index.qmd

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title: "Item Response Warehouse"
subtitle: "The Item Response Warehouse (IRW) is a collection of open, harmonized item response datasets."
description: |  
  * Open: The data are licensed for reformatting and public reuse. Their provenance is documented and code used to transform original data to meet the IRW data standard is available.
  
  * Harmonized: The data are formatted to a common standard. The goal of the IRW is to make large quantities of data available for standardized analysis given the common formatting. 
  
  * Item Response: The IRW is comprised of cross-classified item responses. The key element required of data for inclusion in the IRW is that the data need to report individual responses that are cross-classified by the focus of measurement (typically a person) and the measurement tool (typically an item).
  
  These datasets in IRW span a wide range of measures; examples include measures of ability in education settings, measures of partisanship based on voting records, and personality measures based on survey questions.  Responses can be scored in a variety of ways (dichotomous, polytomous, continuous) and may contain additional data (e.g., response time).

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  *NOTE:* The website may not reflect all data currently available in the IRW. To see the most recent set of available data resources, please look [here](https://redivis.com/datasets/as2e-cv7jb41fd).

## Metadata

Examine sample sizes and other dataset summary statistics.

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## Individual datasets

Explore each dataset's distribution of mean responses by item and subject.

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