THESE EXPERIMENTS WITH VERBAL BEHAVIOR WERE CARRIED OUT AS AN EXTENSION AND ADAPTATION OF GENERAL LABORATORY PRINCIPLES DEVELOPED WITH ANIMALS. THE EXPERIMENTS COVERED THREE AREAS. THE FIRST WAS AN APPLICATION OF GENERAL PRINCIPLES OF VERBAL BEHAVIOR, LARGELY BASED ON SKINNER'S ANALYSIS, TO THE PROBLEMS OF TEACHING A SECOND LANGUAGE. ACTUAL TEACHING PROGRAMS WERE DEVELOPED IN GERMAN AND VIETNAMESE. THE SECOND AREA OF RESEARCH WAS A PROGRAM OF EXPERIMENTS DESIGNED TO TEST THE HYPOTHESIS THAT TRAINING AS A LISTENER AND A READER WOULD ENHANCE THE DEVELOPMENT OF SPEAKING AND WRITING. THE EXPERIMENTS WERE CARRIED OUT, USING A SINGLE VIETNAMESE PHONEME, TO TRACE THE INFLUENCE ON PRONUNCIATION OF THE SUBJECT'S SKILL AS A LISTENER. A THIRD AREA OF EXPERIMENTS CONCERNED MOTIVATIONAL VARIABLES. THE AUTOMATIC PROGRAMING OF THE TEACHING MACHINE MATERIALS MADE IT POSSIBLE TO MANIPULATE MANY OF THE RELEVANT REINFORCERS. THE EXPERIMENTS DEALT MAINLY WITH THE ASPECT OF THE TEACHING MACHINE PERFORMANCES THAT WERE REINFORCED. THIS DOCUMENT IS ALSO AVAILABLE FROM THE CLEARINGHOUSE FOR FEDERAL AND SCIENTIFIC AND TECHNICAL INFORMATION, SPRINGFIELD, VIRGINIA 22151, AND FOR QUALIFIED INVESTIGATORS, FROM DDC, CAMERON STATION, ALEXANDRIA, VIRGINIA 22314. (RS)