Welcome to the Finish Line!

You’ve braved the wind to measure river speed, asked dozens of people to fill out questionnaires, and spent hours turning your tally charts into beautiful graphs. But a geographical investigation isn't just about collecting data—it’s about what that data proves. In this chapter, we look at the final stages of the Route to Geographical Enquiry: making sense of your results and being honest about how well the investigation actually went.

Think of yourself as a detective. You’ve gathered the clues (data) and organized them (presentation). Now, you need to deliver your final report to the court. Let’s dive in!

1. Drawing Conclusions

The conclusion is where you answer your original hypothesis. You need to state clearly whether your data shows that your hypothesis was correct, incorrect, or only partially true.

How to Write a Professional Conclusion

Don't worry if this seems tricky at first! Just follow these three steps:

  1. State your verdict: Start by saying "The data collected supports the hypothesis that..." or "The results reject the hypothesis that..."
  2. Use "Evidence-Based" justification: You must justify your conclusion. This means picking out specific numbers, patterns, or anomalies from your data to prove your point.
  3. Address the "Partial" truth: Often in geography, things aren't black and white. It is perfectly okay to say a hypothesis is partially true (e.g., it worked at Site 1 and 2, but not at Site 3).

Quick Tip: If your hypothesis was \( \text{River velocity increases downstream} \), don't just say "it did." Say "The hypothesis was supported as velocity increased from \( 0.2 \text{m/s} \) at Site 1 to \( 0.8 \text{m/s} \) at Site 4."

Key Takeaway:

Justification is everything. A conclusion without data is just an opinion!

2. Evaluation: Judging Your Work

The syllabus defines Evaluate as "judging or calculating quality, importance, or value." In fieldwork, this means looking back at your methods and asking, "Can I really trust these results?"

Reliability and Validity

When you evaluate, you are checking two things:

  • Reliability: If someone else did the same test, would they get the same result?
  • Validity: Did your method actually measure what you intended to measure?

Did you know? Even professional geographers have "bad days" in the field. Admitting that your data might be slightly off isn't failing—it’s actually a sign of a high-level student!

3. Identifying Limitations

A limitation is a weakness or a problem that occurred during your investigation. These usually fall into three categories:

A. Equipment Errors

Sometimes the tools let us down. Example: A flow meter might get stuck in weeds, or a tape measure might sag in the wind, leading to an inaccurate measurement of \( \text{river width} \).

B. Sampling Issues

Did you collect enough data? If you only interviewed \( 5 \) people for a questionnaire, your sample size is too small to represent the whole town. This is a major limitation.

C. External Factors (The "Human/Nature" Problem)

Geography happens in the real world, and the real world is messy!
Example: If you did a traffic count during a school holiday, the data won't represent "normal" traffic.
Example: If it rained heavily the day before your river study, the \( \text{discharge} \) will be higher than usual.

Common Mistakes to Avoid:
  • Being too vague: Don't just say "the weather was bad." Say "Heavy rain made the river turbid, making it difficult to see the river bed for the roundness index."
  • Blaming yourself: Instead of saying "I forgot to count," say "Human error in tallying during peak periods may have led to an undercount."

4. Suggestions for Further Work

This is the "What's next?" section. If you had more time, money, or better equipment, how would you make the study better?

How to suggest improvements:

  • Increase the Sample Size: "In the future, I would conduct \( 50 \) questionnaires instead of \( 10 \) to get a more representative result."
  • Change the Timing: "I would repeat the study on different days of the week (e.g., a weekend vs. a weekday) to compare results."
  • Add more Sites: "Adding three more sites further downstream would help to confirm the trends seen in the Bradshaw Model."
  • Use Better Tech: "Using a digital flow meter instead of the 'orange peel and stopwatch' method would provide more precise velocity data."
Key Takeaway:

Every limitation you identify should have a matching improvement or suggestion for further work.

Quick Review: The AO3 Checklist

Assessment Objective 3 (AO3) is all about Conclusion and Evaluation. When answering exam questions on this, check if you have:

  • Reached a clear verdict on the hypothesis?
  • Used data (numbers) to support your points?
  • Identified at least two limitations (e.g., sample size, timing, equipment)?
  • Suggested a realistic improvement for each limitation?

Don't worry if this seems tricky at first! Evaluating your own work feels strange, but in the IGCSE exam, being critical of your methods is the best way to show you are a true geographer. Good luck!