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Litigation and Discovery

What Is Technology-Assisted Review?

Using machine learning to rank or classify documents for review in eDiscovery, so people review the most likely relevant documents first or not at all.

Legal Tech GlossaryBy The Circle Desk

Why It Matters

Courts in the US, UK, Ireland and elsewhere have accepted TAR for more than a decade. Generative AI review tools are now being added alongside it, and the same questions apply: how was it validated and how is quality measured.

Litigation & eDiscovery Companies

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Related Terms

CAL (continuous active learning)
A form of technology-assisted review, sometimes called TAR 2.0, in which the model keeps learning from every reviewer decision and continually re-ranks the remaining documents.
Predictive coding
An earlier name for technology-assisted review, where a model trained on attorney-coded samples predicts the relevance of the remaining documents.
Machine learning
Software that learns patterns from examples rather than following hand-written rules. It powered legal tech well before generative AI, for example in technology-assisted review.

General information, not legal advice. Part of the Legal Tech Glossary, 173 terms in plain English.