Duolingo Experimentation — Map of Content

Duolingo runs hundreds of experiments per week and treats the result as the decision, not as one input. The handbook calls this Show Don't Tell: when people disagree, the experiment is the answer, not the more senior person's intuition. This skill packages that protocol.

This skill is structured as a graph: scan the descriptions below, follow only the [[wikilinks]] you need.

The protocol

• [[references/show-dont-tell]] — the principle: metrics decide, not titles.
• [[references/hypothesis-design]] — what makes a testable hypothesis vs. a wish.
• [[references/ab-test-structure]] — variant/control, randomization unit, exposure rules.
• [[references/ladder-of-evidence]] — four methods with four blind spots: interviews, controlled experiments, A/B tests, outcome studies.

Metrics