A FIELD EXPERIMENT WAS CONDUCTED TO COMPARE THE EFFECTIVENESS OF THREE MODES OF INSTRUCTION IN THE USE OF THE AF 1807 OSCILLOSCOPE (TEKTRONIX 545A). SKILLED ELECTRONIC TECHNICIANS OF THE U.S. AIR FORCE SECURITY SERVICE SERVED AS SUBJECTS. ONE GROUP WAS TRAINED WITH AN AUDIOVISUAL INSTRUCTIONAL PROGRAM, AND A SECOND GROUP WITH A BOOK FORM OF THE SAME PROGRAM. THE PROGRAM COMBINED VERBAL INSTRUCTION AND RESPONSES WITH PRACTICE ON AN OSCILLOSCOPE. A THIRD GROUP WAS TRAINED IN THE TRADITIONAL MANNER IN A LABORATORY. ANALYSIS OF VARIANCE ON TEST SCORES INDICATED SUPERIORITY OF BOTH FORMS OF THE PROGRAM OVER THE CONVENTIONAL INSTRUCTIONS WITH NO DIFFERENCE IN EFFECTIVENESS BETWEEN PROGRAMS. ELECTRONIC APTITUDE, AS MEASURED BY THE AIRMAN QUALIFYING EXAMINATION (AQE), CORRELATED SIGNIFICANTLY WITH TEST SCORES FOR THE CONVENTIONALLY TRAINED GROUP AND FOR ALL SUBJECTS TOGETHER. (THE DOCUMENT INCLUDES FIVE TABLES AND FOUR FIGURES.) THIS DOCUMENT, AD-654-004, IS AVAILABLE FROM THE CLEARINGHOUSE FOR FEDERAL SCIENTIFIC AND TECHNICAL INFORMATION, SPRINGFIELD, VA. 22151. MICROFICHE $0.65, HARDCOPY $3.00. (AUTHOR/LY)