“…The CLIENT 1 program has as a general background several diverse, but nevertheless related, lines of research: (a) guidance information retrieval programs (e.g., Tiedeman, Davis, Durstine, Ellis, Fletcher, Landy, & O'Hara, 1970), (b) question-answering natural language programs (e.g., Winograd,197 l), (c) personality model simulations that are not interactive (e.g., Loehlin, 1968;Tompkins, & Messick, 1963), (d) programs using computational linguistics to simulate therapeutic interviewing (e.g., Weizenbaum, 1966), (e) simulations of human problemsolving (e.g., Newel1 & Simon, 1972), and (0 interview simulations using interactive personality models (e.g., Bellman, Friend, & Kurland, 1966;Colby, Weber, & Hilf, 1971;Starkweather, Kamp, & Monto, 1967. ) These various lines of research differ among themselves and with CLIENT 1 with respect to their natural language handling capability, the extent to which they are interactive, and their inclusion of personality models and problem-solving features.…”