How does literacy apply to my target audience?
Various international organizations have performed a series of adult literacy surveys over the years. 1992 — NALS (National Adult Literacy Survey) 1994, 1996, 1998 IALS (International Adult Literacy Survey) 2003–2008 — ALLS (Adult Literacy and Life Skills Survey) 2011 PIAAC (Program for the International Assessment of Adult Competencies). Extra focus on digital and mixed formats.