MONO91 Other Potentially Related Research chapter Mary Elizabeth Stevens National Bureau of Standards documents relevant to a request even though the documents had not been indexed by the terms used in the request." 1/ In another case, which was analyzed in detail, a request profile of 26 terms that had been intuitively weighted by the customer resulted in the machine listing of 246 presumably responsive documents. Of these, 81 documents were of primary interest to the customer, and an additional 78 were of secondary interest to him. 2/ The statistical association technique as proposed by Stiles has also been investi- gated at the Datatrol Corporation, with particular reference to the field of legal literature (Hammond et al, 1962 [251]). About 350 documents in the field of Federal public law were indexed in cooperation with George Washington University, using a vocabulary of 680 index terms. A computer program was written for the IBM 7090 can accommodate a 1200 x 1200 matrix to calculate the Stiles' association factors. were made of various thresholds to determine which other terms were sufficiently association strength to a particular term to be selected for that term's profile. that Trials high in Given the generation of the term profiles, a less sophisticated computer such as the 1401 can be used for the expansion of request terms and the actual conduct of searches. Such a program was demonstrated at the Annual Meeting of the American Bar Association, August 1962, with running of "live" requests suggested by jurists and with what are claimed to be "highly gratifying results". A point of interest relates to the question of updating of term-profiles and other statistical association factor data. Hammond, et al report: "The term profiles were generated a total of three times in the course of the pilot study, making it possible, to some extent, to assess the effect of vocabulary growth. Judging from this limited experience, it appears that a bi- monthly, or perhaps even quarterly, recompilation of term profiles should be sufficient for a mature collection." 34 6.2.3 The Association Map - Doyle and Related Work at SDC The name of Doyle is again that of an early and prolific investigator and innovator in the field of mechanized documentation and linguistic data processing. One of his provocative suggestions is generally known, in his own terminology, as that of "semantic road maps for literature searchers" or an "association map" technique. As a matter of convenience, we have chosen to consider this suggestion and a variety of related work 1/ 2/ 3/ Stiles, 1961 [577], pp. 198-199. Stiles, 1962 [573], p.9. Hammond et al, 1962 [251], p.6. [OCRerr]22