The Scientific Method

The scientific method is the systematic process researchers use to investigate questions, test ideas, and draw conclusions. Following it consistently keeps research logical and reproducible, which builds confidence in the conclusions it produces.

Key Takeaways

• The scientific method has eight steps: testable question, gather data resources, hypothesis, collect new data, analyze data, interpret data, publish findings, verify results.

• An unsupported hypothesis means revision, not failure — science is iterative.

• FINER (Feasible, Interesting, Novel, Ethical, Relevant) evaluates whether a research question is worth pursuing, independent of the scientific method's procedural steps.

• Reproducibility (step 8) is what ultimately builds confidence in a finding.

The Eight Steps of the Scientific Method

Consider a simple example throughout: a researcher notices plants seem to grow differently under different light colors and wants to investigate.

1. Generate a testable question. Curiosity about an observation becomes a clear, specific, measurable question — e.g., "Does the color of light affect plant growth?"

2. Gather data resources. Review existing literature (prior photosynthesis research) to see what's already known and find gaps, so the study builds on prior work instead of duplicating it.

3. Form a hypothesis. An educated guess, usually an "if-then" statement: "If plants are exposed to red light, then they will grow taller than plants exposed to blue light."

4. Collect new data. Design and run the experiment — grow identical plants under different light colors and measure height over time, holding other variables (water, nutrients) constant to isolate the light color's effect.

5. Analyze the data. Apply statistical methods (e.g., averages, significance tests) to determine whether results support or refute the hypothesis.

6. Interpret the data. Compare findings to the original hypothesis. An unsupported hypothesis isn't a failed experiment — it means the hypothesis needs revision or the experiment needs redesigning. Science is iterative, and unexpected results often lead to new insights.

7. Publish the findings. Sharing results with the scientific community ensures transparency and lets other researchers review methods and build on the work.

8. Verify the results. Reproducibility is a cornerstone of science — if other scientists repeat the experiment and get similar results, confidence in the conclusions grows.

The FINER Method for Evaluating Research Questions

Alongside the scientific method, researchers use the FINER method to judge whether a research question is meaningful and practical to pursue. The framework comes from Stephen Hulley and colleagues' Designing Clinical Research and is now used well beyond clinical research as a general question-quality checklist.

FINER criteria

Letter	Criterion	Meaning
F	Feasible	Can the study realistically be done with available resources, time, and technology?
I	Interesting	Does the question engage the scientific community, encouraging collaboration and further investigation?
N	Novel	Does it address something new or offer a unique perspective?
E	Ethical	Does it meet ethical standards — informed consent, minimizing harm, respecting participants' rights?
R	Relevant	Does it have practical implications or contribute to broader scientific understanding?

Applied to the plant example: studying plant growth on Mars would fail feasibility (no access to space travel); studying red light's effect on root development specifically, if unexamined before, would be novel; and the question could be relevant if it informs agricultural or indoor-farming practice.

Combining the scientific method's systematic steps with FINER's evaluative framework ensures research is both well-structured and impactful.

Common MCAT Mistakes

• Treating an unsupported hypothesis as a "failed" experiment. A hypothesis that isn't supported by the data is still a valid result — it means the hypothesis needs revision or the experiment needs redesigning, not that the process failed.

• Confusing the scientific method's steps with the FINER criteria. The eight steps describe how to carry out an investigation; FINER evaluates whether a research question is worth pursuing in the first place. They answer different questions.

• Skipping the literature review step. Jumping straight from an observation to an experiment without gathering existing data resources risks duplicating prior work or missing a known confound.

• Forgetting that verification requires independent reproduction. A single research team getting consistent results on repeat trials isn't the same as other scientists reproducing the findings — step 8 specifically depends on outside replication.

MCAT-Style Concept Check

Question: A researcher runs an experiment and finds that the data do not support the original hypothesis. According to the scientific method, what should the researcher do next?

• A) Discard the experiment, since a failed hypothesis means the research question was invalid

• B) Publish the results only if a follow-up experiment supports the hypothesis

• C) Revise the hypothesis or redesign the experiment, since science is an iterative process

• D) Repeat the identical experiment until the data happen to support the hypothesis

Answer: C

Explanation: The scientific method treats an unsupported hypothesis as informative, not as a failure. Per the interpret-the-data step, the appropriate response is to revise the hypothesis or redesign the experiment based on what the data actually showed — reflecting the iterative nature of science. Discarding the work (A) misreads what an unsupported hypothesis means; withholding publication (B) contradicts the transparency goal of the publish step; and repeating the same experiment hoping for a different result (D) isn't how the interpret/revise step works.

FAQ

How many steps are in the scientific method?

Eight: generate a testable question, gather data resources, form a hypothesis, collect new data, analyze the data, interpret the data, publish the findings, and verify the results.

What does it mean if my hypothesis isn't supported by the data?

It doesn't mean the experiment failed. It means the hypothesis needs revision, or the experiment needs redesigning — science is iterative, and unexpected results often lead to new insights.

What is the FINER method used for?

FINER (Feasible, Interesting, Novel, Ethical, Relevant) is a checklist for evaluating whether a research question is meaningful and practical to pursue, separate from the procedural steps of the scientific method itself.

Why does the scientific method include a "verify the results" step?

Reproducibility is a cornerstone of science. If other scientists repeat the experiment independently and get similar results, confidence in the original conclusions grows.