IRS13 Test Environment chapter E. M. Keen Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. 1-49 References (contd.) (11] C. Cleverdon, The Cranfield Tests on Index Language Devices, Aslib Proceedings, Vol. 19, No. 6, June 1967. (12] C. Cleverdon and M. Keen, Factors Determining the Performance of Indexing Systems, Vol. 2, Test Results, Aslib Cranfield Research Project, Cranfield, l9[OCRerr]6. [13] J. 0'Connor1 Relevance Disagreements and Unclear Request Forms, American Documentation, Vol. 18, No. 3, July 1967. [14] C. A. Cuadra, et al., Experimental Studies of Relevance Judgments: Final Report, Vol. 1, Project Summary, TM - 35201001100, Vol. 2, Description of Individual Studies, TM - 35201002100, System Development Corporation, June 1967. (15] G. Salton, The Evaluation of Automatic Retrieval Procedures - Selected Test Results Using the SMART System, American Documentation, Vol. 16, No. 3, July 1965 (Also ISR-8, Section IV). (16] C. W. Cleverdon, The Testing and Evaluation of the Operating Efficiency of the Intellectual Stages of Infor- mation Retrieval Systems, Proceedings of the International Study Conference on Classification Research, Elsinore, 1964.