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Frequently Asked Questions - ALL

How was ALL data collected?

ALL consists of two components:

  • Background questionnaires designed to collect general participant information.
  • Assessments of the skills of participants in Prose and Document Literacy, Numeracy, and Analytical Reasoning/Problem Solving. (The United States did not participate in Analytical Reasoning/Problem Solving.)

ALL is a household survey. Participants completed approximately 45 minutes of background questions and 60 minutes of assessment items in their homes. In the United States, a nationally representative sample of approximately 4,000 adults aged 16-65 was selected. Each participating country provided a sample which is representative of their adult population as a whole.

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