Joonhwan Lee

• PhD
• Professor (Associate) at Seoul National University

The lack of reliable, personalized information often complicates sexual violence survivors' support-seeking. Recently, there is an emerging approach to conversational information systems for support-seeking of sexual violence survivors, featuring personalization with wide availability and anonymity. However, a single best solution might not exist a...

Individuals interact with algorithms in various ways. Users even game and circumvent algorithms so as to achieve favorable outcomes. This study aims to come to an understanding of how various stakeholders interact with each other in tricking algorithms, with a focus towards online review communities. We employed a mixed-method approach in order to...

Conversational agents have been showing lots of opportunities in healthcare by taking over a lot of tasks that used to be done by a human. One of the major functions of conversational healthcare agent is intervening users' daily behaviors. In this case, forming an intimate and trustful relationship with users is one of the major issues. Factors aff...

Online chat functions as a discussion channel for diverse social issues. However, deliberative discussion and consensus-reaching can be difficult in online chats in part because of the lack of structure. To explore the feasibility of a conversational agent that enables deliberative discussion, we designed and developed DebateBot, a chatbot that str...

Background Prolonged time of computer use increases the prevalence of ocular problems, including eye strain, tired eyes, irritation, redness, blurred vision, and double vision, which are collectively referred to as computer vision syndrome (CVS). Approximately 70% of computer users have vision-related problems. For these reasons, properly designed...

BACKGROUND Prolonged time of computer use increased the prevalence of ocular problems including eyestrain, tired eyes, irritation, redness, blurred vision, and double vision, collectively referred to as computer vision syndrome. Approximately 70 percent of computer users have vision-related problems. To design the effective screen intervention for...

As artificial intelligence (AI) technologies advance, the possibility of developing virtual agents capable of mimicking human beings is increasing. Furthermore, AI techniques applicable to mimicking certain features of a specific person (e.g., facial expression, voice, motion) are becoming more sophisticated. Although the HCI community has explored...

Augmentative and alternative communication (AAC) technologies are widely used to help non-verbal children enable communication. For AAC-aided communication to be successful, caregivers should support children with consistent intervention strategies in various settings. As such, caregivers need to continuously observe and discuss children’s AAC usag...

Although group chat discussions are prevalent in daily life, they have a number of limitations. When discussing in a group chat, reaching a consensus often takes time, members contribute unevenly to the discussion, and messages are unorganized. Hence, we aimed to explore the feasibility of a facilitator chatbot agent to improve group chat discussio...

Live quiz shows that make use of mobile applications embed aspects of both games and live streaming. To understand users' motivations and experiences related to these mobile quiz shows, we used a mixed-methods approach that includes interviews (N = 16) and a survey (N = 296). We conducted a thematic analysis of interviews to identify seven motivati...

As the uses of conversational agents increase, the affective and social abilities of agents become important with their functional abilities. Agents that lack affective abilities could frustrate users during interaction. This study applied personality to implement the natural feedback of conversational agents referring to the concept of affective c...

This study aims to explore the feasibility of a text-based virtual agent as a new survey method to overcome the web survey's common response quality problems, which are caused by respondents' inattention. To this end, we conducted a 2 (platform: web vs. chatbot) × 2 (conversational style: formal vs. casual) experiment. We used satisficing theory to...

For the past few years, voice assistant (VA) has been widely used around the world. Current voice assistants provide a gendered voice to sound more natural and life-like, but most of them have a female voice as a default voice setting. Our study explored how gender stereotypes of women are reflected in voice assistants with female voices through an...

In this study, we apply a "conversational search" to the design of the news service of smart speakers so that users can actively get richer information while listening to the news. We designed a research prototype called "Anchor," where a smart speaker news assistant provides users with news about specific keywords and responds to users' questions....

In this paper, we present Touch+Finger, a new interaction technique that augments touch input with multi-finger gestures for rich and expressive interaction. The main idea is that while one finger is engaged in a touch event, a user can leverage the remaining fingers, the "idle" fingers, to perform a variety of hand poses or in-air gestures to exte...

BACKGROUND In addition to addiction and substance abuse, motivational interviewing (MI) is increasingly being integrated in treating other clinical issues such as mental health problems. Despite many technological adaptations of MI, most of them have focused on delivering the action-oriented treatment, leaving its relational component unexplored or...

The purpose of this study is to examine people's expectations and preferences for a robot's personality based on the tasks the robot is performing. We conducted an interview followed by a survey. In the semi-structured interview, we classified four categories of tasks expected to be completed by robots: social, office, service, and physical. Based...

Algorithms are playing an increasingly important role in the production of news content as their computation capacity in manipulating large-scale data continues to grow. In this article, we present Personalized and Interactive News Generation System (PINGS), an algorithm-driven news generation system that is designed to provide personalized and int...

In this article, we aim to offer audiences opportunities to have an immersive experience with the statistical figures in the news. We go beyond the current numerical information representation method to develop a new system for improving the numerical experience. We implemented three different conditions for representing numerical information: 1) t...

Social media could serve as an easy and fast window to the climate of public opinion. In the current study, we examined the influence of perceived opinion climate revealed via Twitter postings in shaping televised debate viewers’ candidate evaluation. We conducted two Web-based experiments in the high- and low-stimulus elections: (a) the 2012 Korea...

Since the 1987 democratic reform, regional attitudes toward the two southern provinces have been regarded as the most significant determinant of South Korean voters’ political preferences. In recent years, however, many scholars have speculated that regional animus is losing its ground as a basis for political judgment and will eventually be replac...

It is widely accepted that people tend to associate more and feel closer to those who share similar attributes with themselves. Most of the research on the phenomenon has been carried out in face-to-face contexts. However, it is necessary to study the phenomenon in computer-mediated contexts as well. Exploring Facebook is important in that friendsh...

Participants were initially recruited via an online campus website of Seoul National University, Facebook, and Twitter. It was explicitly stated on the recruitment flyer and the informed consent that the collected data on profile information, survey questionnaire, and interaction behavior will be used in order to explore the relationships between s...

A message asking for permission to access data included lists of information that would be crawled once the participant grants the access. Specifically, public profile, friend list, email address, custom friends lists, messages, News Feed, relationships, birthday, work history, status updates, education history, groups, hometown, current city, phot...

Established literature supports the notion that depressed individuals tend to be socially maladjusted and behave differently from those who aren't depressed. Yet, previous studies seem to overlook the influence of personality on behavior. Particularly, neuroticism may moderate the effect of depression on the way people behave. As one of the Big-Fiv...

As the smartphone has become more widely available, we easily take photos and upload them online to share with others. Photographs are abundant, but they are not used properly, even though they provide meaningful information about the social scenes of our daily lives. To address this issue, Histogram was created as a new interface for displaying an...

As mobile instant messaging has become a major means of communication with the widespread use of smartphones, emoticons, symbols that are meant to indicate particular emotions in instant messages, have also developed into various forms. The primary purpose of this study is to classify the usage patterns of emoticons focusing on a particular variant...

With the spread of social media and mobile devices, people spend more time on online than ever before. As more people participate in various online activities, much research has been conducted on how to make use of the time effectively and productively. In this paper, we propose two methods which can be used to extract highlights and make searchabl...

Automated journalism, automatically generating stories based on algorithms, has received considerable critical attention in diverse fields. However, automated journalism has not addressed the TV industry in much detail. This research aims to create a system to automatically generate news about TV ratings. The framework will involve undergoing the p...

Recently drivers have greatly benefited from new vehicular technologies such as in-car navigation systems, but at the same time they can be easily distracted from those technologies. Consequently, creating displays that balance the communication of information with the attentional demand imposed on the driver is of increasing importance. A set of r...

The widespread use of mobile devices has transformed casual places into meeting places. However, in these places, it is uncommon to have shared information workspace such as a beam projector, making it inconvenient and inefficient to exchange information and to get a direct feedback. To address this challenge, we present Ubi-jector, a mobile system...

On Korean websites, people often use several Korean vowels or consonants solely, which is the way to express emotion. This way of expression has scarcely been examined seriously, though it is one of the most popular online slangs. This is an exploratory study that reveals how and how much these expressions are used on social media. Data crawling te...

The amount of accessible information online is rapidly expanding. This increases the demand for a support tool that can help people acquire information in a short period of time. Highlights can help with reading, especially by enhancing the effectiveness of skim reading. This paper suggests a novel method of collecting reading-pattern data from a g...

Kinetic typography has been suggested to express emotions in computer-mediated communication (CMC) by empowering static texts with dynamic attributes, where conversations occur primarily in text-based forms. In this work, we investigate whether pre-defined kinetic typography effects are capable of delivering emotions, and further, which specific at...

As people spend more time online, watching YouTube or playing games, a number of research studies arose in ways to make use of the time and energy from the crowd in doing such activities. In this paper, we have explored the possibility of converting the collective resources from the crowd in making useful information back to people. We collected po...

We propose a system called Ubi-Jector, which provides a shared information screen utilizing participants' personal mobile devices in casual meeting places. This system can successfully substitute for a large projector screen in most conventional meeting rooms, such as cafeterias, lobbies, or libraries, and also enable all participants to communicat...

Now we display information everywhere, but ceiling is the last place we haven't used extensively. A ceiling at home, an overhead surface ordinarily used for structural and aesthetic purpose and less used compared to other interior surfaces, is expected to be a perfect screen when people lay on the bed. In this paper, we present Hands-Up system, our...

The elder population is rising worldwide; in the US, no longer being able to drive is a significant marker of loss of independence. One of the approaches to helping elders drive more safely is to investigate the use of automotive user interface technology, and specifically, to explore the instrument panel (IP) display design to help attract and man...

As society becomes increasingly saturated with information, the design of that information becomes ever more important. However, rather than reinforcing the agency of the user, many information design products limit one's possibilities for action. Take bus route maps (Figure 1), for instance. No problems emerge when looking at each bus route separa...

Assessment of difficulties within group processes, especially through automatic means, is a problem of great interest to the broader CSCL community. Group difficulties can be revealed through interaction processes that occur during group work. Whether these patterns are encoded in speech recorded from face-to-face interactions or in text from on-li...

The use of system diagrams has encouraged information designers to tacitly consider the holistic context. However, because the traditional understanding about the nature of systems has been highly focused on the arrangement of components within a static model, users' experience is considered little. The goal of this research is to provide a theoret...

Drivers need assistance when navigating an unfamiliar route. In-vehicle navigation systems have improved in recent years due to the technology advances, but are sometimes problematic because of information overload while driving. To address the attentional demands of reading a map while driving, we have developed the maps optimized for vehicular en...

ABSTRACT Text-based interpersonal communication ,tools such ,as instant messenger,are widely used today. These tools often feature emoticons ,that people use to express ,emotion ,to some degree. However, emoticons still lack the ability to communicate the details of an emotional response, such as the speaker’s tone of voice,or intensity of emotion....

Text-based interpersonal communication tools such as instant messenger are widely used today. These tools often feature emoticons that people use to express emotion to some degree. However, emoticons still lack the ability to communicate the details of an emotional response, such as the speaker’s tone of voice or intensity of emotion. In this paper...

In-vehicle navigation has changed substantially in recent years, due to the advent of computer generated maps and directions. However, these maps are still problematic, due to a mismatch between the complexity of the maps and the attentional demands of driving. In response to this problem, we are developing the MOVE (Maps Optimized for Vehicular En...