Explanipedia

Reshaping Higher Education Designs and Futures: Postdigital Co-design with Generative Artificial Intelligence Open

Sandris Zeivots, Alison Casey, Tiffany Winchester, Jack Webster, Xin Wang , et al. · 2025

This article examines how collaborative design practices in higher education are reshaped through postdigital entanglement with generative artificial intelligence (GenAI). We collectively explore how co-design, an inclusive, iterative, and…

Sense and Sensibility: What makes an social robot convincing to high-school students? Open

Pablo González-Oliveras, Olov Engwall, Ali Reza Majlesi · 2025

Sense and Sensibility: What makes a social robot convincing to high-school students? Open

Pablo González-Oliveras, Olov Engwall, Ali Reza Majlesi · 2025

This study with 40 high-school students demonstrates the high influence of a social educational robot on students' decision-making for a set of eight true-false questions on electric circuits, for which the theory had been covered in the s…

Social Educational Robotics and Learning Analytics: A Scoping Review of an Emerging Field Open

Pablo González-Oliveras, Olov Engwall, Adriana Wilde · 2025

Social Educational Robotics and Learning Analytics (LA) are prominent fields in technology-enhanced learning, but their combined potential remains underexplored, despite methodological similarities. Increasingly, signs of joint interests h…

Conformity and Trust in Multi-party vs. Individual Human-Robot Interaction Open

Alireza M. Kamelabad, Olov Engwall, Gabriel Skantze · 2024

In this study, we explored how conformity and trust vary in adolescent students’ interactions with a social robot. Specifically, we compared how this was influenced by whether the participants had individual or multi-party interaction with…

Speaking Transparently: Social Robots in Educational Settings Open

Ronald Cumbal, Olov Engwall · 2024

The recent surge in popularity of Large Language Models, known for their inherent opacity, has increased the interest in fostering transparency in technology designed for human interaction. This concern is equally prevalent in the developm…

Stereotypical nationality representations in HRI: perspectives from international young adults Open

Ronald Cumbal, Agnes Axelsson, Shivam Mehta, Olov Engwall · 2023

People often form immediate expectations about other people, or groups of people, based on visual appearance and characteristics of their voice and speech. These stereotypes, often inaccurate or overgeneralized, may translate to robots tha…

Editorial: Socially, culturally and contextually aware robots Open

Olov Engwall, Antonio J. Rubio, Suna Bensch, Kerstin S. Haring, Takayuki Kanda , et al. · 2023

EDITORIAL article Front. Robot. AI, 03 November 2023Sec. Human-Robot Interaction Volume 10 - 2023 | https://doi.org/10.3389/frobt.2023.1232215

Managing Turn-Taking in Human-Robot Interactions Open

Ali Reza Majlesi, Ronald Cumbal, Olov Engwall, Sarah Gillet, Silvia Kunitz , et al. · 2023

This study deals with turn-taking in human-robot interactions (HRI). Based on 15 sessions of video-recorded interactions between pairs of human participants and a social robot called Furhat, we explore how human participants orient to viol…

Socio-cultural perception of robot backchannels Open

Olov Engwall, Ronald Cumbal, Ali Reza Majlesi · 2023

Introduction: Backchannels, i.e., short interjections by an interlocutor to indicate attention, understanding or agreement regarding utterances by another conversation participant, are fundamental in human-human interaction. Lack of backch…

Learner and teacher perspectives on robot-led L2 conversation practice Open

Olov Engwall, José Lopes, Ronald Cumbal, Gustav Berndtson, Ruben Lindström , et al. · 2022

This article focuses on designing and evaluating conversation practice in a second language (L2) with a robot that employs human spoken and non-verbal interaction strategies. Based on an analysis of previous work and semi-structured interv…

Identification of Low-engaged Learners in Robot-led Second Language Conversations with Adults Open

Olov Engwall, Ronald Cumbal, José Lopes, Mikael Ljung, Linnea Månsson · 2022

The main aim of this study is to investigate if verbal, vocal, and facial information can be used to identify low-engaged second language learners in robot-led conversation practice. The experiments were performed on voice recordings and v…

Is a Wizard-of-Oz Required for Robot-Led Conversation Practice in a Second Language? Open

Olov Engwall, José Lopes, Ronald Cumbal · 2022

“You don’t understand me!”: Comparing ASR Results for L1 and L2 Speakers of Swedish Open

Ronald Cumbal, Birger Moëll, José Lopes, Olov Engwall · 2021

The performance of Automatic Speech Recognition (ASR)systems has constantly increased in state-of-the-art develop-ment. However, performance tends to decrease considerably inmore challenging conditions (e.g., background noise, multiplespea…

Detection of Listener Uncertainty in Robot-Led Second Language Conversation Practice Open

Ronald Cumbal, José Lopes, Olov Engwall · 2020

Uncertainty is a frequently occurring affective state that learners ex-perience during the acquisition of a second language. This state canconstitute both a learning opportunity and a source of learner frus-tration. An appropriate detectio…

Simulation of vowel‐vowel utterances using a <span>3D</span> biomechanical‐acoustic model Open

Saeed Dabbaghchian, Marc Arnela, Olov Engwall, Oriol Guasch · 2020

A link is established between biomechanical and acoustic 3D models for the numerical simulation of vowel‐vowel utterances. The former rely on the activation and contraction of relevant muscles for voice production, which displace and disto…

Interaction and collaboration in robot-assisted language learning for adults Open

Olov Engwall, José Lopes · 2020

This article analyses how robot–learner interaction in robot-assisted language learning (RALL) is influenced by the interaction behaviour of the robot. Since the robot behaviour is to a large extent determined by the combination of teachin…

Uncertainty in Robot Assisted Second Language Conversation Practice Open

Ronald Cumbal, José Lopes, Olov Engwall · 2020

Moments of uncertainty are common for learners when practicing a second language. The appropriate management of these events could help avoid the development of frustration and benefit the learner's experience. Therefore, its detection is …

Robot Interaction Styles for Conversation Practice in Second Language Learning Open

Olov Engwall, José Lopes, Anna Åhlund · 2020

MRI-Based Vocal Tract Representations for the Three-Dimensional Finite Element Synthesis of Diphthongs Open

Marc Arnela, Saeed Dabbaghchian, Oriol Guasch, Olov Engwall · 2019

The synthesis of diphthongs in three-dimensions (3D) involves the simulation of acoustic waves propagating through a complex 3D vocal tract geometry that deforms over time. Accurate 3D vocal tract geometries can be extracted from Magnetic …

The effect of a physical robot on vocabulary learning Open

Andreas Wedenborn, Preben Wik, Olov Engwall, Jonas Beskow · 2019

This study investigates the effect of a physical robot taking the role of a teacher or exercise partner in a language learning exercise. In order to investigate this, an application was developed enabling a 2:nd language learning vocabular…

Reconstruction of vocal tract geometries from biomechanical simulations Open

Saeed Dabbaghchian, Marc Arnela, Olov Engwall, Oriol Guasch · 2018

Medical imaging techniques are usually utilized to acquire the vocal tract geometry in 3D, which may then be used, eg, for acoustic/fluid simulation. As an alternative, such a geometry may also be acquired from a biomechanical simulation, …

A First Visit to the Robot Language Café Open

José Lopes, Olov Engwall, Gabriel Skantze · 2017

We present an exploratory study on using a social robot in a conversational setting to practice a second language. The prac- tice is carried out within a so called language cafe ́, with two second language learners and one native moderator;…

Synthesis of VV Utterances from Muscle Activation to Sound with a 3D Model Open

Saeed Dabbaghchian, Marc Arnela, Olov Engwall, Oriol Guasch · 2017

We propose a method to automatically generate deformable 3D vocal tract geometries from the surrounding structures in a biomechanical model. This allows us to couple 3D biomechanics and acoustics simulations. The basis of the simulations i…

A Semi-Polar Grid Strategy for the Three-Dimensional Finite Element Simulation of Vowel-Vowel Sequences Open

Marc Arnela, Saeed Dabbaghchian, Oriol Guasch, Olov Engwall · 2017

Three-dimensional computational acoustic models need very detailed 3D vocal tract geometries to generate high quality sounds. Static geometries can be obtained from Magnetic Resonance Imaging (MRI), but it is not currently possible to capt…

Influence of vocal tract geometry simplifications on the numerical simulation of vowel sounds Open

Marc Arnela, Saeed Dabbaghchian, Rémi Blandin, Oriol Guasch, Olov Engwall , et al. · 2016

For many years, the vocal tract shape has been approximated by one-dimensional (1D) area functions to study the production of voice. More recently, 3D approaches allow one to deal with the complex 3D vocal tract, although area-based 3D geo…

Using a Biomechanical Model and Articulatory Data for the Numerical Production of Vowels Open

Saeed Dabbaghchian, Marc Arnela, Olov Engwall, Oriol Guasch, Ian Stavness , et al. · 2016

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Effects of vocal tract geometry simplifications on the numerical simulation of vowels Open

Marc Arnela, Saeed Dabbaghchian, Rémi Blandin, Oriol Guasch, Olov Engwall , et al. · 2015

QC 20160322

Simplification of vocal tract shapes with different levels of detail. Open

Saeed Dabbaghchian, Marc Arnela, Olov Engwall · 2015

We propose a semi-automatic method to regenerate simplified vocal tract geometries from very detailed input (e.g. MRI-based geometry) with the possibility to control the level of detail, while maintaining the overall properties. The simpli…

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