A project is described that attempted to formulate a meaningful concept of adult performance levels, to devise instruments to measure performance at those levels, and to use those instruments to assess the functional competence of a representative sample of the population of the United States. Three levels of competence are defined in terms of…

The Adult Performance Level (APL) project summary specifies the competencies which are functional to economic and educational success in society and describes devices developed for assessing those competencies. The APL theory of functional competency identifies adult needs in general knowledge areas (consumer economics, occupational knowledge,…