| Vol-2948 urn:nbn:de:0074-2948-1 Copyright © 2021 for the individual papers by the papers' authors. Copyright © 2021 for the volume as a collection by its editors. This volume and its papers are published under the Creative Commons License Attribution 4.0 International (CC BY 4.0).

# IntRS 2021
Interfaces and Human Decision Making for Recommender Systems 2021

### Proceedings of the 8th Joint Workshop on Interfaces and Human Decision Making for Recommender Systems
co-located with 15th ACM Conference on Recommender Systems (RecSys 2021)

### Online Event, September 25 and September 29, 2021.

Edited by

### Peter Brusilovsky *
Marco de Gemmis **
Alexander Felfernig ***
Elisabeth Lex ****
Pasquale Lops **
Giovanni Semeraro **
Martijn C. Willemsen *****

* University of Pittsburgh, School of Information Sciences, Pittsburgh, USA
** University of Bari Aldo Moro, Department of Computer Science, Bari, Italy
*** Graz University of Technology, Institute for Software Technology, Graz, Austria
**** Graz University of Technology, Institute of Interactive Systems and Data Science, Graz, Austria
***** Eindhoven University of Technology, Department of Industrial Engineering and Innovation Sciences, Eindhoven, The Netherlands

## Table of Contents

- Preface
  Summary: There were 10 papers submitted for peer-review to this workshop. Out of these, 8 papers were accepted for this volume, 5 as long papers and 3 as short papers.

### Invited Talk

- Group Decision Making and Group Recommender Systems 1-2
  Anthony Jameson

### Long Papers

- ConvEx-DS: A Dataset for Conversational Explanations in Recommender Systems 3-20
  Diana C. Hernandez-Bocanegra, Jürgen Ziegler
- Mixed-Modality Interaction in Conversational Recommender Systems 21-37
  Yuan Ma, Timm Kleemann, Jürgen Ziegler
- How does the User's Knowledge of the Recommender Influence their Behavior? 38-54
  Muheeb Faizan Ghori, Arman Dehpanah, Jonathan Gemmell, Hamed Qahri-Saremi, Bamshad Mobasher
- Input or Output: Effects of Explanation Focus on the Perception of Explainable Recommendation with Varying Level of Details 55-72
  Mouadh Guesmi, Mohamed Amine Chatti, Laura Vorgerd, Shoeb Joarder, Qurat Ul Ain, Thao Ngo, Shadi Zumor, Yiqi Sun, Fangzheng Ji, Arham Muslim
- Evaluating Explainable Interfaces for a Knowledge Graph-Based Recommender System 73-88
  Erasmo Purificato, Baalakrishnan Aiyer Manikandan, Prasanth Vaidya Karanam, Mahantesh Vishvanath Pattadkal, Ernesto William De Luca

### Short Papers

- Your Eyes Explain Everything: Exploring the Use of Eye Tracking to Provide Explanations On-the-fly 89-100
  Martijn Millecamp, Toon Willemot, Katrien Verbert
- The Immunity of Users' Item Selection from Serial Position Effects in Multi-Attribute Item Recommendation Scenarios 101-111
  Thi Ngoc Trang Tran, Carmen Isabella Baumann, Alexander Felfernig, Viet Man Le
- Controlling Personalized Recommendations in Two Dimensions with a Carousel-Based Interface 112-122
  Behnam Rahdari, Peter Brusilovsky, Alireza Javadian Sabet

2021-09-14: submitted by Marco de Gemmis, metadata incl. bibliographic data published under Creative Commons CC0
2021-09-20: published on CEUR Workshop Proceedings (CEUR-WS.org, ISSN 1613-0073) |valid HTML5|