CRANV2 Aslib Cranfield Research Project: Factors Determining the Performance of Indexing Systems: Volume 2 Methods for presentation of results chapter Cyril Cleverdon Michael Keen Cranfield An investigation supported by a grant to Aslib by the National Science Foundation. Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. - 77 - experimenters may well find that different measures better suit their purpose; hopefully, in this survey the relationship between different measures has now been established, and so ]ong as complete sets of figures are given in reporting test results, there should be no serious difficu]ty in converting from one set of measures to another. Ultimately, one assumes that something approaching general agreement will be reached on the measures to be used. All that we would claim is that the measures used in this report appear to be as good as any others so far proposed.