CRANV2 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. - 64 - Starting Term Groups 213 4 5 6 7 8 9 10 11 12/15 Seven Proportional Coordination Levels 1/7 2/7 3/7 4/7 5/7 6]7 7/7 1 1 2 2 2 3 3 1 1 2 3 3 4 4 1 2 2 3 4 4 5 1 2 3 4 4 5 6 1 2 3 4 5 6 7 1 2 3 5 6 7 8 1 2 4 5 6 8 9 1 3 4 6 7 8 10 2 3 5 6 7 9 i0 2 3 5 7 8 10 11 FIGURE 3,26T PROPORTIONAL PLACEMENT OF COORDINATION LEVELS IN STARTING TERM GROUPS FOR METHOD 2 Such a method is very .arbitrary; some of the results for questions having less than seven starting terms had to be used more than once, whilst some of the results for questions having more than seven starting terms could not be used, The performance figures resulting from this method are given in Fig. 3.27TP. For Method 3, described as I maximum starting term coordination levels[OCRerr] the questions were totalled by grouping according to the maximum number of starting terms. Thus the three-starting-term questions searched at a level of 3 would be totalled with the four-starting-term questions searched at 4, with the five-starting-term questions searched at 5 and so on. A Single coordination level is dropped.off at a time, working from right to left in the diagram_ given in Table 3.28T. It can be seen that questions having only a small number of starting terms are soon reduced to a single term search; therefore the results at this level are maintained together with those questions that still have terms that can be dropped off, until all questions are being searched on a single term. Results by this method are given in Fig. 3.29TP.