argumentation is the structured process of presenting claims supported by reasons and evidence. It is central to academic research — both in reading others’ work and in presenting your own findings.
Inductive reasoning moves from specific observations to general conclusions. It generates hypotheses and theories. Most empirical research is inductive in nature — you collect data and look for patterns.
Deductive reasoning moves from a general principle to a specific conclusion. If the premises are true and the reasoning valid, the conclusion must be true. Deductive arguments are used to test whether real-world data aligns with theoretical predictions.
KEY TAKEAWAY: These five modes — analysis, inference, categorisation, generalisation and evaluation — are the building blocks of all academic thinking. You need to be able to name them, define them, and demonstrate them in your own work and in your critique of others’.
Two additional modes appear in Unit 4:
EXAM TIP: VCAA examiners frequently ask students to identify the mode of thinking being used in a passage or to explain the difference between two modes (e.g., inference vs evaluation). Practice labelling specific sentences with these terms.
Your Extended Investigation is assessed partly on the quality of your reasoning. Using the correct terminology — writing that you “evaluated the methodology” rather than just “looked at how the study was done” — signals to assessors that you understand the thinking process itself, not just the content.
COMMON MISTAKE: Confusing generalisation with inference. Generalisation always involves extending a conclusion from a sample to a larger population. Inference is broader — any conclusion drawn that goes beyond what is explicitly stated. All generalisations are inferences, but not all inferences are generalisations.
