Search Engine Usability Taly Sharon www. sharon-it. com taly@sharon-it. com sharont@alum. mit. edu 1 www. sharon-it. com
Agenda • Search Engines Issues • Search Engines UI Paradigms – Including Ajax, query formulation and results • Demonstration links (see www. sharon-it. com/new. html) • References 2 www. sharon-it. com
Search Engines Issues • How to phrase query? • How to interpret query? • How to present results? • Additional Problem: Web Users (see next)! 3 www. sharon-it. com
Web Users? F Make poor queries F Specific behavior – short (3. 3 terms average) – imprecise terms – sub-optimal syntax (80% without operators) – low effort – 85% look over one result screen only – 78% of queries not modified F Wide variance on – – 4 Needs Expectations Knowledge Bandwidth (and platforms) www. sharon-it. com
Search Engines UI Paradigms Simple Keywords User Control Static Textual 5 Overloaded Natural (NLP) Automatic Dynamic (Ajax) Graphical www. sharon-it. com
Simple Overloaded Google: Lean and Mean? 6 www. sharon-it. com
!Yahoo 7 www. sharon-it. com
search. Yahoo. com 8 www. sharon-it. com
Google in 1998 – looking up at Yahoo!? 9 Source: Internet archive’s Wayback machine www. archive. org www. sharon-it. com
Google Personalized 10 www. sharon-it. com
Advanced 11 www. sharon-it. com
MSN Search Builder 12 www. sharon-it. com
Search Engines UI Paradigms Simple Keywords User Control Static Textual 13 Overloaded Natural (NLP) Automatic Dynamic (Ajax) Graphical www. sharon-it. com
Keywords Natural (NLP) • Problem: How to formulate query? • Solution 1: use Refine, Google Suggest • Solution 2: use questions and answers engines - natural language processing (NLP) 14 www. sharon-it. com
Excite 15 www. sharon-it. com
Google Suggest • As you type – you get query suggestions and number of results per query. • labs. google. com/suggest 16 www. sharon-it. com
Q&A Engines (Natural Language) • General SEs Q&A: – Google – Yahoo – MSN • Q&A Engines: – Ask – Brainboost – Lexxe 17 www. sharon-it. com
Dis)Advantages) • Advantages: – quick and dirty answer. • Disadvantages: – often fail – Inaccurate • Who murdered JFK “Why the Fed Murdered JFK” (brainboost) • Who is the prime minister of Israel? Ariel Sharon (May 2006) – non-verified sources – slow 18 www. sharon-it. com
Search Engines UI Paradigms Simple Keywords User Control Static Textual 19 Overloaded Natural (NLP) Automatic Dynamic (Ajax) Graphical www. sharon-it. com
(Meta Search Engine (MSE Google · Yahoo · Ask About · Look. Smart · Overture Find. What Yahoo 20 Meta. Crawler Web Crawler Open Text Lycos Info. Seek www. sharon-it. com Inktomi Galaxy Excite
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? Vivisimo: link: Not supported 22 www. sharon-it. com
Problems of MSEs • Limited support of advanced search options. • Limited number (~10) of results from each search engine. • Sponsored results from the SEs are not highlighted. ? Does the average user know this? 23 www. sharon-it. com
Query Results • Examples of User Interface in Query Results’ pages : – Google – Clusty/Vivisimo – A 9 – Exalead – Kart. OO (see Graphical) 24 www. sharon-it. com
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Clusty 26 www. sharon-it. com
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Search Engines UI Paradigms Simple Keywords User Control Static Textual 30 Overloaded Natural (NLP) Automatic Dynamic (Ajax) Graphical www. sharon-it. com
Ajax Asynchronous Java. Script and XML 31 www. sharon-it. com
Ajax • Asynchronous Java. Script and XML • A Web 2. 0 technology • Fast (real-time) interactive page updates directly from the database • Ajax applications • Try it yourself - Google Web Toolkit (GWT) 32 www. sharon-it. com
Example Ajax Applications • • 33 Google Maps/Local (Yahoo, A 9) Housing Maps Google Suggest Windows live Yahoo! Instant Search GMail And many more. . www. sharon-it. com
Housing. Maps • Mash-up of Google maps and Craigs list rentals • Mash-up are websites that are built from pieces of other websites • http: //www. housingmaps. com/ 34 www. sharon-it. com
Ajax Pros/Cons • Pros – Interactivity! • Cons – might easily break the expected behavior of the browser's back button – difficult for a user to bookmark a particular state of the application – users might experience delay in the interface of the web application – requires users to have Java. Script (or Active. X) enabled in their browsers – a challenge for developers interested in adhering to WAI accessibility guidelines. 35 www. sharon-it. com
Yahoo! Instant • Example of slow reaction • Good implementation of “back” • instant. search. yahoo. com 36 www. sharon-it. com
Allthe. Web Live. Search • Yahoo’s Allthe. Web now has a new Livesearch feature. • It takes the Google Suggest approach a step further. • You will instantly see the results to the right side. • http: //livesearch. alltheweb. com/? ek=1 37 www. sharon-it. com
Search Engines UI Paradigms Simple Keywords User Control Static Textual 38 Overloaded Natural (NLP) Automatic Dynamic (Ajax) Graphical www. sharon-it. com
Visual/Graphical Search Engines • Kart. OO www. kart. OO. com • Touch. Graph 39 www. sharon-it. com
Examples 1. Query: “Taly Sharon” – Main webpage, www. sharon-it. com – co-authors (selker, lieberman, frank, lockerd, etc. ) – Conferences (IFLA, CHI, Sig. Graph, etc. ) – Related keywords (mostly from research/papers) – Other related: Google. Guide. com 2. Query: www. sharon-it. com (website) 40 www. sharon-it. com
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Dis)Advantages) • Advantages: – very visual, easy to detect trends. – Useful to find connections • Disadvantages: – Requires training – Easy disorientation 43 www. sharon-it. com
Demonstration Links • • • • • • 44 Google www. google. com Yahoo www. yahoo. com Yahoo Search Interface search. yahoo. com Google 1998 (from Internet Archive) http: //web. archive. org/web/19981111183552/http: //google. stanford. edu/ Yahoo Advanced search. yahoo. com/web/advanced? ei=UTF-8 Google Personalized www. google. com/ig MSN Search Builder search. msn. co. il Excite www. excite. com Google Suggest labs. google. com/suggest Ask www. ask. com Brainboost www. brainboost. com Lexxe www. lexxe. com Dogpile www. dogpile. com Vivisimo www. vivisimo. com Clusty www. clusty. com A 9 www. a 9. com Exalead www. exalead. com Google Maps maps. google. com Housing Maps www. housingmaps. com A 9 maps. a 9. com Windows live www. live. com Yahoo Instant instant. search. yahoo. com Alltheweb Livesearch livesearch. alltheweb. com/? ek=1 Kartoo www. kartoo. com www. sharon-it. com
References • Ajax – wikipedia http: //en. wikipedia. org/wiki/AJAX • http: //blogs. zdnet. com/micromarkets/index. php? p=27 • http: //yhoo. client. shareholder. com/downloads/2 006 Analyst. Day. pdf • http: //news. bbc. co. uk/2/hi/technology/4900742. stm • http: //www. dsi. uniroma 1. it/~ale//BICI/IR/Slides /bertinoro 8. pdf 45 www. sharon-it. com
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