PISA and PIAAC study methodology: some achievement and many errors


PIIACPISA and PIAAC reports compiled by the OECD (Organisation for Economic Cooperation and Development) on over half a million 15 year-olds in seventy-five countries (PISA) and 125,000 people between 16 and 65 years of age in 25 countries (PIAAC) became a topic of great interest to the media and a major influence on current education policies.
They are supposedly focused on calculating the capacity of 15 year-olds and adults between 16 and 65 to use their skills and know-how to face the challenges of everyday life. This is obviously complicated as it is difficult to achieve through a mere academic test. The purpose of this article is to provide details of the assessment of some achievements and errors thought to be contained in the study, some of which take place in Spain.