THE MAJOR PART OF THIS CONFERENCE REPORT DEVELOPS THE CONFERENCE THEME, "INDIVIDUAL DIFFERENCES IN FOREIGN LANGUAGE LEARNING," AS PRESENTED BY THE PRINCIPAL SPEAKER, JOHN B. CARROLL. HIS PAPER TREATS RATE OF LEARNING, SPECIALIZED TRAITS IN FOREIGN LANGUAGE APTITUDE (PHONETIC CODING ABILITY, GRAMMATICAL SENSITIVITY, ROTE LEARNING ABILITY, INDUCTIVE LANGUAGE LEARNING ABILITY, AND MOTIVATION), WAYS IN WHICH APTITUDE CAN BE MEASURED AND PREDICTED, AND WAYS IN WHICH APTITUDE TESTS CAN BE USED BY TEACHERS AS AIDS IN ADAPTING INSTRUCTION TO INDIVIDUAL DIFFERENCES. THE REPORT ALSO SUMMARIZES VIEWS PRESENTED BY A PANEL ON THE AVERAGE, SLOW, AND SUCCESSFUL LEARNERS AT THE ELEMENTARY, JUNIOR, AND SENIOR HIGH SCHOOL LEVELS OF THE FOREIGN LANGUAGE PROGRAM. (AM)