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Selecting news to suit a group of criteria: an exploration Judith Masthoff University of Brighton

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Average Strategy ABCDEFGHIJ John10436 968 8 Adam1989796938 Mary10527985676 Group list: (E, F) H (D, J) A I B G C 2118132226 17232022 Use average of the individual ratings

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Least Misery Strategy ABCDEFGHIJ John10436 968 8 Adam1989796938 Mary10527985676 Group list: F E (H, J, D) G B I C A 1426785636 Use minimum of the individual ratings

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Average Without Misery Strategy ABCDEFGHIJ John10436 968 8 Adam1989796938 Mary10527985676 Group list: (E, F) H (D, J) B G -18-2226 1723-22 Use average of the individual ratings, excluding items below threshold (say 4)

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Experiment: How people do it 36 subjects Given ratings of news items on three criteria Which to watch if only time for 1 item, 2 items, …, 7 items

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Criteria used Importance of the news in general Relevance of the location to you Recency of the news ABCDEFGHIJ John10436 968 8 Adam1989796938 Mary10527985676

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Criteria used Importance of the news in general Relevance of the location to you Recency of the news ABCDEFGHIJ Importance10436 968 8 Location1989796938 Recency10527985676

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1234567 s5FEAIJDH s7HB s33JD s22 s1HI s29JDB s20DHIJ s13HJDAI s28 s25DBJ s3AEIHJD s19JADHI Results - Part 1

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1234567 s5FEAIJDH s7HB s33JD s22 s1HI s29JDB s20DHIJ s13HJDAI s28 s25DBJ s3AEIHJD s19JADHI Results - Part 1 Red = Average Strategy

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1234567 s5FEAIJDH s7HB s33JD s22 s1HI s29JDB s20DHIJ s13HJDAI s28 s25DBJ s3AEIHJD s19JADHI Results - Part 1 Red = Average Strategy Shaded =Least Misery Strategy

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s4EFAIHJD s23JH s24B s26JHID s16HIJ s6HJDBI s8G s10AI s12ID s2 s30DAIJ s15JHDAI s27IAJHG s11AFIHJ s21HDBJ Results - Part 2

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s4EFAIHJD s23JH s24B s26JHID s16HIJ s6HJDBI s8G s10AI s12ID s2 s30DAIJ s15JHDAI s27IAJHG s11AFIHJ s21HDBJ Results - Part 2 Red = Average Strategy

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s4EFAIHJD s23JH s24B s26JHID s16HIJ s6HJDBI s8G s10AI s12ID s2 s30DAIJ s15JHDAI s27IAJHG s11AFIHJ s21HDBJ Results - Part 2 Red = Average Strategy Red dotted = Average Without Misery Strategy

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1234567 s14AEIFHJD s31FIB s32DJ s35JHD s36DFIJ s17FEIHJD s18HJDI s34IJFH? Results - Part 3

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Introduction of A and I A (10, 1, 10) I (10, 3, 7) Grey = This experiment Black = Old experiment

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Dealing with inequality

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Average Strategy ABCDEFGHIJ John10436 968 8 Adam1989796938 Mary10527985676 Group list: (E, F) H (D, J) A I B G C 2118132226 17232022 Use average of the individual ratings

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Average over Important Criteria ABCDEFGHIJ John10436 968 8 Mary10527985676 Group list: A E (F, I) (H, J) D G B C 209513191711141714 Use average of the individual ratings

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Least Misery Strategy ABCDEFGHIJ John10436 968 8 Adam1989796938 Mary10527985676 Group list: F E (H, J, D) G B I C A 1426785636 Use minimum of the individual ratings

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Least Misery For Important Criteria ABCDEFGHIJ John10436 968 8 Mary10527985676 Group list: A F E I (H, J, D) G B C 10426985676 Use minimum of the individual ratings

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Average Strategy ABCDEFGHIJ John10436 968 8 Adam1989796938 Mary10527985676 Group list: (E, F) H (D, J) A I B G C 2118132226 17232022 Use average of the individual ratings

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Average Strategy with Weights ABCDEFGHIJ John3012918302718243024 Adam1989796938 Mary3015621272415182118 Group list: E A F I H J D G B C (3-1-3) E F A (H,I) J D G B C (2-1-2) 61362348646039515450 Use average of the individual ratings

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Average Without Misery Strategy ABCDEFGHIJ John10436 968 8 Adam1989796938 Mary10527985676 Group list: (E, F) H (D, J) ---2226 -23-22 Use average of the individual ratings, excluding items below threshold (say 6)

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Average Without Misery for Some ABCDEFGHIJ John10436 968 8 Adam1989796938 Mary10527985676 Group list: (E, F) H (D, J) A I (threshold 6) (E, F) A I (threshold 7) 21--2226 -232022 Use average of the individual ratings, excluding items below threshold (say 6)

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1234567 s5FEAIJDH s7HB s33JD s22 s1HI s29JDB s20DHIJ s13HJDAI s28 s25DBJ s3AEIHJD s19JADHI Results - Part 1 Red = Average Strategy Shaded =Least Misery Strategy

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1234567 s5FEAIJDH s7HB s33JD s22 s1HI s29JDB s20DHIJ s13HJDAI s28 s25DBJ s3AEIHJD s19JADHI Results - Part 1 Red = Average Strategy Shaded =Least Misery Strategy Blue dotted = Average Without Misery for Some

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s4EFAIHJD s23JH s24B s26JHID s16HIJ s6HJDBI s8G s10AI s12ID s2 s30DAIJ s15JHDAI s27IAJHG s11AFIHJ s21HDBJ Results - Part 2 Red = Average Strategy Dotted = Average Without Misery

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s4EFAIHJD s23JH s24B s26JHID s16HIJ s6HJDBI s8G s10AI s12ID s2 s30DAIJ s15JHDAI s27IAJHG s11AFIHJ s21HDBJ Results - Part 2 Red = Average Strategy Blue = Average With Weights Dotted = Average Without Misery (blue: for Some)

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1234567 s14AEIFHJD s31FIB s32DJ s35JHD s36DFIJ s17FEIHJD s18HJDI s34IJFH? Results - Part 3

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1234567 s14AEIFHJD s31FIB s32DJ s35JHD s36DFIJ s17FEIHJD s18HJDI s34IJFH? Results - Part 3 Yellow shading = Least Misery for Important Criteria

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Conclusions Similarity between multiple criteria and multiple people Main issue is inequality in importance Adapted strategies help to explain a bit But more work needed

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