Committee on Performance Levels for Adult Literacy, Robert M. Hauser, Christopher F. Edley Jr., Judith Anderson Koenig, and Stuart W. Elliott ; Hauser, Robert Mason ; National Research Council (U.S), Committee on Performance Levels for Adult Literacy Staff ; Christopher F. Edley, Jr ; Judith Anderson Koenig ; Robert M. Hauser ; Stuart W. Elliott ; Board on Testing and Assessment ; Center for Education ; Committee on Performance Levels for Adult Literacy ; Division of Behavioral and Social Sciences and Education ; Edley, Christopher F. ; Elliott, Stuart W. ; Hauser, Robert M. ; Koenig, Judith Anderson ; National Research Council (U.S.)