Lesson 70 · The Grant Architect

70. Quantitative Methods

30 min

By the end you'll be able to

  • Identify the three workhorse quantitative tools used in grant evaluation.
  • Explain why validated instruments produce more credible findings than custom surveys.
  • Distinguish process indicators from outcome indicators.
  • Recognize when administrative data can replace a new survey.

Quantitative methods give your evaluation the structure that reviewers, statisticians, and program officers can compare across sites and years. In this lesson you learn the three workhorse tools (surveys, pre and post tests, and administrative data) and how to pick the right one for the question you are actually trying to answer.

You will see why validated instruments matter. A homegrown survey may feel responsive to your program, but it produces numbers that no one outside your organization can interpret with confidence. Validated scales (such as the Financial Capability Scale, PHQ-9, or sector-specific tools) come with established reliability, comparison populations, and a paper trail that protects your findings during review. You will also learn when administrative data already collected by schools, clinics, or agencies can answer your question without burdening participants with one more survey.

By the end you should be able to choose between a validated instrument and a custom tool with a clear reason, describe the difference between a process indicator (sessions delivered) and an outcome indicator (behavior change), and name at least one administrative data source relevant to the population you serve. Strong quantitative design is what separates an evaluation reviewers respect from one they quietly discount.

Common mistakes

These are the traps learners hit most often on this topic. Knowing them in advance is half the fix.

  • Writing custom surveys when a validated tool already exists.

    Custom instruments feel responsive to the program but produce findings that reviewers cannot interpret and cannot compare across studies.

  • Measuring outputs and labeling them outcomes.

    Reporting sessions delivered as evidence of effectiveness confuses what the program did with what changed for participants, and reviewers will catch the slip.

Practice problems

Try each on paper first. Click Show solution only after you've made a real attempt.

  1. Problem 1
    Choose between a validated scale and a custom survey for measuring depression symptoms in a community health program. Justify the choice.
    Show solution

    Use the PHQ-9, a nine-item validated depression screen with established reliability, established cutoff scores, and a comparison literature that lets reviewers interpret the findings. A custom depression survey would produce numbers no external reader could anchor, and it would foreclose comparison to other community health programs.

Practice quiz

  1. Question 1
    Which of the following is a validated instrument rather than a homegrown survey?
  2. Question 2
    Which of the following best describes a process indicator?
  3. Reflection 3
    In two sentences, explain when administrative data should replace a new survey.

Lesson 70 recap

Quantitative methods produce credible evidence when they rely on validated instruments and clearly separate process from outcome.

Coming next: Lesson 71 — Qualitative Methods

Next, we balance the numbers with qualitative methods, the tools that answer why and how rather than how many.

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