Notifications are a core feature of mobile phones. They inform users about a variety of
events. Users may take immediate action or ignore them depending on the importance of a …

Mobile applications (apps) are software developed for use on mobile devices and made
available through app stores. App stores are highly competitive markets where developers …

The application of automatic conversational system (chatbot) in learning foreign language is
still limited. In this study, we built a chatbot dedicated to English learners. The system is …

Given the large number of installed apps and the limited screen size of mobile devices, it is
often tedious for users to search for the app they want to use. Although some mobile OSs …

Consumer virtual reality systems are now becoming widely available. We report on a study
on presence and embodiment within virtual reality that was conductedin the wild', in that …

We investigate opportunities and challenges of running virtual reality (VR) studies remotely.
Today, many consumers own head-mounted displays (HMDs), allowing them to participate …

Online evaluation is one of the most common approaches to measure the effectiveness of an
information retrieval system. It involves fielding the information retrieval system to real users …

Touchscreens became the dominant input device for smartphones. Users' touch behaviour
has been widely studied in lab studies with a relative low number of participants. In contrast …

This paper describes a real world deployment of a context-aware mobile app recommender
system (RS) called Frappe. Utilizing a hybrid-approach, we conducted a large-scale app …

Many user studies are now conducted outside laboratories to increase the number and
heterogeneity of participants. These studies are conducted in diverse settings, with the …