Topic of this talk Topic of this talk From E- -Relevance Relevance From E to W- -Relevance Relevance to W � What is relevance in Mobile Personal Information Retrieval? P. Coppola, V. Della Mea, L. Di Gaspero, S. Mizzaro – What is Mobile Personal Information Retrieval? � Not just Mobile Information Retrieval… Dept. of Mathematics and Computer Science University of Udine – Mobile devices (cell phones, PDAs, …) http://www.dimi.uniud.it/~{coppola,dellamea,digasper,mizzaro} � … but Ubiquitous/Pervasive Information {coppola,dellamea,digasper,mizzaro}@dimi.uniud.it Retrieval Workshop on Mobile Personal Information Retrieval – Ubiquitous devices accessing/providing information SIGIR 2002 – Tampere – 15/8/2002 – Strongly interconnected with the real, physical world 2 S. Mizzaro et al. - From E-Relevance to W-Relevance Warnings! Warnings! Outline Outline � 1 st part: Relevance in classical IR (my MIR previous work) IR UIR � 2 nd part: Relevance in mobile IR � Preliminary work (what/how is different) � Extremely speculative talk � 3rd part: Scenarios (examples to support – 10 years future our view) – Avoid ephemeral technological constraints � Conclusions – In 10 years or so, mobile devices and desktop computers might be rather similar � Brainstorming S. Mizzaro et al. - From E-Relevance to W-Relevance 3 S. Mizzaro et al. - From E-Relevance to W-Relevance 4 The relevance pot The relevance pot Many relevances Many relevances � Relevance � Topicality � Classification along 4 dimensions: user satisfaction user satisfaction � Pertinence – Information resources � Utility – User problem representations usefulness usefulness � … – Time topicality topicality s s system relevance system relevance i i t t u u a a t t e e i i o o c c n n n n user relevance a a – Components user relevance l a a l r r v v e e pertinence pertinence l e utility l e e e utility v l v e l a a e r n n r c c e e 5 6 S. Mizzaro et al. - From E-Relevance to W-Relevance S. Mizzaro et al. - From E-Relevance to W-Relevance
Information resources User problem representations Information resources User problem representations Real Information Information Need Perceived Information Need Document Expressed Information Need Formalized Surrogate Information Need 7 8 S. Mizzaro et al. - From E-Relevance to W-Relevance S. Mizzaro et al. - From E-Relevance to W-Relevance The relevance of “X” to “Y” The relevance of “X” to “Y” More ordered… More ordered… Info resources RIN I I PIN D D EIN S FIN S User The relevance of the information to the information need The relevance of the document to the request The relevance of the document to the query FIN EIN PIN RIN pbm. S. Mizzaro et al. - From E-Relevance to W-Relevance 9 S. Mizzaro et al. - From E-Relevance to W-Relevance 10 Time Time Topicality? Topicality? � Even more relevances: � Not mentioned yet… – The relevance of X to Y at query � …we need another dimension expression time � Components: – The relevance of X to Y at the time of the – Topic end of interaction with the IR system � What the document/need is about – … – Task � What the user has to do with the retrieved info – Context (… everything else!) � Everything else (previous knowledge, …) 11 12 S. Mizzaro et al. - From E-Relevance to W-Relevance S. Mizzaro et al. - From E-Relevance to W-Relevance
So, many relevances Summary So, many relevances Summary � 1 st part: Relevance in classical IR (my � The relevance of the surrogate to the query at query expression time for previous work) what concerns the topic only ⇒ There are many relevances ⇐ � The relevance of the received � 2 nd part: Relevance in mobile IR information to the real information need at the end of the interaction with the IR system for what concerns topic, task, and context � Beyond-topical relevance criteria 13 14 S. Mizzaro et al. - From E-Relevance to W-Relevance S. Mizzaro et al. - From E-Relevance to W-Relevance Mobile/wireless/ubiquitous/… Mobile/wireless/ubiquitous/… Stronger link with the physical world Stronger link with the physical world � In the mobile case, users seek information Listen, you’re NOT Thing because they want something… Thing need going to say that there � … erm, some thing are even more Real Information relevances, are you?? Information Need Perceived Information Need Document Expressed Information Need Formalized Surrogate Information Need S. Mizzaro et al. - From E-Relevance to W-Relevance 15 S. Mizzaro et al. - From E-Relevance to W-Relevance 16 Link with the physical world: Time Link with the physical world: Time Components: Task and context Components: Task and context � Users need “quick and dirty” information � Task & Context are not only inside � Carpe diem! user’s mind… – Things change (faster?) � …they are also about the real world: – Replication is difficult – Location, direction, speed, … – What is relevant now will not be relevant later – Noise, light, … � “Precision is more important than recall” – What I’m doing while seeking info � The DB is mobile vs. my device is mobile (concentration/attention level, …) � Beyond-topical relevance criteria: more important 17 18 S. Mizzaro et al. - From E-Relevance to W-Relevance S. Mizzaro et al. - From E-Relevance to W-Relevance
Summary Scenario 1: Catching the train Summary Scenario 1: Catching the train � …In a taxi, arriving at the railway station in a hurry… � Physical world is more important � I don’t want that @#%$§ long list of connections!!! � Thing & thing need: more relevances � Just give me a seat on the first train to Milano. And book/buy it!! � Time: is more important � Automatic query generation (IR, not IF!) � Beyond-topical relevance criteria are more important (i.e., topicality only? Forget it!) � 3 rd part: scenarios 19 20 S. Mizzaro et al. - From E-Relevance to W-Relevance S. Mizzaro et al. - From E-Relevance to W-Relevance Scenario 2: Driving to SIGIR 2012 Scenario 2: Driving to SIGIR 2012 Scenario 1: Catching the train Scenario 1: Catching the train Suggested route � Topic (in part from the real world): trains from Udine to Milano � Task & context (from the real world) Traffic jam Location enabled PDA – In a hurry (taxi speed…) (GPS, …) – Time of the day – My wife is with me. Does she need a ticket too? – The first train on the timetable is fully booked – My credit card details might be available (erm…) – … S. Mizzaro et al. - From E-Relevance to W-Relevance 21 S. Mizzaro et al. - From E-Relevance to W-Relevance 22 Scenario 2: Driving to SIGIR 2012 Scenario 2: Driving to SIGIR 2012 Scenario 2: Driving to SIGIR 2012 Scenario 2: Driving to SIGIR 2012 She’s going to Tampere! It’s Mary: my friend And now??? 23 24 S. Mizzaro et al. - From E-Relevance to W-Relevance S. Mizzaro et al. - From E-Relevance to W-Relevance
Scenario 2: Driving to SIGIR 2012 Scenario 2: Driving to SIGIR 2012 Scenario 2: Driving to SIGIR 2012 Scenario 2: Driving to SIGIR 2012 Sure! Let’s stop in Seinäjoki 25 26 S. Mizzaro et al. - From E-Relevance to W-Relevance S. Mizzaro et al. - From E-Relevance to W-Relevance Scenario 2: Driving to SIGIR 2012 Scenario 2: Driving to SIGIR 2012 Scenario 2: Driving to SIGIR 2012 Scenario 2: Driving to SIGIR 2012 � Topic: – Tampere, Helsinki, trip, route, … � Task: – Driving to Tampere, conveniently � Context: – A friend of mine (address book, agenda,…) – Not a good driver at all, very old car (world) S. Mizzaro et al. - From E-Relevance to W-Relevance 27 S. Mizzaro et al. - From E-Relevance to W-Relevance 28 Scenario 3: E Scenario 3: E- -Commerce Commerce Scenario 3: E- Scenario 3: E -Commerce Commerce � Trendy girl in a commercial center looking for a new Mosquito T-shirt � You submit a query to shops database � You do not want – E-Bay catalogues – A full description of Mosquito t-shirt � You do want: – Price, availability of size (label on my dress) – Do I have enough time? (position, speed,…) – See/try/book/buy it now! 29 30 S. Mizzaro et al. - From E-Relevance to W-Relevance S. Mizzaro et al. - From E-Relevance to W-Relevance
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