The survey, a product of the OECD Programme for the International Assessment of Adult Competencies (PIAAC), focuses on skills - literacy, numeracy and problem solving - similar to those assessed in PISA, but the two studies use different assessment tasks, reflecting the different contexts in which 15-year-old students and older adults live. Respondents are also asked whether their skills and qualifications match their work requirements and whether they have autonomy over key aspects of their work. In Canada, data collection took place from November 2011 to June 2012, and France collected data from September to November 2012. The achieved samples ranged from a minimum of approximately 4 500 to a maximum of nearly 27 300.