IRIS offers public access to materials, data, and analysis tools for research on language learning, multilingualism, and language use.

iris-database.org
IRIS homepage screenshot

About IRIS

IRIS is a public collection of instruments, materials, stimuli, data, and data coding and analysis tools for language research. It covers first, second, and additional language learning, signed language learning, multilingualism, language education, language use, and language processing, and also holds postprints of journal articles and book chapters.

Materials are freely searchable and downloadable, and users can upload contributions that meet IRIS eligibility criteria. Search supports fields such as author, journal, research area, participant type, feature being learned, and language being learned; filters can narrow results, and multiple space-separated terms are treated as OR searches.

Key features

  • Search and download instruments, materials, stimuli, data, and coding/analysis tools
  • Upload new materials as contributions that meet eligibility criteria
  • Search by author, journal, research area, participant type, feature, or language
  • Filter search results to narrow down broad searches
  • Includes postprints of journal articles and book chapters
  • Covers first, second, signed language learning, multilingualism, language education, use, processing
Best for: Researchers, educators, and students in language learning, multilingualism, and language use who need searchable research materials, data, and analysis tools.
Good for
  • Free and public resource.
  • Materials are freely accessible and searchable.
  • Supports downloading materials and uploading eligible contributions.
Watch out for
  • Uploaded contributions must meet eligibility criteria.
  • Initial search may return everything in IRIS unless filters are used.

IRIS at a glance

Type
Website
Pricing
Not confirmed. Check the site
Platforms
Web
Open source
Not stated
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026

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IRIS FAQ

Is IRIS free to use?
Yes. The homepage states that IRIS is a free and public resource with freely accessible materials.
What kinds of materials are available?
IRIS holds instruments, materials, stimuli, data, data coding and analysis tools, and postprints of journal articles and book chapters.
How are multiple search terms handled?
Multiple terms separated by a space are automatically treated as term1 OR term2 OR ... searches.
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