Off-line vs. On-line Evaluation of Recommender Systems in Small E-commerce
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10416944" target="_blank" >RIV/00216208:11320/20:10416944 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1145/3372923.3404781" target="_blank" >https://doi.org/10.1145/3372923.3404781</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1145/3372923.3404781" target="_blank" >10.1145/3372923.3404781</a>
Alternative languages
Result language
angličtina
Original language name
Off-line vs. On-line Evaluation of Recommender Systems in Small E-commerce
Original language description
In this paper, we present our work towards comparing on-line and off-line evaluation metrics in the context of small e-commerce recommender systems. Recommending on small e-commerce enterprises is rather challenging due to the lower volume of interactions and low user loyalty, rarely extending beyond a single session. On the other hand, we usually have to deal with lower volumes of objects, which are easier to discover by users through various browsing/searching GUIs. The main goal of this paper is to determine applicability of off-line evaluation metrics in learning true usability of recommender systems (evaluated on-line in A/B testing). In total 800 variants of recommenders were evaluated off-line w.r.t. 18 metrics covering rating-based, ranking-based, novelty and diversity evaluation. The off-line results were afterwards compared with on-line evaluation of 12 selected recommender variants and based on the results, we tried to learn and utilize an off-line to on-line results prediction model. Off-line results shown a great variance in performance w.r.t. different metrics with the Pareto front covering 64% of the approaches. Furthermore, we observed that on-line results are considerably affected by the seniority of users. On-line metrics correlates positively with ranking-based metrics (AUC, MRR, nDCG) for novice users, while too high values of novelty had a negative impact on the on-line results for them.
Czech name
—
Czech description
—
Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)
Result continuities
Project
<a href="/en/project/GJ19-22071Y" target="_blank" >GJ19-22071Y: Flexible models for known-item search in large video collections</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of the 31st ACM Conference on Hypertext and Social Media
ISBN
978-1-4503-7098-1
ISSN
—
e-ISSN
—
Number of pages
10
Pages from-to
291-300
Publisher name
ACM
Place of publication
New York, USA
Event location
Virtual Event, USA
Event date
Jul 13, 2020
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
—