THIS STUDY, CONDUCTED BY THE MODERN LANGUAGE ASSOCIATION (MLA) WITH THE ASSISTANCE OF THE EDUCATIONAL TESTING SERVICE, WAS DESIGNED TO DETERMINE WHETHER THE FRENCH, GERMAN, AND SPANISH SKILL TESTS OF THE MLA COOPERATIVE FOREIGN LANGUAGE TESTS AND THE MLA PROFICIENCY TESTS FOR TEACHERS AND ADVANCED STUDENTS MEASURE ALONG A CONTINUUM OR WHETHER THERE IS A SERIOUS GAP BETWEEN THE TWO SETS OF TESTS. THE RESULTS OF THE STUDY, SUMMARIZED IN A SERIES OF 44 GRAPHS AND TABLES COMPRISING THE BULK OF THE DOCUMENT, SHOW THAT THE TWO SETS OF TESTS DO MEASURE ALONG A CONTINUUM AND THAT THERE IS NO NEED FOR A TEST OF INTERMEDIATE DIFFICULTY. THE OVERLAP IS NOT SO GREAT, HOWEVER, AS TO PREVENT THE COMBINED SETS OF TESTS FROM MEASURING STUDENTS AT ALL LEVELS OF ACHIEVEMENT. BRIEF BUT INCLUSIVE DISCUSSIONS OF TEST ADMINISTRATION AT THE UNIVERSITY OF ILLINOIS AND HOFSTRA UNIVERSITY AND OF STUDY DESIGN AND RESULTS ARE INCLUDED. (ST)