Using collaborative filtering to weave an information tapestry
Communications of the ACM - Special issue on information filtering
GroupLens: an open architecture for collaborative filtering of netnews
CSCW '94 Proceedings of the 1994 ACM conference on Computer supported cooperative work
Pointing the way: active collaborative filtering
CHI '95 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Social information filtering: algorithms for automating “word of mouth”
CHI '95 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Communications of the ACM
GroupLens: applying collaborative filtering to Usenet news
Communications of the ACM
Probabilistic latent semantic indexing
Proceedings of the 22nd annual international ACM SIGIR conference on Research and development in information retrieval
A similarity-based probability model for latent semantic indexing
Proceedings of the 22nd annual international ACM SIGIR conference on Research and development in information retrieval
An algorithmic framework for performing collaborative filtering
Proceedings of the 22nd annual international ACM SIGIR conference on Research and development in information retrieval
Jester 2.0 (poster abstract): evaluation of an new linear time collaborative filtering algorithm
Proceedings of the 22nd annual international ACM SIGIR conference on Research and development in information retrieval
CSCW '96 Proceedings of the 1996 ACM conference on Computer supported cooperative work
Explaining collaborative filtering recommendations
CSCW '00 Proceedings of the 2000 ACM conference on Computer supported cooperative work
Learning Collaborative Information Filters
ICML '98 Proceedings of the Fifteenth International Conference on Machine Learning
Collaborative Filtering by Personality Diagnosis: A Hybrid Memory and Model-Based Approach
UAI '00 Proceedings of the 16th Conference on Uncertainty in Artificial Intelligence
The Effects of Singular Value Decomposition on Collaborative Filtering
The Effects of Singular Value Decomposition on Collaborative Filtering
Getting to know you: learning new user preferences in recommender systems
Proceedings of the 7th international conference on Intelligent user interfaces
On the recommending of citations for research papers
CSCW '02 Proceedings of the 2002 ACM conference on Computer supported cooperative work
Amazon.com Recommendations: Item-to-Item Collaborative Filtering
IEEE Internet Computing
Is seeing believing?: how recommender system interfaces affect users' opinions
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
RecTree: An Efficient Collaborative Filtering Method
DaWaK '01 Proceedings of the Third International Conference on Data Warehousing and Knowledge Discovery
Probabilistic Memory-Based Collaborative Filtering
IEEE Transactions on Knowledge and Data Engineering
Improving the Quality of the Personalized Electronic Program Guide
User Modeling and User-Adapted Interaction
Evaluating collaborative filtering recommender systems
ACM Transactions on Information Systems (TOIS)
Latent semantic models for collaborative filtering
ACM Transactions on Information Systems (TOIS)
ACM Transactions on Information Systems (TOIS)
A graph model for E-commerce recommender systems
Journal of the American Society for Information Science and Technology
Shilling recommender systems for fun and profit
Proceedings of the 13th international conference on World Wide Web
Applying Collaborative Filtering for Efficient Document Search
WI '04 Proceedings of the 2004 IEEE/WIC/ACM International Conference on Web Intelligence
Taxonomy-driven computation of product recommendations
Proceedings of the thirteenth ACM international conference on Information and knowledge management
SERF: integrating human recommendations with search
Proceedings of the thirteenth ACM international conference on Information and knowledge management
Scale and Translation Invariant Collaborative Filtering Systems
Information Retrieval
Collaborative Filtering Using a Regression-Based Approach
Knowledge and Information Systems
Incorporating contextual information in recommender systems using a multidimensional approach
ACM Transactions on Information Systems (TOIS)
IEEE Transactions on Knowledge and Data Engineering
Adaptive recommendation: putting the best foot forward
ISICT '04 Proceedings of the 2004 international symposium on Information and communication technologies
Scalable collaborative filtering using cluster-based smoothing
Proceedings of the 28th annual international ACM SIGIR conference on Research and development in information retrieval
Social matching: A framework and research agenda
ACM Transactions on Computer-Human Interaction (TOCHI)
Naive Bayes models for probability estimation
ICML '05 Proceedings of the 22nd international conference on Machine learning
Neural Networks - 2004 Special issue: New developments in self-organizing systems
User evaluation of Físchlár-News: An automatic broadcast news delivery system
ACM Transactions on Information Systems (TOIS)
Tell me who I am: an interactive recommendation system
Proceedings of the eighteenth annual ACM symposium on Parallelism in algorithms and architectures
Unifying user-based and item-based collaborative filtering approaches by similarity fusion
SIGIR '06 Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval
Analysis of a low-dimensional linear model under recommendation attacks
SIGIR '06 Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval
Tensor-CUR decompositions for tensor-based data
Proceedings of the 12th ACM SIGKDD international conference on Knowledge discovery and data mining
Naïve filterbots for robust cold-start recommendations
Proceedings of the 12th ACM SIGKDD international conference on Knowledge discovery and data mining
Supporting Context-Aware Media Recommendations for Smart Phones
IEEE Pervasive Computing
Trust-based agent community for collaborative recommendation
AAMAS '06 Proceedings of the fifth international joint conference on Autonomous agents and multiagent systems
Don't look stupid: avoiding pitfalls when recommending research papers
CSCW '06 Proceedings of the 2006 20th anniversary conference on Computer supported cooperative work
Click data as implicit relevance feedback in web search
Information Processing and Management: an International Journal
Using SVD and demographic data for the enhancement of generalized Collaborative Filtering
Information Sciences: an International Journal
Reverse Nearest Neighbors Search in Ad Hoc Subspaces
IEEE Transactions on Knowledge and Data Engineering
Common structure and properties of filtering systems
Electronic Commerce Research and Applications
Modeling relationships at multiple scales to improve accuracy of large recommender systems
Proceedings of the 13th ACM SIGKDD international conference on Knowledge discovery and data mining
Proceedings of the 13th ACM SIGKDD international conference on Knowledge discovery and data mining
Applying collaborative filtering techniques to movie search for better ranking and browsing
Proceedings of the 13th ACM SIGKDD international conference on Knowledge discovery and data mining
Selectively acquiring ratings for product recommendation
Proceedings of the ninth international conference on Electronic commerce
REFEREE: an open framework for practical testing of recommender systems using ResearchIndex
VLDB '02 Proceedings of the 28th international conference on Very Large Data Bases
ACM Transactions on Information Systems (TOIS)
Eigentaste 5.0: constant-time adaptability in a recommender system using item clustering
Proceedings of the 2007 ACM conference on Recommender systems
Collaborative recommender systems: Combining effectiveness and efficiency
Expert Systems with Applications: An International Journal
Applications of wavelet data reduction in a recommender system
Expert Systems with Applications: An International Journal
A novel collaborative filtering approach for recommending ranked items
Expert Systems with Applications: An International Journal
Unified relevance models for rating prediction in collaborative filtering
ACM Transactions on Information Systems (TOIS)
Mediation of user models for enhanced personalization in recommender systems
User Modeling and User-Adapted Interaction
Evaluation of recommender systems: A new approach
Expert Systems with Applications: An International Journal
Protection and retrieval of encrypted multimedia content: when cryptography meets signal processing
EURASIP Journal on Information Security
EigenRank: a ranking-oriented approach to collaborative filtering
Proceedings of the 31st annual international ACM SIGIR conference on Research and development in information retrieval
Interpretable nonnegative matrix decompositions
Proceedings of the 14th ACM SIGKDD international conference on Knowledge discovery and data mining
Comparing State-of-the-Art Collaborative Filtering Systems
MLDM '07 Proceedings of the 5th international conference on Machine Learning and Data Mining in Pattern Recognition
The Multidisciplinary Facets of Research on Humour
WILF '07 Proceedings of the 7th international workshop on Fuzzy Logic and Applications: Applications of Fuzzy Sets Theory
Solution Architecture for Visitor Segmentation and Recommendation Generation in Real Time
EC-Web '08 Proceedings of the 9th international conference on E-Commerce and Web Technologies
Identifying the effects of SVD and demographic data use on generalized collaborative filtering
International Journal of Computer Mathematics
A random walk method for alleviating the sparsity problem in collaborative filtering
Proceedings of the 2008 ACM conference on Recommender systems
Three recommender approaches to interface controls reduction
Proceedings of the 2008 ACM conference on Recommender systems
Navigation support for learners in informal learning environments
Proceedings of the 2008 ACM conference on Recommender systems
Joke retrieval: recognizing the same joke told differently
Proceedings of the 17th ACM conference on Information and knowledge management
On exploiting classification taxonomies in recommender systems
AI Communications - Recommender Systems
User language model for collaborative personalized search
ACM Transactions on Information Systems (TOIS)
Two-way cooperative prediction for collaborative filtering recommendations
Expert Systems with Applications: An International Journal
Case-studies on exploiting explicit customer requirements in recommender systems
User Modeling and User-Adapted Interaction
A collaborative filtering method based on artificial immune network
Expert Systems with Applications: An International Journal
An efficient algorithm for learning to rank from preference graphs
Machine Learning
Capturing truthiness: mining truth tables in binary datasets
Proceedings of the 2009 ACM symposium on Applied Computing
Collaborative filtering using orthogonal nonnegative matrix tri-factorization
Information Processing and Management: an International Journal
ECIR '09 Proceedings of the 31th European Conference on IR Research on Advances in Information Retrieval
Learning spectral graph transformations for link prediction
ICML '09 Proceedings of the 26th Annual International Conference on Machine Learning
CARES: a ranking-oriented CADAL recommender system
Proceedings of the 9th ACM/IEEE-CS joint conference on Digital libraries
Context Dependent Movie Recommendations Using a Hierarchical Bayesian Model
Canadian AI '09 Proceedings of the 22nd Canadian Conference on Artificial Intelligence: Advances in Artificial Intelligence
Application of Item Response Theory to Collaborative Filtering
ISNN '09 Proceedings of the 6th International Symposium on Neural Networks on Advances in Neural Networks
Web-Based Recommender Systems and User Needs --the Comprehensive View
Proceedings of the 2008 conference on New Trends in Multimedia and Network Information Systems
Finding similar users in social networks: extended abstract
Proceedings of the twenty-first annual symposium on Parallelism in algorithms and architectures
Mixed collaborative and content-based filtering with user-contributed semantic features
AAAI'06 proceedings of the 21st national conference on Artificial intelligence - Volume 2
Lessons on applying automated recommender systems to information-seeking tasks
AAAI'06 proceedings of the 21st national conference on Artificial intelligence - Volume 2
ItemRank: a random-walk based scoring algorithm for recommender engines
IJCAI'07 Proceedings of the 20th international joint conference on Artifical intelligence
MUADDIB: A distributed recommender system supporting device adaptivity
ACM Transactions on Information Systems (TOIS)
Time-Dependent Models in Collaborative Filtering Based Recommender System
WI-IAT '09 Proceedings of the 2009 IEEE/WIC/ACM International Joint Conference on Web Intelligence and Intelligent Agent Technology - Volume 01
Pairwise preference regression for cold-start recommendation
Proceedings of the third ACM conference on Recommender systems
Donation dashboard: a recommender system for donation portfolios
Proceedings of the third ACM conference on Recommender systems
Msuggest: a semantic recommender framework for traditional chinese medicine book search engine
Proceedings of the 18th ACM conference on Information and knowledge management
Probabilistic latent preference analysis for collaborative filtering
Proceedings of the 18th ACM conference on Information and knowledge management
Collaborative filtering using random neighbours in peer-to-peer networks
Proceedings of the 1st ACM international workshop on Complex networks meet information & knowledge management
Predicting Neighbor Goodness in Collaborative Filtering
FQAS '09 Proceedings of the 8th International Conference on Flexible Query Answering Systems
Classification-based collaborative filtering using market basket data
Expert Systems with Applications: An International Journal
Collaborative filtering based on iterative principal component analysis
Expert Systems with Applications: An International Journal
Predicting Missing Ratings in Recommender Systems: Adapted Factorization Approach
International Journal of Electronic Commerce
A survey of collaborative filtering techniques
Advances in Artificial Intelligence
Opinion space: a scalable tool for browsing online comments
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Towards publishing recommendation data with predictive anonymization
ASIACCS '10 Proceedings of the 5th ACM Symposium on Information, Computer and Communications Security
An empirical study of data smoothing methods for memory-based and hybrid collaborative filtering
PRICAI'06 Proceedings of the 9th Pacific Rim international conference on Artificial intelligence
Data mining for web personalization
The adaptive web
Collaborative filtering recommender systems
The adaptive web
New theoretical findings in multiple personalized recommendations
Proceedings of the 2010 ACM Symposium on Applied Computing
Privacy-preserving eigentaste-based collaborative filtering
IWSEC'07 Proceedings of the Security 2nd international conference on Advances in information and computer security
A random-walk based scoring algorithm applied to recommender engines
WebKDD'06 Proceedings of the 8th Knowledge discovery on the web international conference on Advances in web mining and web usage analysis
Towards a scalable kNN CF algorithm: exploring effective applications of clustering
WebKDD'06 Proceedings of the 8th Knowledge discovery on the web international conference on Advances in web mining and web usage analysis
A recommendation using item quality
KES-AMSTA'08 Proceedings of the 2nd KES International conference on Agent and multi-agent systems: technologies and applications
Low-rank matrix completion with noisy observations: a quantitative comparison
Allerton'09 Proceedings of the 47th annual Allerton conference on Communication, control, and computing
Correlated non-parametric latent feature models
UAI '09 Proceedings of the Twenty-Fifth Conference on Uncertainty in Artificial Intelligence
Collaborative filtering based on an iterative prediction method to alleviate the sparsity problem
Proceedings of the 11th International Conference on Information Integration and Web-based Applications & Services
A new collaborative filtering metric that improves the behavior of recommender systems
Knowledge-Based Systems
A hybrid collaborative filtering recommendation mechanism for P2P networks
Future Generation Computer Systems
The task-dependent effect of tags and ratings on social media access
ACM Transactions on Information Systems (TOIS)
Information Sciences: an International Journal
Projected Landweber iteration for matrix completion
Journal of Computational and Applied Mathematics
Context-based services selection and recommendation through P-learning platform
ITHET'10 Proceedings of the 9th international conference on Information technology based higher education and training
Three challenges in data mining
Frontiers of Computer Science in China
The effect of sparsity on collaborative filtering metrics
ADC '09 Proceedings of the Twentieth Australasian Conference on Australasian Database - Volume 92
Online evolutionary collaborative filtering
Proceedings of the fourth ACM conference on Recommender systems
Automatically building research reading lists
Proceedings of the fourth ACM conference on Recommender systems
A belief propagation based recommender system for online services
Proceedings of the fourth ACM conference on Recommender systems
Adapting neighborhood and matrix factorization models for context aware recommendation
Proceedings of the Workshop on Context-Aware Movie Recommendation
Network growth and the spectral evolution model
CIKM '10 Proceedings of the 19th ACM international conference on Information and knowledge management
The link prediction problem in bipartite networks
IPMU'10 Proceedings of the Computational intelligence for knowledge-based systems design, and 13th international conference on Information processing and management of uncertainty
A novel approach to compute similarities and its application to item recommendation
PRICAI'10 Proceedings of the 11th Pacific Rim international conference on Trends in artificial intelligence
Collaborative filtering through SVD-based and hierarchical nonlinear PCA
ICANN'10 Proceedings of the 20th international conference on Artificial neural networks: Part I
Improving the scalability of recommender systems by clustering using genetic algorithms
ICANN'10 Proceedings of the 20th international conference on Artificial neural networks: Part I
Overlay management for fully distributed user-based collaborative filtering
EuroPar'10 Proceedings of the 16th international Euro-Par conference on Parallel processing: Part I
Context-aware recommendation using rough set model and collaborative filtering
Artificial Intelligence Review
A proposal for news recommendation based on clustering techniques
IEA/AIE'10 Proceedings of the 23rd international conference on Industrial engineering and other applications of applied intelligent systems - Volume Part III
An Exponential Model for Infinite Rankings
The Journal of Machine Learning Research
A method of extracting malicious expressions in bulletin board systems by using context analysis
Information Processing and Management: an International Journal
Recommender systems with non-binary grades
Proceedings of the twenty-third annual ACM symposium on Parallelism in algorithms and architectures
Recommender system based on click stream data using association rule mining
Expert Systems with Applications: An International Journal
Privacy preserving protocols for eigenvector computation
PSDML'10 Proceedings of the international ECML/PKDD conference on Privacy and security issues in data mining and machine learning
Functional matrix factorizations for cold-start recommendation
Proceedings of the 34th international ACM SIGIR conference on Research and development in Information Retrieval
The impact of rating scales on user's rating behavior
UMAP'11 Proceedings of the 19th international conference on User modeling, adaption, and personalization
ICCS'11 Proceedings of the 19th international conference on Conceptual structures for discovering knowledge
Trust based recommender system using ant colony for trust computation
Expert Systems with Applications: An International Journal
Enhancing collaborative filtering systems with personality information
Proceedings of the fifth ACM conference on Recommender systems
Anchoring effects of recommender systems
Proceedings of the fifth ACM conference on Recommender systems
Collaborative filtering based on significances
Information Sciences: an International Journal
Expert Systems with Applications: An International Journal
Creative storytelling enhanced through social media and intelligent recommendation
C&C '11 Proceedings of the 8th ACM conference on Creativity and cognition
What is a "Musical World"? An affinity propagation approach
MIRUM '11 Proceedings of the 1st international ACM workshop on Music information retrieval with user-centered and multimodal strategies
Peer-based relay scheme of collaborative filtering for research literature
OTM'11 Proceedings of the 2011th Confederated international conference on On the move to meaningful internet systems - Volume Part I
Extended precision quality measure for recommender systems
CAEPIA'11 Proceedings of the 14th international conference on Advances in artificial intelligence: spanish association for artificial intelligence
Exploiting rating behaviors for effective collaborative filtering
WISE'06 Proceedings of the 7th international conference on Web Information Systems
A continuous weighted low-rank approximation for collaborative filtering problems
ICAPR'05 Proceedings of the Third international conference on Advances in Pattern Recognition - Volume Part I
Group-aware prediction with exponential smoothing for collaborative filtering
Proceedings of the 2nd Challenge on Context-Aware Movie Recommendation
Active collaborative filtering
UAI'03 Proceedings of the Nineteenth conference on Uncertainty in Artificial Intelligence
Using quantitative association rules in collaborative filtering
WAIM'05 Proceedings of the 6th international conference on Advances in Web-Age Information Management
A strategy-oriented operation module for recommender systems in E-commerce
Computers and Operations Research
Arbitrarily distributed data-based recommendations with privacy
Data & Knowledge Engineering
The impact of data obfuscation on the accuracy of collaborative filtering
Expert Systems with Applications: An International Journal
A careful assessment of recommendation algorithms related to dimension reduction techniques
Knowledge-Based Systems
A performance prediction approach to enhance collaborative filtering performance
ECIR'2010 Proceedings of the 32nd European conference on Advances in Information Retrieval
Collaborative Filtering with a User-Item Matrix Reduction Technique
International Journal of Electronic Commerce
Intelligent techniques for web personalization
ITWP'03 Proceedings of the 2003 international conference on Intelligent Techniques for Web Personalization
Impact of data characteristics on recommender systems performance
ACM Transactions on Management Information Systems (TMIS)
Entertainment personalization mechanism through cross-domain user modeling
INTETAIN'05 Proceedings of the First international conference on Intelligent Technologies for Interactive Entertainment
Alleviating the sparsity problem of collaborative filtering using trust inferences
iTrust'05 Proceedings of the Third international conference on Trust Management
Collaborative filtering CAPTCHAs
HIP'05 Proceedings of the Second international conference on Human Interactive Proofs
Data sparsity issues in the collaborative filtering framework
WebKDD'05 Proceedings of the 7th international conference on Knowledge Discovery on the Web: advances in Web Mining and Web Usage Analysis
A latent model for collaborative filtering
International Journal of Approximate Reasoning
Personal-Hosting RESTful web services for social network based recommendation
ICSOC'11 Proceedings of the 9th international conference on Service-Oriented Computing
Collaborative Filtering Recommender Systems
Foundations and Trends in Human-Computer Interaction
Collaborative filtering via group-structured dictionary learning
LVA/ICA'12 Proceedings of the 10th international conference on Latent Variable Analysis and Signal Separation
Improved collaborative filtering
ISAAC'11 Proceedings of the 22nd international conference on Algorithms and Computation
Efficient Protocols for Principal Eigenvector Computation over Private Data
Transactions on Data Privacy
Optimal social choice functions: a utilitarian view
Proceedings of the 13th ACM Conference on Electronic Commerce
Expert Systems with Applications: An International Journal
Privacy-preserving SOM-based recommendations on horizontally distributed data
Knowledge-Based Systems
An adaptive approach to dealing with unstable behaviour of users in collaborative filtering systems
Journal of Information Science
A framework for collaborative filtering recommender systems
Expert Systems with Applications: An International Journal
GetJar mobile application recommendations with very sparse datasets
Proceedings of the 18th ACM SIGKDD international conference on Knowledge discovery and data mining
RecMax: exploiting recommender systems for fun and profit
Proceedings of the 18th ACM SIGKDD international conference on Knowledge discovery and data mining
Increasing temporal diversity with purchase intervals
SIGIR '12 Proceedings of the 35th international ACM SIGIR conference on Research and development in information retrieval
Electronic Commerce Research and Applications
TasteWeights: a visual interactive hybrid recommender system
Proceedings of the sixth ACM conference on Recommender systems
Proceedings of the sixth ACM conference on Recommender systems
e-learning recommender system for learners in online social networks through association retrieval
Proceedings of the CUBE International Information Technology Conference
Stability of Recommendation Algorithms
ACM Transactions on Information Systems (TOIS)
An improved recommender based on hidden Markov model
PRICAI'12 Proceedings of the 12th Pacific Rim international conference on Trends in Artificial Intelligence
Pools, clubs and security: designing for a party not a person
Proceedings of the 2012 workshop on New security paradigms
Smallworlds: visualizing social recommendations
EuroVis'10 Proceedings of the 12th Eurographics / IEEE - VGTC conference on Visualization
Predicting missing values with biclustering: A coherence-based approach
Pattern Recognition
Application of recommendation system: an empirical study of the mobile reading platform
ISMIS'12 Proceedings of the 20th international conference on Foundations of Intelligent Systems
Combining user preferences and user opinions for accurate recommendation
Electronic Commerce Research and Applications
A comparative study of dimensionality reduction techniques to enhance trace clustering performances
Expert Systems with Applications: An International Journal
LinkedVis: exploring social and semantic career recommendations
Proceedings of the 2013 international conference on Intelligent user interfaces
Integrating social information into collaborative filtering for celebrities recommendation
ACIIDS'13 Proceedings of the 5th Asian conference on Intelligent Information and Database Systems - Volume Part II
Transfer learning in heterogeneous collaborative filtering domains
Artificial Intelligence
Enhancing Academic Event Participation with Context-aware and Social Recommendations
ASONAM '12 Proceedings of the 2012 International Conference on Advances in Social Networks Analysis and Mining (ASONAM 2012)
Mining large streams of user data for personalized recommendations
ACM SIGKDD Explorations Newsletter
Knowledge-Based Systems
Shortlisting top-K assignments
Proceedings of the 25th International Conference on Scientific and Statistical Database Management
Trust based recommendation systems
Proceedings of the 2013 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining
Learning output kernels for multi-task problems
Neurocomputing
Learning to rank recommendations with the k-order statistic loss
Proceedings of the 7th ACM conference on Recommender systems
Generating supplemental content information using virtual profiles
Proceedings of the 7th ACM conference on Recommender systems
Exploiting two-faceted web of trust for enhanced-quality recommendations
Expert Systems with Applications: An International Journal
Proceedings of the 2013 International News Recommender Systems Workshop and Challenge
Collaborative filtering based on rating psychology
WAIM'13 Proceedings of the 14th international conference on Web-Age Information Management
A scalable approach to column-based low-rank matrix approximation
IJCAI'13 Proceedings of the Twenty-Third international joint conference on Artificial Intelligence
A new user similarity model to improve the accuracy of collaborative filtering
Knowledge-Based Systems
Internal link prediction: A new approach for predicting links in bipartite graphs
Intelligent Data Analysis - Dynamic Networks and Knowledge Discovery
Hi-index | 0.02 |
Eigentaste is a collaborative filtering algorithm that uses iuniversal queries to elicit real-valued user ratings on a common set of items and applies principal component analysis (PCA) to the resulting dense subset of the ratings matrix. PCA facilitates dimensionality reduction for offline clustering of users and rapid computation of recommendations. For a database of in users, standard nearest-neighbor techniques require iO(in) processing time to compute recommendations, whereas Eigentaste requires iO(1) (constant) time. We compare Eigentaste to alternative algorithms using data from iJester, an online joke recommending system.Jester has collected approximately 2,500,000 ratings from 57,000 users. We use the Normalized Mean Absolute Error (NMAE) measure to compare performance of different algorithms. In the Appendix we use Uniform and Normal distribution models to derive analytic estimates of NMAE when predictions are random. On the Jester dataset, Eigentaste computes recommendations two orders of magnitude faster with no loss of accuracy. Jester is online at: http://eigentaste.berkeley.edu