Research & Validation · Field Guide

Research Tactics

Not all evidence is created equal — some methods tell you what people say, a few catch what they actually do, and the best are hard to fake at any price. Here are two dozen ways to learn from the people you're designing for, seen through two lenses: the 2×2 sorts them by the kind of question each answers; the effort-vs-believability map shows what each one costs against what its evidence is worth. Flip between the graphs — your selection stays put, and the detail below reads it from both angles.

Sorted by the kind of question each method answers — qualitative vs. quantitative, and what people say vs. what they do.

Attitudinalwhat people say

Behavioralwhat people do

Qualitativewhy & how to fix

Quantitativehow many

Usability Test

QualitativeBehavioral

EffortHighBelievability

LowHigh

What it is: Watch representative users attempt real tasks to find where the product helps and where it gets in the way.
How it works: Set concrete tasks, observe, and note success, errors, and friction — moderated in a session or run unmoderated.
Best for: diagnosing task-level problems in a design.
How believable it is: Good. You watch real people attempt real tasks, so you see genuine behavior and friction — the workhorse of trustworthy design evidence, short of shipping.

Positions are an experienced rule of thumb, not exact measurements — effort and believability shift with how a study is run. Use it to reason about trade-offs, not to settle an argument.