NEUR1020 Chap.1 Scientific Reasoning and Paradigms
Scientific Reasoning and Paradigms
Scientific psychology moves between observation, explanation and prediction. This chapter shows how a theory earns value by generating testable hypotheses and excluding some possible observations, why confirmation remains provisional, and how disconfirming data can motivate revision or rejection.
It then compares behaviourist, cognitive and biological paradigms as different choices about concepts, questions, methods and explanatory levels. The final section turns popular claims into explicit tests by defining the effect, identifying alternative explanations and stating the narrowest conclusion the evidence can support.
Throughout the chapter, evidence language remains calibrated: support is not proof, a failed prediction is not automatic rejection, and a technical measure is only as useful as its connection to the explanatory claim.
What this chapter covers
- 01
Observation, theory and hypothesis in a testing cycle
- 02
Testable predictions and falsifiability
- 03
Provisional confirmation and principled revision
- 04
Behaviourist, cognitive and biological paradigms
- 05
Alternative explanations and calibrated conclusions
Worked example · free
Comparing three explanations for faster detection
- +1A behaviourist account asks which environmental contingency or reinforcement history changed the response.
- +1A cognitive account proposes a change in attention, expectation or representation that transforms the input.
- +1A biological account asks which neural system changed its activity and how plasticity implemented the improvement.
Key terms
- Hypothesis
- A hypothesis is a testable prediction derived from an explanation.
- Theory
- A theory is an explanatory account that organises observations and generates predictions.
- Falsifiability
- Falsifiability means that some possible observation would count against an account.
- Paradigm
- A paradigm is a framework that shapes concepts, questions and methods within a discipline.
Scientific Reasoning and Paradigms FAQ
Why does confirmation not prove a theory?
A confirmed prediction shows that the result is compatible with the theory under the tested conditions. Other explanations may make the same prediction, and later observations may expose a boundary. Scientific confidence grows through repeated opportunities to fail, so acceptance remains provisional.
How do psychology paradigms differ?
Behaviourist approaches emphasise relations between environment and behaviour, cognitive approaches model internal representations and transformations, and biological approaches explain functions through neural or physiological mechanisms. They can compete over one phenomenon or contribute at different explanatory levels.
What makes a popular claim scientifically useful?
The claim must be made precise enough to test. Specify the effect, population, comparison and outcome, then identify evidence that would reduce confidence and alternative explanations that could create the same observation. A vague claim can absorb every result and therefore teaches little.
What is a testable prediction?
A testable prediction states an expected observation clearly enough that data can agree or disagree with it. It identifies the relevant condition and outcome rather than merely restating the theory in more concrete sounding language.
What should happen after disconfirming evidence?
Researchers should check the measurement and assumptions, consider whether a principled revision generates new predictions, and compare alternatives. An adjustment that accommodates every possible result removes the risk that made the original account informative.
Is a biological account always more scientific?
No. A biological measure can be vague or poorly connected to the claim, while a behavioural design can sharply distinguish competing explanations. Scientific quality depends on operational clarity, risky predictions and a valid inferential link.
How do alternative explanations improve an answer?
They show that one observation may have more than one cause and identify the comparison needed to decide between them. Naming a plausible rival also helps narrow the conclusion to what the present design actually rules out.
When should a theory be revised rather than rejected?
Revision is useful when it responds to a diagnosed assumption, preserves explanatory value and produces a new test that could fail. A change made only after seeing the result, with no new constraint, risks becoming an ad hoc rescue.
What does provisional acceptance mean?
It means the theory has survived the present test and remains useful while further hypotheses are examined. The conclusion stays open to future evidence, especially observations that distinguish it from alternative explanations making the same prediction.
Can paradigms complement one another?
Yes. A behavioural account may identify an environmental relation, a cognitive account the transformation linking input to response, and a biological account the mechanism implementing it. Compatibility depends on whether their predictions can coexist at different explanatory levels.
Exam move
Redraw the observation, theory and hypothesis cycle without notes, then place a fresh example on each arrow. For paradigm questions, use the same behaviour and force yourself to write one behavioural, cognitive and biological account with a distinct measurable variable. Finish by turning one familiar psychological claim into a falsifiable statement and listing the result that would challenge it.
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