Literacy

In its conventional sense, literacy includes reading and writing; some frameworks also include counting and basic numeracy. UNESCO describes literacy as a continuum of learning and proficiency across a person's life, involving the identification, understanding, interpretation, creation and communication of information. The OECD's Programme for the International Assessment of Adult Competencies (PIAAC) uses a more specific assessment definition: understanding, evaluating, using and engaging with written texts to participate in society and achieve goals. These formulations are related but serve different purposes, so literacy is not a single, context-free skill measured in only one way.

People develop literacy through education and practice, and continue to use and refine it in daily life, work and further learning. Reading instructions, comparing information, writing messages and interpreting documents all draw on literacy in different ways. As communication moves through digital media, people may also need to locate and evaluate information presented across multiple texts or sources. UNESCO therefore describes literacy as part of a broader and evolving set of skills that includes digital and media literacy, rather than as a one-time milestone at the beginning of schooling.

Literacy assessments define the tasks and proficiency they intend to measure. PIAAC, for example, assesses adults' ability to work with written texts and reports results across proficiency levels; its assessment tasks are designed around situations that may matter in everyday life. Population-level indicators can use skills surveys to estimate the share of people who reach a stated proficiency threshold. Such measures help compare skills, but results depend on the test framework, threshold and context. UNESCO's Institute for Statistics notes that functional literacy is context-related, so survey questions need to be meaningful across different social and economic settings.

Literacy supports participation in education, work and public life by helping people access and communicate information. UNESCO identifies links between literacy and capabilities such as labour-market participation, health and sustainable development. OECD analyses also find that adults with higher assessed literacy proficiency are more likely, on average, to be employed, earn higher wages and report several positive social outcomes. These are associations, not proof that literacy alone causes those outcomes; opportunities to learn and use literacy are shaped by social, economic and educational conditions as well.