Document (#29758)

Author

McCrea, R.

Title

Evaluation of two library-based and one expert reference service on the Web

Source

Library review. 53(2004) no.1, S.11-16

Year

2004

Abstract

It has become increasingly common for libraries to provide a reference service which operates via e-mail or through online forms. This paper compares the performance of three digital reference services available on the World Wide Web, namely, AllExperts, Ask a Librarian, and Internet Public Library (a fourth service, Ask Bob, was included initially but eventually excluded). The online digital reference/"expert" services are generally very effective; most provide an answer within three days, and include suggestions for sources of further information. Although the general response rate from all the services was good, library-based services were found to be more trustworthy since they provided the answers together with the sources.

Content

Vgl. auch unter: http://www.emeraldinsight.com/10.1108/00242530410514748.

Theme

Informationsdienstleistungen
Internet

Object

AllExperts
Ask a Librarian
Ask Bob
Internet Public Library

Similar documents (content)

1. Janes, J.; Hill, C.; Rolfe, A.: Ask-an-expert services analysis (2001) 0.36

   0.3614512 = sum of:
     0.3614512 = product of:
       1.0040311 = sum of:
         0.053123232 = weight(abstract_txt:suggestions in 6847) [ClassicSimilarity], result of:
           0.053123232 = score(doc=6847,freq=1.0), product of:
             0.14182493 = queryWeight, product of:
               1.0130086 = boost
               5.993105 = idf(docFreq=299, maxDocs=44218)
               0.023360793 = queryNorm
             0.37456906 = fieldWeight in 6847, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.993105 = idf(docFreq=299, maxDocs=44218)
               0.0625 = fieldNorm(doc=6847)
         0.05670095 = weight(abstract_txt:rate in 6847) [ClassicSimilarity], result of:
           0.05670095 = score(doc=6847,freq=1.0), product of:
             0.14812322 = queryWeight, product of:
               1.0352576 = boost
               6.124733 = idf(docFreq=262, maxDocs=44218)
               0.023360793 = queryNorm
             0.3827958 = fieldWeight in 6847, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.124733 = idf(docFreq=262, maxDocs=44218)
               0.0625 = fieldNorm(doc=6847)
         0.08610909 = weight(abstract_txt:answers in 6847) [ClassicSimilarity], result of:
           0.08610909 = score(doc=6847,freq=2.0), product of:
             0.1553289 = queryWeight, product of:
               1.0601394 = boost
               6.2719374 = idf(docFreq=226, maxDocs=44218)
               0.023360793 = queryNorm
             0.5543662 = fieldWeight in 6847, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.2719374 = idf(docFreq=226, maxDocs=44218)
               0.0625 = fieldNorm(doc=6847)
         0.08978465 = weight(abstract_txt:digital in 6847) [ClassicSimilarity], result of:
           0.08978465 = score(doc=6847,freq=5.0), product of:
             0.14826922 = queryWeight, product of:
               1.4647967 = boost
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.023360793 = queryNorm
             0.60555154 = fieldWeight in 6847, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.0625 = fieldNorm(doc=6847)
         0.04791939 = weight(abstract_txt:library in 6847) [ClassicSimilarity], result of:
           0.04791939 = score(doc=6847,freq=4.0), product of:
             0.12029776 = queryWeight, product of:
               1.6159438 = boost
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.023360793 = queryNorm
             0.39833984 = fieldWeight in 6847, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.0625 = fieldNorm(doc=6847)
         0.18455322 = weight(abstract_txt:expert in 6847) [ClassicSimilarity], result of:
           0.18455322 = score(doc=6847,freq=4.0), product of:
             0.2582066 = queryWeight, product of:
               1.9330163 = boost
               5.7180014 = idf(docFreq=394, maxDocs=44218)
               0.023360793 = queryNorm
             0.7147502 = fieldWeight in 6847, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.7180014 = idf(docFreq=394, maxDocs=44218)
               0.0625 = fieldNorm(doc=6847)
         0.070813306 = weight(abstract_txt:service in 6847) [ClassicSimilarity], result of:
           0.070813306 = score(doc=6847,freq=1.0), product of:
             0.24774978 = queryWeight, product of:
               2.319018 = boost
               4.5732145 = idf(docFreq=1240, maxDocs=44218)
               0.023360793 = queryNorm
             0.2858259 = fieldWeight in 6847, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5732145 = idf(docFreq=1240, maxDocs=44218)
               0.0625 = fieldNorm(doc=6847)
         0.21884045 = weight(abstract_txt:services in 6847) [ClassicSimilarity], result of:
           0.21884045 = score(doc=6847,freq=9.0), product of:
             0.27813384 = queryWeight, product of:
               2.837225 = boost
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.023360793 = queryNorm
             0.7868171 = fieldWeight in 6847, product of:
               3.0 = tf(freq=9.0), with freq of:
                 9.0 = termFreq=9.0
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.0625 = fieldNorm(doc=6847)
         0.19618683 = weight(abstract_txt:reference in 6847) [ClassicSimilarity], result of:
           0.19618683 = score(doc=6847,freq=5.0), product of:
             0.31456193 = queryWeight, product of:
               3.01731 = boost
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.023360793 = queryNorm
             0.6236827 = fieldWeight in 6847, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.0625 = fieldNorm(doc=6847)
       0.36 = coord(9/25)
   

2. Kenney, A.R.; McGovern, N.Y.; Martinez, I.T.; Heidig, L.J.: Google meets eBay : what academic librarians can learn from alternative information providers (2003) 0.36

   0.35633293 = sum of:
     0.35633293 = product of:
       0.8098476 = sum of:
         0.03997597 = weight(abstract_txt:librarian in 1200) [ClassicSimilarity], result of:
           0.03997597 = score(doc=1200,freq=1.0), product of:
             0.14214168 = queryWeight, product of:
               1.0141392 = boost
               5.9997935 = idf(docFreq=297, maxDocs=44218)
               0.023360793 = queryNorm
             0.2812403 = fieldWeight in 1200, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.9997935 = idf(docFreq=297, maxDocs=44218)
               0.046875 = fieldNorm(doc=1200)
         0.09133247 = weight(abstract_txt:answers in 1200) [ClassicSimilarity], result of:
           0.09133247 = score(doc=1200,freq=4.0), product of:
             0.1553289 = queryWeight, product of:
               1.0601394 = boost
               6.2719374 = idf(docFreq=226, maxDocs=44218)
               0.023360793 = queryNorm
             0.5879941 = fieldWeight in 1200, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.2719374 = idf(docFreq=226, maxDocs=44218)
               0.046875 = fieldNorm(doc=1200)
         0.011993488 = weight(abstract_txt:based in 1200) [ClassicSimilarity], result of:
           0.011993488 = score(doc=1200,freq=1.0), product of:
             0.08025937 = queryWeight, product of:
               1.0777045 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.023360793 = queryNorm
             0.14943412 = fieldWeight in 1200, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.046875 = fieldNorm(doc=1200)
         0.018241126 = weight(abstract_txt:online in 1200) [ClassicSimilarity], result of:
           0.018241126 = score(doc=1200,freq=1.0), product of:
             0.10614508 = queryWeight, product of:
               1.2393723 = boost
               3.6661522 = idf(docFreq=3073, maxDocs=44218)
               0.023360793 = queryNorm
             0.17185089 = fieldWeight in 1200, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6661522 = idf(docFreq=3073, maxDocs=44218)
               0.046875 = fieldNorm(doc=1200)
         0.033962272 = weight(abstract_txt:provide in 1200) [ClassicSimilarity], result of:
           0.033962272 = score(doc=1200,freq=2.0), product of:
             0.12750286 = queryWeight, product of:
               1.3583504 = boost
               4.0180984 = idf(docFreq=2161, maxDocs=44218)
               0.023360793 = queryNorm
             0.26636478 = fieldWeight in 1200, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.0180984 = idf(docFreq=2161, maxDocs=44218)
               0.046875 = fieldNorm(doc=1200)
         0.0425886 = weight(abstract_txt:digital in 1200) [ClassicSimilarity], result of:
           0.0425886 = score(doc=1200,freq=2.0), product of:
             0.14826922 = queryWeight, product of:
               1.4647967 = boost
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.023360793 = queryNorm
             0.2872383 = fieldWeight in 1200, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.046875 = fieldNorm(doc=1200)
         0.03593954 = weight(abstract_txt:library in 1200) [ClassicSimilarity], result of:
           0.03593954 = score(doc=1200,freq=4.0), product of:
             0.12029776 = queryWeight, product of:
               1.6159438 = boost
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.023360793 = queryNorm
             0.29875487 = fieldWeight in 1200, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.046875 = fieldNorm(doc=1200)
         0.09787413 = weight(abstract_txt:expert in 1200) [ClassicSimilarity], result of:
           0.09787413 = score(doc=1200,freq=2.0), product of:
             0.2582066 = queryWeight, product of:
               1.9330163 = boost
               5.7180014 = idf(docFreq=394, maxDocs=44218)
               0.023360793 = queryNorm
             0.37905353 = fieldWeight in 1200, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.7180014 = idf(docFreq=394, maxDocs=44218)
               0.046875 = fieldNorm(doc=1200)
         0.07510885 = weight(abstract_txt:service in 1200) [ClassicSimilarity], result of:
           0.07510885 = score(doc=1200,freq=2.0), product of:
             0.24774978 = queryWeight, product of:
               2.319018 = boost
               4.5732145 = idf(docFreq=1240, maxDocs=44218)
               0.023360793 = queryNorm
             0.30316415 = fieldWeight in 1200, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.5732145 = idf(docFreq=1240, maxDocs=44218)
               0.046875 = fieldNorm(doc=1200)
         0.15474357 = weight(abstract_txt:services in 1200) [ClassicSimilarity], result of:
           0.15474357 = score(doc=1200,freq=8.0), product of:
             0.27813384 = queryWeight, product of:
               2.837225 = boost
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.023360793 = queryNorm
             0.5563637 = fieldWeight in 1200, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.046875 = fieldNorm(doc=1200)
         0.20808755 = weight(abstract_txt:reference in 1200) [ClassicSimilarity], result of:
           0.20808755 = score(doc=1200,freq=10.0), product of:
             0.31456193 = queryWeight, product of:
               3.01731 = boost
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.023360793 = queryNorm
             0.66151536 = fieldWeight in 1200, product of:
               3.1622777 = tf(freq=10.0), with freq of:
                 10.0 = termFreq=10.0
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.046875 = fieldNorm(doc=1200)
       0.44 = coord(11/25)
   

3. Chowdhury, G.G.: Digital libraries and reference services : present and future (2002) 0.32

   0.31674474 = sum of:
     0.31674474 = product of:
       0.8798465 = sum of:
         0.07537942 = weight(abstract_txt:librarian in 4466) [ClassicSimilarity], result of:
           0.07537942 = score(doc=4466,freq=2.0), product of:
             0.14214168 = queryWeight, product of:
               1.0141392 = boost
               5.9997935 = idf(docFreq=297, maxDocs=44218)
               0.023360793 = queryNorm
             0.5303118 = fieldWeight in 4466, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.9997935 = idf(docFreq=297, maxDocs=44218)
               0.0625 = fieldNorm(doc=4466)
         0.015991317 = weight(abstract_txt:based in 4466) [ClassicSimilarity], result of:
           0.015991317 = score(doc=4466,freq=1.0), product of:
             0.08025937 = queryWeight, product of:
               1.0777045 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.023360793 = queryNorm
             0.19924548 = fieldWeight in 4466, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.0625 = fieldNorm(doc=4466)
         0.0243215 = weight(abstract_txt:online in 4466) [ClassicSimilarity], result of:
           0.0243215 = score(doc=4466,freq=1.0), product of:
             0.10614508 = queryWeight, product of:
               1.2393723 = boost
               3.6661522 = idf(docFreq=3073, maxDocs=44218)
               0.023360793 = queryNorm
             0.22913451 = fieldWeight in 4466, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6661522 = idf(docFreq=3073, maxDocs=44218)
               0.0625 = fieldNorm(doc=4466)
         0.13909379 = weight(abstract_txt:digital in 4466) [ClassicSimilarity], result of:
           0.13909379 = score(doc=4466,freq=12.0), product of:
             0.14826922 = queryWeight, product of:
               1.4647967 = boost
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.023360793 = queryNorm
             0.9381164 = fieldWeight in 4466, product of:
               3.4641016 = tf(freq=12.0), with freq of:
                 12.0 = termFreq=12.0
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.0625 = fieldNorm(doc=4466)
         0.07462372 = weight(abstract_txt:sources in 4466) [ClassicSimilarity], result of:
           0.07462372 = score(doc=4466,freq=2.0), product of:
             0.17788835 = queryWeight, product of:
               1.6044478 = boost
               4.7460723 = idf(docFreq=1043, maxDocs=44218)
               0.023360793 = queryNorm
             0.4194975 = fieldWeight in 4466, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.7460723 = idf(docFreq=1043, maxDocs=44218)
               0.0625 = fieldNorm(doc=4466)
         0.041499406 = weight(abstract_txt:library in 4466) [ClassicSimilarity], result of:
           0.041499406 = score(doc=4466,freq=3.0), product of:
             0.12029776 = queryWeight, product of:
               1.6159438 = boost
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.023360793 = queryNorm
             0.3449724 = fieldWeight in 4466, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.0625 = fieldNorm(doc=4466)
         0.070813306 = weight(abstract_txt:service in 4466) [ClassicSimilarity], result of:
           0.070813306 = score(doc=4466,freq=1.0), product of:
             0.24774978 = queryWeight, product of:
               2.319018 = boost
               4.5732145 = idf(docFreq=1240, maxDocs=44218)
               0.023360793 = queryNorm
             0.2858259 = fieldWeight in 4466, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5732145 = idf(docFreq=1240, maxDocs=44218)
               0.0625 = fieldNorm(doc=4466)
         0.24193723 = weight(abstract_txt:services in 4466) [ClassicSimilarity], result of:
           0.24193723 = score(doc=4466,freq=11.0), product of:
             0.27813384 = queryWeight, product of:
               2.837225 = boost
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.023360793 = queryNorm
             0.86985904 = fieldWeight in 4466, product of:
               3.3166249 = tf(freq=11.0), with freq of:
                 11.0 = termFreq=11.0
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.0625 = fieldNorm(doc=4466)
         0.19618683 = weight(abstract_txt:reference in 4466) [ClassicSimilarity], result of:
           0.19618683 = score(doc=4466,freq=5.0), product of:
             0.31456193 = queryWeight, product of:
               3.01731 = boost
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.023360793 = queryNorm
             0.6236827 = fieldWeight in 4466, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.0625 = fieldNorm(doc=4466)
       0.36 = coord(9/25)
   

4. Cloughley, K.: Digital reference services : how do the library-based services compare with the expert services? (2004) 0.28

   0.28264254 = sum of:
     0.28264254 = product of:
       0.78511816 = sum of:
         0.06387855 = weight(abstract_txt:answer in 4759) [ClassicSimilarity], result of:
           0.06387855 = score(doc=4759,freq=1.0), product of:
             0.13820581 = queryWeight, product of:
               5.916144 = idf(docFreq=323, maxDocs=44218)
               0.023360793 = queryNorm
             0.46219873 = fieldWeight in 4759, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.916144 = idf(docFreq=323, maxDocs=44218)
               0.078125 = fieldNorm(doc=4759)
         0.06673868 = weight(abstract_txt:mail in 4759) [ClassicSimilarity], result of:
           0.06673868 = score(doc=4759,freq=1.0), product of:
             0.14230102 = queryWeight, product of:
               1.0147074 = boost
               6.003155 = idf(docFreq=296, maxDocs=44218)
               0.023360793 = queryNorm
             0.4689965 = fieldWeight in 4759, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.003155 = idf(docFreq=296, maxDocs=44218)
               0.078125 = fieldNorm(doc=4759)
         0.107636355 = weight(abstract_txt:answers in 4759) [ClassicSimilarity], result of:
           0.107636355 = score(doc=4759,freq=2.0), product of:
             0.1553289 = queryWeight, product of:
               1.0601394 = boost
               6.2719374 = idf(docFreq=226, maxDocs=44218)
               0.023360793 = queryNorm
             0.6929577 = fieldWeight in 4759, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.2719374 = idf(docFreq=226, maxDocs=44218)
               0.078125 = fieldNorm(doc=4759)
         0.02826892 = weight(abstract_txt:based in 4759) [ClassicSimilarity], result of:
           0.02826892 = score(doc=4759,freq=2.0), product of:
             0.08025937 = queryWeight, product of:
               1.0777045 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.023360793 = queryNorm
             0.35221958 = fieldWeight in 4759, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.078125 = fieldNorm(doc=4759)
         0.040024925 = weight(abstract_txt:provide in 4759) [ClassicSimilarity], result of:
           0.040024925 = score(doc=4759,freq=1.0), product of:
             0.12750286 = queryWeight, product of:
               1.3583504 = boost
               4.0180984 = idf(docFreq=2161, maxDocs=44218)
               0.023360793 = queryNorm
             0.31391394 = fieldWeight in 4759, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.0180984 = idf(docFreq=2161, maxDocs=44218)
               0.078125 = fieldNorm(doc=4759)
         0.050191145 = weight(abstract_txt:digital in 4759) [ClassicSimilarity], result of:
           0.050191145 = score(doc=4759,freq=1.0), product of:
             0.14826922 = queryWeight, product of:
               1.4647967 = boost
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.023360793 = queryNorm
             0.33851358 = fieldWeight in 4759, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.078125 = fieldNorm(doc=4759)
         0.11534576 = weight(abstract_txt:expert in 4759) [ClassicSimilarity], result of:
           0.11534576 = score(doc=4759,freq=1.0), product of:
             0.2582066 = queryWeight, product of:
               1.9330163 = boost
               5.7180014 = idf(docFreq=394, maxDocs=44218)
               0.023360793 = queryNorm
             0.44671887 = fieldWeight in 4759, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.7180014 = idf(docFreq=394, maxDocs=44218)
               0.078125 = fieldNorm(doc=4759)
         0.15793449 = weight(abstract_txt:services in 4759) [ClassicSimilarity], result of:
           0.15793449 = score(doc=4759,freq=3.0), product of:
             0.27813384 = queryWeight, product of:
               2.837225 = boost
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.023360793 = queryNorm
             0.5678363 = fieldWeight in 4759, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.078125 = fieldNorm(doc=4759)
         0.15509932 = weight(abstract_txt:reference in 4759) [ClassicSimilarity], result of:
           0.15509932 = score(doc=4759,freq=2.0), product of:
             0.31456193 = queryWeight, product of:
               3.01731 = boost
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.023360793 = queryNorm
             0.49306446 = fieldWeight in 4759, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.078125 = fieldNorm(doc=4759)
       0.36 = coord(9/25)
   

5. Lochore, S.: How good are the free digital reference services? : a comparison of library-based and expert services (2004) 0.28

   0.28098947 = sum of:
     0.28098947 = product of:
       0.8780921 = sum of:
         0.06662662 = weight(abstract_txt:librarian in 747) [ClassicSimilarity], result of:
           0.06662662 = score(doc=747,freq=1.0), product of:
             0.14214168 = queryWeight, product of:
               1.0141392 = boost
               5.9997935 = idf(docFreq=297, maxDocs=44218)
               0.023360793 = queryNorm
             0.46873388 = fieldWeight in 747, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.9997935 = idf(docFreq=297, maxDocs=44218)
               0.078125 = fieldNorm(doc=747)
         0.06673868 = weight(abstract_txt:mail in 747) [ClassicSimilarity], result of:
           0.06673868 = score(doc=747,freq=1.0), product of:
             0.14230102 = queryWeight, product of:
               1.0147074 = boost
               6.003155 = idf(docFreq=296, maxDocs=44218)
               0.023360793 = queryNorm
             0.4689965 = fieldWeight in 747, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.003155 = idf(docFreq=296, maxDocs=44218)
               0.078125 = fieldNorm(doc=747)
         0.07776236 = weight(abstract_txt:namely in 747) [ClassicSimilarity], result of:
           0.07776236 = score(doc=747,freq=1.0), product of:
             0.15756842 = queryWeight, product of:
               1.0677546 = boost
               6.31699 = idf(docFreq=216, maxDocs=44218)
               0.023360793 = queryNorm
             0.49351484 = fieldWeight in 747, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.31699 = idf(docFreq=216, maxDocs=44218)
               0.078125 = fieldNorm(doc=747)
         0.08693361 = weight(abstract_txt:digital in 747) [ClassicSimilarity], result of:
           0.08693361 = score(doc=747,freq=3.0), product of:
             0.14826922 = queryWeight, product of:
               1.4647967 = boost
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.023360793 = queryNorm
             0.5863227 = fieldWeight in 747, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.078125 = fieldNorm(doc=747)
         0.053138856 = weight(abstract_txt:three in 747) [ClassicSimilarity], result of:
           0.053138856 = score(doc=747,freq=1.0), product of:
             0.15401903 = queryWeight, product of:
               1.4929286 = boost
               4.41619 = idf(docFreq=1451, maxDocs=44218)
               0.023360793 = queryNorm
             0.34501487 = fieldWeight in 747, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.41619 = idf(docFreq=1451, maxDocs=44218)
               0.078125 = fieldNorm(doc=747)
         0.12518142 = weight(abstract_txt:service in 747) [ClassicSimilarity], result of:
           0.12518142 = score(doc=747,freq=2.0), product of:
             0.24774978 = queryWeight, product of:
               2.319018 = boost
               4.5732145 = idf(docFreq=1240, maxDocs=44218)
               0.023360793 = queryNorm
             0.5052736 = fieldWeight in 747, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.5732145 = idf(docFreq=1240, maxDocs=44218)
               0.078125 = fieldNorm(doc=747)
         0.18236704 = weight(abstract_txt:services in 747) [ClassicSimilarity], result of:
           0.18236704 = score(doc=747,freq=4.0), product of:
             0.27813384 = queryWeight, product of:
               2.837225 = boost
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.023360793 = queryNorm
             0.6556809 = fieldWeight in 747, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.078125 = fieldNorm(doc=747)
         0.21934353 = weight(abstract_txt:reference in 747) [ClassicSimilarity], result of:
           0.21934353 = score(doc=747,freq=4.0), product of:
             0.31456193 = queryWeight, product of:
               3.01731 = boost
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.023360793 = queryNorm
             0.6972984 = fieldWeight in 747, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.078125 = fieldNorm(doc=747)
       0.32 = coord(8/25)