† Ana Berdasco *, Gustavo López, Ignacio Diaz, Luis Quesada and Luis A. Guerrero



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User Experience Comparison of Intelligent Personal

2. Related Work 
There are different ways in which personal assistants can be evaluated by voice; in some cases, 
the creators of the assistants offer an evaluation mechanism. However, rather than measuring how 
satisfied the users are with the assistants, they measure the capacity they have to perform specific 
tasks. For example, Amazon offers an evaluation guide for Alexa, where one of the tasks is to create 
a notification [8]. This allows evaluating the ability of Alexa to execute the task, but not the 
satisfaction of the user. 
Many of the works that stand out in the literature are focused on the evaluation of a single 
assistant and the tasks that it can perform from searches and configuration notifications, among other 
tasks. At the same time, they point out the challenges that users may face with attendees, for example, 
that sometimes the user must repeat the command that was used or that integration problems with 
other devices may arise, among other challenges [9]. 
A group of researchers of the Department of Future Technologies, University of Turku, Finland, 
investigated the usability, user experiences, and usefulness of the Google Home smart speaker. The 
findings showed that Google Home is usable and user-friendly for the user [9], but the study did not 
include other assistants like Alexa or Cortana. 
The paper “Alexa, Siri, Cortana, and More: An Introduction to Voice Assistants” is an example, 
which not only makes an evaluation of the tasks that the assistants offer, like sending emails and 
messages, among others, but also includes topics such as privacy and the problems of security that 
the assistants face to handle the information of the users [10]. 
Another study was carried out by a group of researchers from Microsoft [2] that tried to 
automate the evaluation of the attendees and predict the quality of voice recognition. Most of the 
work is in creating a model that allows evaluating the tasks supported without needing a physical 
person to do it, and the satisfaction is evaluated in terms of the capacity of the assistant to understand 
the assigned task. 
On the other hand, there are also studies that not only focus on evaluating the skills of the 
assistants but have begun to take into account as part of the evaluation the affective experiences of 
the users with the assistants [11]. Yang found that the affective responses differed depending on the 
scenario; for example, some factors that underlie the quality are the comfort in the conversation 
between the machine and the man, the pride of using cutting-edge technology, the fun during use, 
the perception of having a human person, privacy, and the fear of distraction 
One approach worth mentioning is that of the authors Lopez, Quesada and Guerrero [12]. They 
proposed a study in which they evaluated the answers of the assistants based on the accuracy and 
naturalness of the answers of the devices. This maintains the focus of evaluating the tasks that the 
assistants perform but also consider the quality of the user–assistant interaction. Our work is partially 
based on this paper, which served as a reference for the evaluation of intelligent personal assistants. 


Proceedings 

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