Document (#39131)

Author

Wu, I.-C.
Niu, Y.-F.

Title

Effects of anchoring process under preference stabilities for interactive movie recommendations

Source

Journal of the Association for Information Science and Technology. 66(2015) no.8, S.1673-1695

Year

2015

Abstract

This study explores how the stability of users' preferences influences recommendation results and how this stability relates to the effectiveness of developing recommendation strategies. In this work, we propose an anchor-based hybrid filtering approach (AHF) to naturally measure and capture the user's preference stabilities for movie genres. That is, a pairwise preference of the genre comparison process with the genre-based fuzzy inference filtering was conducted in order to achieve effective interactive recommendations. To conduct this experiment, we recruited 30 users with different levels of preference stability for movie genres. The experimental results show that the proposed AHF approach can effectively capture the user's preferences and filter out undesired movie genres. In addition, this approach can give a more precise recommendation than one without the anchoring process, especially for the user who has unstable preferences for movie genres. Our proposed approach achieves statistical significance and outperforms the baseline method for recommending users' favorite movies by more than 63% for the stable user group and 77% for the unstable group. The results suggest that the stability of users' preferences is a factor to be considered when developing effective recommendation strategies.

Content

Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23280/abstract.

Form

Filme

Similar documents (content)

1. Kannan, R.; Ghinea, G.; Swaminathan, S.: What do you wish to see? : A summarization system for movies based on user preferences (2015) 0.37

   0.3749942 = sum of:
     0.3749942 = product of:
       1.1718569 = sum of:
         0.03544001 = weight(abstract_txt:proposed in 2683) [ClassicSimilarity], result of:
           0.03544001 = score(doc=2683,freq=5.0), product of:
             0.06287594 = queryWeight, product of:
               4.6093135 = idf(docFreq=1196, maxDocs=44218)
               0.013641065 = queryNorm
             0.5636498 = fieldWeight in 2683, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.6093135 = idf(docFreq=1196, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2683)
         0.010252637 = weight(abstract_txt:results in 2683) [ClassicSimilarity], result of:
           0.010252637 = score(doc=2683,freq=1.0), product of:
             0.053835172 = queryWeight, product of:
               1.1332779 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.013641065 = queryNorm
             0.19044496 = fieldWeight in 2683, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2683)
         0.031937946 = weight(abstract_txt:user's in 2683) [ClassicSimilarity], result of:
           0.031937946 = score(doc=2683,freq=1.0), product of:
             0.10031132 = queryWeight, product of:
               1.2630854 = boost
               5.8219566 = idf(docFreq=355, maxDocs=44218)
               0.013641065 = queryNorm
             0.31838825 = fieldWeight in 2683, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8219566 = idf(docFreq=355, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2683)
         0.008039638 = weight(abstract_txt:this in 2683) [ClassicSimilarity], result of:
           0.008039638 = score(doc=2683,freq=2.0), product of:
             0.04307973 = queryWeight, product of:
               1.3087727 = boost
               2.4130175 = idf(docFreq=10762, maxDocs=44218)
               0.013641065 = queryNorm
             0.1866223 = fieldWeight in 2683, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4130175 = idf(docFreq=10762, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2683)
         0.014724947 = weight(abstract_txt:users in 2683) [ClassicSimilarity], result of:
           0.014724947 = score(doc=2683,freq=1.0), product of:
             0.075426586 = queryWeight, product of:
               1.5489413 = boost
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.013641065 = queryNorm
             0.19522223 = fieldWeight in 2683, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2683)
         0.017005902 = weight(abstract_txt:approach in 2683) [ClassicSimilarity], result of:
           0.017005902 = score(doc=2683,freq=1.0), product of:
             0.08302746 = queryWeight, product of:
               1.6251131 = boost
               3.745328 = idf(docFreq=2839, maxDocs=44218)
               0.013641065 = queryNorm
             0.20482263 = fieldWeight in 2683, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.745328 = idf(docFreq=2839, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2683)
         0.21134834 = weight(abstract_txt:preferences in 2683) [ClassicSimilarity], result of:
           0.21134834 = score(doc=2683,freq=5.0), product of:
             0.26051408 = queryWeight, product of:
               2.8786466 = boost
               6.634292 = idf(docFreq=157, maxDocs=44218)
               0.013641065 = queryNorm
             0.8112742 = fieldWeight in 2683, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               6.634292 = idf(docFreq=157, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2683)
         0.8431074 = weight(abstract_txt:movie in 2683) [ClassicSimilarity], result of:
           0.8431074 = score(doc=2683,freq=13.0), product of:
             0.5133333 = queryWeight, product of:
               4.5178046 = boost
               8.329592 = idf(docFreq=28, maxDocs=44218)
               0.013641065 = queryNorm
             1.6424171 = fieldWeight in 2683, product of:
               3.6055512 = tf(freq=13.0), with freq of:
                 13.0 = termFreq=13.0
               8.329592 = idf(docFreq=28, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2683)
       0.32 = coord(8/25)
   

2. Tommasel, A.; Godoy, D.: Learning and adapting user criteria for recommending followees in social networks (2017) 0.21

   0.2084841 = sum of:
     0.2084841 = product of:
       0.6515128 = sum of:
         0.03202033 = weight(abstract_txt:proposed in 3745) [ClassicSimilarity], result of:
           0.03202033 = score(doc=3745,freq=2.0), product of:
             0.06287594 = queryWeight, product of:
               4.6093135 = idf(docFreq=1196, maxDocs=44218)
               0.013641065 = queryNorm
             0.509262 = fieldWeight in 3745, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.6093135 = idf(docFreq=1196, maxDocs=44218)
               0.078125 = fieldNorm(doc=3745)
         0.043968614 = weight(abstract_txt:strategies in 3745) [ClassicSimilarity], result of:
           0.043968614 = score(doc=3745,freq=2.0), product of:
             0.07767761 = queryWeight, product of:
               1.1114902 = boost
               5.123207 = idf(docFreq=715, maxDocs=44218)
               0.013641065 = queryNorm
             0.56603974 = fieldWeight in 3745, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.123207 = idf(docFreq=715, maxDocs=44218)
               0.078125 = fieldNorm(doc=3745)
         0.014646625 = weight(abstract_txt:results in 3745) [ClassicSimilarity], result of:
           0.014646625 = score(doc=3745,freq=1.0), product of:
             0.053835172 = queryWeight, product of:
               1.1332779 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.013641065 = queryNorm
             0.27206424 = fieldWeight in 3745, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.078125 = fieldNorm(doc=3745)
         0.04386867 = weight(abstract_txt:recommendations in 3745) [ClassicSimilarity], result of:
           0.04386867 = score(doc=3745,freq=1.0), product of:
             0.09771929 = queryWeight, product of:
               1.2466596 = boost
               5.746245 = idf(docFreq=383, maxDocs=44218)
               0.013641065 = queryNorm
             0.44892538 = fieldWeight in 3745, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.746245 = idf(docFreq=383, maxDocs=44218)
               0.078125 = fieldNorm(doc=3745)
         0.045625634 = weight(abstract_txt:user's in 3745) [ClassicSimilarity], result of:
           0.045625634 = score(doc=3745,freq=1.0), product of:
             0.10031132 = queryWeight, product of:
               1.2630854 = boost
               5.8219566 = idf(docFreq=355, maxDocs=44218)
               0.013641065 = queryNorm
             0.45484036 = fieldWeight in 3745, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8219566 = idf(docFreq=355, maxDocs=44218)
               0.078125 = fieldNorm(doc=3745)
         0.008121261 = weight(abstract_txt:this in 3745) [ClassicSimilarity], result of:
           0.008121261 = score(doc=3745,freq=1.0), product of:
             0.04307973 = queryWeight, product of:
               1.3087727 = boost
               2.4130175 = idf(docFreq=10762, maxDocs=44218)
               0.013641065 = queryNorm
             0.18851699 = fieldWeight in 3745, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4130175 = idf(docFreq=10762, maxDocs=44218)
               0.078125 = fieldNorm(doc=3745)
         0.23387103 = weight(abstract_txt:preferences in 3745) [ClassicSimilarity], result of:
           0.23387103 = score(doc=3745,freq=3.0), product of:
             0.26051408 = queryWeight, product of:
               2.8786466 = boost
               6.634292 = idf(docFreq=157, maxDocs=44218)
               0.013641065 = queryNorm
             0.8977289 = fieldWeight in 3745, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.634292 = idf(docFreq=157, maxDocs=44218)
               0.078125 = fieldNorm(doc=3745)
         0.22939064 = weight(abstract_txt:recommendation in 3745) [ClassicSimilarity], result of:
           0.22939064 = score(doc=3745,freq=2.0), product of:
             0.2943932 = queryWeight, product of:
               3.060107 = boost
               7.0524964 = idf(docFreq=103, maxDocs=44218)
               0.013641065 = queryNorm
             0.7791981 = fieldWeight in 3745, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.0524964 = idf(docFreq=103, maxDocs=44218)
               0.078125 = fieldNorm(doc=3745)
       0.32 = coord(8/25)
   

3. Tang, M.-C.; Liao, I.-H.: Preference diversity and openness to novelty : scales construction from the perspective of movie recommendation (2022) 0.20

   0.19955647 = sum of:
     0.19955647 = product of:
       0.83148533 = sum of:
         0.03517489 = weight(abstract_txt:strategies in 648) [ClassicSimilarity], result of:
           0.03517489 = score(doc=648,freq=2.0), product of:
             0.07767761 = queryWeight, product of:
               1.1114902 = boost
               5.123207 = idf(docFreq=715, maxDocs=44218)
               0.013641065 = queryNorm
             0.4528318 = fieldWeight in 648, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.123207 = idf(docFreq=715, maxDocs=44218)
               0.0625 = fieldNorm(doc=648)
         0.035094935 = weight(abstract_txt:recommendations in 648) [ClassicSimilarity], result of:
           0.035094935 = score(doc=648,freq=1.0), product of:
             0.09771929 = queryWeight, product of:
               1.2466596 = boost
               5.746245 = idf(docFreq=383, maxDocs=44218)
               0.013641065 = queryNorm
             0.3591403 = fieldWeight in 648, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.746245 = idf(docFreq=383, maxDocs=44218)
               0.0625 = fieldNorm(doc=648)
         0.023799108 = weight(abstract_txt:users in 648) [ClassicSimilarity], result of:
           0.023799108 = score(doc=648,freq=2.0), product of:
             0.075426586 = queryWeight, product of:
               1.5489413 = boost
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.013641065 = queryNorm
             0.31552678 = fieldWeight in 648, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.0625 = fieldNorm(doc=648)
         0.28666285 = weight(abstract_txt:preference in 648) [ClassicSimilarity], result of:
           0.28666285 = score(doc=648,freq=5.0), product of:
             0.2920238 = queryWeight, product of:
               3.0477676 = boost
               7.0240583 = idf(docFreq=106, maxDocs=44218)
               0.013641065 = queryNorm
             0.981642 = fieldWeight in 648, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               7.0240583 = idf(docFreq=106, maxDocs=44218)
               0.0625 = fieldNorm(doc=648)
         0.18351251 = weight(abstract_txt:recommendation in 648) [ClassicSimilarity], result of:
           0.18351251 = score(doc=648,freq=2.0), product of:
             0.2943932 = queryWeight, product of:
               3.060107 = boost
               7.0524964 = idf(docFreq=103, maxDocs=44218)
               0.013641065 = queryNorm
             0.6233585 = fieldWeight in 648, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.0524964 = idf(docFreq=103, maxDocs=44218)
               0.0625 = fieldNorm(doc=648)
         0.26724106 = weight(abstract_txt:movie in 648) [ClassicSimilarity], result of:
           0.26724106 = score(doc=648,freq=1.0), product of:
             0.5133333 = queryWeight, product of:
               4.5178046 = boost
               8.329592 = idf(docFreq=28, maxDocs=44218)
               0.013641065 = queryNorm
             0.5205995 = fieldWeight in 648, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.329592 = idf(docFreq=28, maxDocs=44218)
               0.0625 = fieldNorm(doc=648)
       0.24 = coord(6/25)
   

4. Orso, V.; Ruotsalo, T.; Leino, J.; Gamberini, L.; Jacucci, G.: Overlaying social information : the effects on users' search and information-selection behavior (2017) 0.20

   0.19933698 = sum of:
     0.19933698 = product of:
       0.5537138 = sum of:
         0.015849253 = weight(abstract_txt:proposed in 5097) [ClassicSimilarity], result of:
           0.015849253 = score(doc=5097,freq=1.0), product of:
             0.06287594 = queryWeight, product of:
               4.6093135 = idf(docFreq=1196, maxDocs=44218)
               0.013641065 = queryNorm
             0.25207183 = fieldWeight in 5097, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6093135 = idf(docFreq=1196, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5097)
         0.010252637 = weight(abstract_txt:results in 5097) [ClassicSimilarity], result of:
           0.010252637 = score(doc=5097,freq=1.0), product of:
             0.053835172 = queryWeight, product of:
               1.1332779 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.013641065 = queryNorm
             0.19044496 = fieldWeight in 5097, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5097)
         0.05548135 = weight(abstract_txt:interactive in 5097) [ClassicSimilarity], result of:
           0.05548135 = score(doc=5097,freq=4.0), product of:
             0.09131805 = queryWeight, product of:
               1.205136 = boost
               5.5548496 = idf(docFreq=464, maxDocs=44218)
               0.013641065 = queryNorm
             0.6075617 = fieldWeight in 5097, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.5548496 = idf(docFreq=464, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5097)
         0.031937946 = weight(abstract_txt:user's in 5097) [ClassicSimilarity], result of:
           0.031937946 = score(doc=5097,freq=1.0), product of:
             0.10031132 = queryWeight, product of:
               1.2630854 = boost
               5.8219566 = idf(docFreq=355, maxDocs=44218)
               0.013641065 = queryNorm
             0.31838825 = fieldWeight in 5097, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8219566 = idf(docFreq=355, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5097)
         0.016139193 = weight(abstract_txt:process in 5097) [ClassicSimilarity], result of:
           0.016139193 = score(doc=5097,freq=1.0), product of:
             0.072850116 = queryWeight, product of:
               1.3183129 = boost
               4.0510116 = idf(docFreq=2091, maxDocs=44218)
               0.013641065 = queryNorm
             0.22153969 = fieldWeight in 5097, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.0510116 = idf(docFreq=2091, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5097)
         0.04522737 = weight(abstract_txt:filtering in 5097) [ClassicSimilarity], result of:
           0.04522737 = score(doc=5097,freq=1.0), product of:
             0.12649679 = queryWeight, product of:
               1.418396 = boost
               6.537832 = idf(docFreq=173, maxDocs=44218)
               0.013641065 = queryNorm
             0.3575377 = fieldWeight in 5097, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.537832 = idf(docFreq=173, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5097)
         0.02082422 = weight(abstract_txt:users in 5097) [ClassicSimilarity], result of:
           0.02082422 = score(doc=5097,freq=2.0), product of:
             0.075426586 = queryWeight, product of:
               1.5489413 = boost
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.013641065 = queryNorm
             0.27608594 = fieldWeight in 5097, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5097)
         0.16370973 = weight(abstract_txt:preferences in 5097) [ClassicSimilarity], result of:
           0.16370973 = score(doc=5097,freq=3.0), product of:
             0.26051408 = queryWeight, product of:
               2.8786466 = boost
               6.634292 = idf(docFreq=157, maxDocs=44218)
               0.013641065 = queryNorm
             0.6284103 = fieldWeight in 5097, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.634292 = idf(docFreq=157, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5097)
         0.19429208 = weight(abstract_txt:preference in 5097) [ClassicSimilarity], result of:
           0.19429208 = score(doc=5097,freq=3.0), product of:
             0.2920238 = queryWeight, product of:
               3.0477676 = boost
               7.0240583 = idf(docFreq=106, maxDocs=44218)
               0.013641065 = queryNorm
             0.6653296 = fieldWeight in 5097, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.0240583 = idf(docFreq=106, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5097)
       0.36 = coord(9/25)
   

5. Mirizzi, R.; Ragone, A.; Noia, T. Di; Sciascio, E. Di: ¬A recommender system for linked data (2012) 0.18

   0.17908 = sum of:
     0.17908 = product of:
       0.74616665 = sum of:
         0.008039638 = weight(abstract_txt:this in 436) [ClassicSimilarity], result of:
           0.008039638 = score(doc=436,freq=2.0), product of:
             0.04307973 = queryWeight, product of:
               1.3087727 = boost
               2.4130175 = idf(docFreq=10762, maxDocs=44218)
               0.013641065 = queryNorm
             0.1866223 = fieldWeight in 436, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4130175 = idf(docFreq=10762, maxDocs=44218)
               0.0546875 = fieldNorm(doc=436)
         0.04766978 = weight(abstract_txt:genre in 436) [ClassicSimilarity], result of:
           0.04766978 = score(doc=436,freq=1.0), product of:
             0.13101089 = queryWeight, product of:
               1.4434822 = boost
               6.653462 = idf(docFreq=154, maxDocs=44218)
               0.013641065 = queryNorm
             0.3638612 = fieldWeight in 436, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.653462 = idf(docFreq=154, maxDocs=44218)
               0.0546875 = fieldNorm(doc=436)
         0.014724947 = weight(abstract_txt:users in 436) [ClassicSimilarity], result of:
           0.014724947 = score(doc=436,freq=1.0), product of:
             0.075426586 = queryWeight, product of:
               1.5489413 = boost
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.013641065 = queryNorm
             0.19522223 = fieldWeight in 436, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.0546875 = fieldNorm(doc=436)
         0.09451786 = weight(abstract_txt:preferences in 436) [ClassicSimilarity], result of:
           0.09451786 = score(doc=436,freq=1.0), product of:
             0.26051408 = queryWeight, product of:
               2.8786466 = boost
               6.634292 = idf(docFreq=157, maxDocs=44218)
               0.013641065 = queryNorm
             0.36281285 = fieldWeight in 436, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.634292 = idf(docFreq=157, maxDocs=44218)
               0.0546875 = fieldNorm(doc=436)
         0.11354257 = weight(abstract_txt:recommendation in 436) [ClassicSimilarity], result of:
           0.11354257 = score(doc=436,freq=1.0), product of:
             0.2943932 = queryWeight, product of:
               3.060107 = boost
               7.0524964 = idf(docFreq=103, maxDocs=44218)
               0.013641065 = queryNorm
             0.3856834 = fieldWeight in 436, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.0524964 = idf(docFreq=103, maxDocs=44218)
               0.0546875 = fieldNorm(doc=436)
         0.46767187 = weight(abstract_txt:movie in 436) [ClassicSimilarity], result of:
           0.46767187 = score(doc=436,freq=4.0), product of:
             0.5133333 = queryWeight, product of:
               4.5178046 = boost
               8.329592 = idf(docFreq=28, maxDocs=44218)
               0.013641065 = queryNorm
             0.9110491 = fieldWeight in 436, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               8.329592 = idf(docFreq=28, maxDocs=44218)
               0.0546875 = fieldNorm(doc=436)
       0.24 = coord(6/25)