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Vocabulary

Understand the term. Connect the concept.

A practical dictionary of 512 AI, machine learning, mathematics, and programming terms from HerbDev’s AI Vocabulary app. Start with a definition, explore an example, then follow the concepts behind it.

Linked concepts open in a new tab. Audio reads the definition and example.

Test Set

Data & Datasets · Level 2 of 5

Test Set

Examples reserved for final evaluation after development choices are fixed.

Using it for tuning compromises its role as an independent check.

Example

A locked dataset is evaluated once after model selection.

Listen to the definition and example

Audio transcript

Test Set. Examples reserved for final evaluation after development choices are fixed. Using it for tuning compromises its role as an independent check. For example: A locked dataset is evaluated once after model selection.

Explore this concept

A useful analogy

A sealed final exam opened after the study strategy is settled.

Why it matters

This helps you prevent misleading experiments caused by data preparation and split mistakes.

Technical detail

Evaluate the chosen method once under a prespecified protocol; report uncertainty and relevant subgroup performance.

Common misconception

Repeatedly choosing improvements based on test scores turns the test into development data.

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Related concepts

Quick recall question

Try answering before looking back at the definition.

Put the terminology into context: How AI works · Machine-native representations · All learning paths

Manage browser learning data

“Remove my test data” clears all AI 101 and ML 101 scores, reviews, project checklists and rating selections, plus saved vocabulary and recent history in this browser. Test entries cannot be separated from other learning progress. Cookie preferences, security protections, submitted feedback, contact emails and past analytics are kept.