Open Access Published by Oldenbourg Wissenschaftsverlag

Volume 19 Issue 3 - Special Issue "User-Centered Artificial Intelligence"

Issue of i-com

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Contents
Journal Overview

Publicly Available January 14, 2021

Editorial

Publicly Available January 15, 2021

Editorial

Daniel Buschek, Benedikt Loepp, Jürgen Ziegler

Page range: 169-169

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Research Article

Open Access January 15, 2021

Explainable AI and Multi-Modal Causability in Medicine

Andreas Holzinger

Page range: 171-179

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Abstract

Progress in statistical machine learning made AI in medicine successful, in certain classification tasks even beyond human level performance. Nevertheless, correlation is not causation and successful models are often complex “black-boxes”, which make it hard to understand why a result has been achieved. The explainable AI (xAI) community develops methods, e. g. to highlight which input parameters are relevant for a result; however, in the medical domain there is a need for causability: In the same way that usability encompasses measurements for the quality of use, causability encompasses measurements for the quality of explanations produced by xAI. The key for future human-AI interfaces is to map explainability with causability and to allow a domain expert to ask questions to understand why an AI came up with a result, and also to ask “what-if” questions (counterfactuals) to gain insight into the underlying independent explanatory factors of a result. A multi-modal causability is important in the medical domain because often different modalities contribute to a result.

Publicly Available January 15, 2021

Explaining Review-Based Recommendations: Effects of Profile Transparency, Presentation Style and User Characteristics

Diana C. Hernandez-Bocanegra, Jürgen Ziegler

Page range: 181-200

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Abstract

Providing explanations based on user reviews in recommender systems (RS) may increase users’ perception of transparency or effectiveness. However, little is known about how these explanations should be presented to users, or which types of user interface components should be included in explanations, in order to increase both their comprehensibility and acceptance. To investigate such matters, we conducted two experiments and evaluated the differences in users’ perception when providing information about their own profiles, in addition to a summarized view on the opinions of other customers about the recommended hotel. Additionally, we also aimed to test the effect of different display styles (bar chart and table) on the perception of review-based explanations for recommended hotels, as well as how useful users find different explanatory interface components. Our results suggest that the perception of an RS and its explanations given profile transparency and different presentation styles, may vary depending on individual differences on user characteristics, such as decision-making styles, social awareness, or visualization familiarity.

Publicly Available January 15, 2021

Demystifying Deep Learning: Developing and Evaluating a User-Centered Learning App for Beginners to Gain Practical Experience

Sven Schultze, Uwe Gruenefeld, Susanne Boll

Page range: 201-213

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Abstract

Deep Learning has revolutionized Machine Learning, enhancing our ability to solve complex computational problems. From image classification to speech recognition, the technology can be beneficial in a broad range of scenarios. However, the barrier to entry is quite high, especially when programming skills are missing. In this paper, we present the development of a learning application that is easy to use, yet powerful enough to solve practical Deep Learning problems. We followed the human-centered design approach and conducted a technical evaluation to identify solvable classification problems. Afterwards, we conducted an online user evaluation to gain insights on users’ experience with the app, and to understand positive as well as negative aspects of our implemented concept. Our results show that participants liked using the app and found it useful, especially for beginners. Nonetheless, future iterations of the learning app should step-wise include more features to support advancing users.

Publicly Available January 15, 2021

How to Handle Health-Related Small Imbalanced Data in Machine Learning?

Maria Rauschenberger, Ricardo Baeza-Yates

Page range: 215-226

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Abstract

When discussing interpretable machine learning results, researchers need to compare them and check for reliability, especially for health-related data. The reason is the negative impact of wrong results on a person, such as in wrong prediction of cancer, incorrect assessment of the COVID-19 pandemic situation, or missing early screening of dyslexia. Often only small data exists for these complex interdisciplinary research projects. Hence, it is essential that this type of research understands different methodologies and mindsets such as the Design Science Methodology , Human-Centered Design or Data Science approaches to ensure interpretable and reliable results. Therefore, we present various recommendations and design considerations for experiments that help to avoid over-fitting and biased interpretation of results when having small imbalanced data related to health. We also present two very different use cases: early screening of dyslexia and event prediction in multiple sclerosis.

Publicly Available January 15, 2021

Intelligent Questionnaires Using Approximate Dynamic Programming

Frédéric Logé, Erwan Le Pennec, Habiboulaye Amadou-Boubacar

Page range: 227-237

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Abstract

Inefficient interaction such as long and/or repetitive questionnaires can be detrimental to user experience, which leads us to investigate the computation of an intelligent questionnaire for a prediction task. Given time and budget constraints (maximum q questions asked), this questionnaire will select adaptively the question sequence based on answers already given. Several use-cases with increased user and customer experience are given. The problem is framed as a Markov Decision Process and solved numerically with approximate dynamic programming, exploiting the hierarchical and episodic structure of the problem. The approach, evaluated on toy models and classic supervised learning datasets, outperforms two baselines: a decision tree with budget constraint and a model with q best features systematically asked. The online problem, quite critical for deployment seems to pose no particular issue, under the right exploration strategy. This setting is quite flexible and can incorporate easily initial available data and grouped questions.

Open Access January 15, 2021

Reflecting on Social Media Behavior by Structuring and Exploring Posts and Comments

Eelco Herder, Daniel Roßner, Claus Atzenbeck

Page range: 239-250

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Abstract

Social networks use several user interaction techniques for enabling and soliciting user responses, such as posts, likes and comments. Some of these triggers may lead to posts or comments that a user may regret at a later stage. In this article, we investigate how users may be supported in reflecting upon their past activities, making use of an exploratory spatial hypertext tool. We discuss how we transform raw Facebook data dumps into a graph-based structure and reflect upon design decisions. First results provide insights in users motivations for using such a tool and confirm that the approach helps them in discovering past activities that they perceive as outdated or even embarrassing.

Publicly Available January 15, 2021

Examining Autocompletion as a Basic Concept for Interaction with Generative AI

Florian Lehmann, Daniel Buschek

Page range: 251-264

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Abstract

Autocompletion is an approach that extends and continues partial user input. We propose to interpret autocompletion as a basic interaction concept in human-AI interaction. We first describe the concept of autocompletion and dissect its user interface and interaction elements, using the well-established textual autocompletion in search engines as an example. We then highlight how these elements reoccur in other application domains, such as code completion, GUI sketching, and layouting. This comparison and transfer highlights an inherent role of such intelligent systems to extend and complete user input, in particular useful for designing interactions with and for generative AI. We reflect on and discuss our conceptual analysis of autocompletion to provide inspiration and a conceptual lens on current challenges in designing for human-AI interaction.

About this journal

Objective
This journal is devoted to human-computer interaction, media design, usability, engineering and systems evaluation, software ergonomics, cooperative systems, e-learning, mobile and ubiquitous systems, user-adaptive systems, agent development tools and methods for media in different application fields (including e-business, knowledge management, leisure and entertainment, transport, engineering, and medicine), barrier-free systems design, and the social aspects of information and communication technologies.

The journal seeks to build bridges between research and practice as well as between teaching and business, emphasizing interdisciplinary teamwork and application-oriented solutions.

The journal is the official organ of the special interest group on "Human-Computer Interaction (HCI)" in the German Association for Informatics (GI).

i-com is an open access journal since 2023. It publishes English-language articles only. The publication frequency is three times per year.

Topics

Computer science
Psychology
Media design
Marketing/branding
Sociology
Business management
Labor and organizational studies

Article formats
Expert research, review articles, and brief reports

Volume 19 Issue 3 - Special Issue "User-Centered Artificial Intelligence"

Issue of i-com

Frontmatter

Editorial

Explainable AI and Multi-Modal Causability in Medicine

Abstract

Explaining Review-Based Recommendations: Effects of Profile Transparency, Presentation Style and User Characteristics

Abstract

Demystifying Deep Learning: Developing and Evaluating a User-Centered Learning App for Beginners to Gain Practical Experience

Abstract

How to Handle Health-Related Small Imbalanced Data in Machine Learning?

Abstract

Intelligent Questionnaires Using Approximate Dynamic Programming

Abstract

Reflecting on Social Media Behavior by Structuring and Exploring Posts and Comments

Abstract

Examining Autocompletion as a Basic Concept for Interaction with Generative AI

Abstract