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Selecting news to suit a group of criteria: an exploration. Judith Masthoff University of Brighton. Average Strategy. Use average of the individual ratings. Group list: (E, F) H (D, J) A I B G C. Least Misery Strategy. Use minimum of the individual ratings.
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Selecting news to suit a group of criteria: an exploration Judith Masthoff University of Brighton
Average Strategy Use average of the individual ratings Group list: (E, F) H (D, J) A I B G C
Least Misery Strategy Use minimum of the individual ratings Group list: F E (H, J, D) G B I C A
Average Without Misery Strategy Use average of the individual ratings, excluding items below threshold (say 4) Group list: (E, F) H (D, J) B G
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
Criteria used • Importance of the news in general • Relevance of the location to you • Recency of the news
Criteria used • Importance of the news in general • Relevance of the location to you • Recency of the news
Results - Part 1 Red = Average Strategy
Results - Part 1 Red = Average Strategy Shaded =Least Misery Strategy
Results - Part 2 Red = Average Strategy
Results - Part 2 Red = Average Strategy Red dotted = Average Without Misery Strategy
Introduction of A and I A (10, 1, 10) I (10, 3, 7) Grey = This experiment Black = Old experiment
Average Strategy Use average of the individual ratings Group list: (E, F) H (D, J) A I B G C
Average over Important Criteria Use average of the individual ratings Group list: A E (F, I) (H, J) D G B C
Least Misery Strategy Use minimum of the individual ratings Group list: F E (H, J, D) G B I C A
Least Misery For Important Criteria Use minimum of the individual ratings Group list: A F E I (H, J, D) G B C
Average Strategy Use average of the individual ratings Group list: (E, F) H (D, J) A I B G C
Average Strategy with Weights Use average of the individual ratings 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)
Average Without Misery Strategy Use average of the individual ratings, excluding items below threshold (say 6) Group list: (E, F) H (D, J)
Average Without Misery for Some Use average of the individual ratings, excluding items below threshold (say 6) Group list: (E, F) H (D, J) A I (threshold 6) (E, F) A I (threshold 7)
Results - Part 1 Red = Average Strategy Shaded =Least Misery Strategy
Results - Part 1 Red = Average Strategy Shaded =Least Misery Strategy Blue dotted = Average Without Miseryfor Some
Results - Part 2 Red = Average Strategy Dotted = Average Without Misery
Results - Part 2 Red = Average Strategy Blue = Average With Weights Dotted = Average Without Misery (blue: for Some)
Results - Part 3 Yellow shading = Least Misery for Important Criteria
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