This annotated bibliography dealing with adult learning characteristics contains 82 indexed and abstracted entries arranged under the following headings: (1) Mental and Perceptual Abilities, (2) Personality and Social Role Factors, and (3) General Bibliographies. Intelligence, intelligence tests, memory and retention, adult development, older adults, disadvantaged groups and others are covered in these abstracts, most of which are dated from 1966-68. (author)