234 citations
- Universität HamburgDE106 papers
- Freie Universität BerlinDE31 papers
- Technische Universität DresdenDE16 papers
- Centre National de la Recherche ScientifiqueFR11 papers
- Deutsches Elektronen-Synchrotron DESYDE9 papers
- Hamburg University of TechnologyDE8 papers
- University of BolognaIT8 papers
- Hamburg Institut (Germany)DE6 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT6 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di NapoliIT6 papers
- Middle East Technical UniversityTR6 papers
- AIT Austrian Institute of Technology GmbHAT5 papers
7 papers · 2 filters
The relationship between internet user type and user performance when carrying out simple vs. complex search tasks
Georg Singer, Pille Pruulmann-Vengerfeldt, Ulrich Norbisrath +1
It is widely known that people become better at an activity if they perform this activity long and often. Yet, the question is whether being active in related areas like communicat…
A Framework for Evaluating the Retrieval Effectiveness of Search Engines
Dirk Lewandowski
This chapter presents a theoretical framework for evaluating next generation search engines. We focus on search engines whose results presentation is enriched with additional infor…
The retrieval effectiveness of search engines on navigational queries
Dirk Lewandowski
Purpose - To test major Web search engines on their performance on navigational queries, i.e. searches for homepages. Design/methodology/approach - 100 real user queries are posed…
The Influence of Commercial Intent of Search Results on Their Perceived Relevance
Dirk Lewandowski
We carried out a retrieval effectiveness test on the three major web search engines (i.e., Google, Microsoft and Yahoo). In addition to relevance judgments, we classified the resul…
What Users See - Structures in Search Engine Results Pages
Nadine Hoechstoetter, Dirk Lewandowski
This paper investigates the composition of search engine results pages. We define what elements the most popular web search engines use on their results pages (e.g., organic result…
The Retrieval Effectiveness of Web Search Engines: Considering Results Descriptions
Dirk Lewandowski
Purpose: To compare five major Web search engines (Google, Yahoo, MSN, Ask.com, and Seekport) for their retrieval effectiveness, taking into account not only the results but also t…