This final report presents a description of a test combining cloze procedure and an entropy analysis (CLOZENTROPY), designed to measure the compatibility of a foreign student's English with that of his peers who are native speakers of English. This test, and the Test of English as a Foreign Language (TOEFL) were administered to 48 foreign students at the University of Colorado. (The CLOZENTROPY test was also administered to 200 native speakers of English at the same university.) Comparable reliability coefficients of approximately .86 were obtained for the two tests. Correlation between total scores on the two tests was .833. Analysis of variance confirms that content and difficulty of test material, major of subjects, and level and major of native comparison groups have significant influences on the CLOZENTROPY index of English proficiency. A discussion of the advantages over convention al types of tests and the major weakness (dependency on computer assistance in scoring), a sample copy of the test instrument, sample letters to the students, samples of computer output on the scoring program, and other data are included in the report. (AMM)