Ignacio Díaz-Oreiro

University of Costa Rica | UCR · Centro de Investigaciones en Tecnologías de la Información y Comunicación (CITIC)

In recent years there has been an increase of voice interfaces, driven by developments in Artificial Intelligence and the expansion of commercial devices that use them, such as smart assistants present on phones or smart speakers. One field that could take advantage of the potential of voice interaction is in the self-administered surveys data coll...

Standardized questionnaires are widely used instruments to evaluate UX and their capture mechanism has been implemented in written form, either on paper or in digital format. This study aims to determine if the UX evaluations obtained in the standardized UEQ questionnaire (User Experience Questionnaire) are equivalent if the response capture mechan...

Background. Standardized questionnaires are well-known, reliable, and inexpensive instruments to evaluate user experience (UX). Although the structure, content, and application procedure of the three most recognized questionnaires (AttrakDiff, UEQ, and meCUE) are known, there is no systematic literature review (SLR) that classifies how these questi...

At present, there are systems in charge of classifying and sending notifications to smart devices at different times. However, there are not many studies that demonstrate the effectiveness of these systems in real world settings. We propose a method that classifies and prioritizes notifications by analyzing only the content of the notification and...

Standardized questionnaires are one of the methods used to evaluate User Experience (UX). Standardized questionnaires are composed of an invariable group of questions that users answer themselves after using a product or system. They are considered reliable and economical to apply. The standardized questionnaires most recognized for UX evaluation a...

Natural user interfaces are becoming popular. One of the most common natural user interfaces nowadays are voice activated interfaces, particularly smart personal assistants such as Google Assistant, Alexa, Cortana, and Siri. This paper presents the results of an evaluation of these four smart personal assistants in two dimensions: the correctness o...

Software development has been impacted by the arrival of agile frameworks, especially in the last two decades. The HELENA Project (Hybrid dEveLopmENt Approaches in software systems development) was developed to identify the use of these frameworks in relation to more traditional ones. As part of this project, a survey was carried out in 55 countrie...

In recent years, many studies have focused on software development practices around the world. The HELENA study is an international effort to gather quantitative data on software development practices and frameworks. In this paper, we present the Costa Rican results of the HELENA survey. We provide evidence of the practices and frameworks used in 5...