Karen Villalba

Karen Villalba

*This is an algorithmically generated author record based on publicly available information.

Current Organizations / Institutes

The organizations/institutes from the scholar's latest article


Karen Villalba has a total of 36 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Using Culturally Relevant Narratives to Teach Electrical Risk Management in Schools: A Case Study from the Colombian Caribbean

    by Ingrid Oliveros, Johan De La Rosa Yacomelo, Paola Harris Bonet, Jose Soto, Óscar Daniel Campo, Andrea Cancino-Borbón, Adriana Arango Manrique, Heydy Robles Noriega, Karen Villalba

    Electrical injuries remain a critical public health concern in low-income urban areas where informal settlements often lack safe electrical infrastructure and adequate educational resources. In Colombia, forensic and epidemiological reports indicate that most electrocution deaths are linked to preventable risk factors such as high-voltage exposure and unauthorized household wiring. Traditional strategies focused on regulatory compliance have shown limited effectiveness in these settings, overlooking systemic neglect and community dynamics. This paper presents a multidisciplinary educational initiative titled Using Culturally Relevant Narratives to Teach Electrical Risk Management in Schools, which employs culturally meaningful narratives to foster electrical safety awareness through STEAMbased pedagogy. The transmedia, interactive narrative La Chispa de Emilia follows the story of a teenage girl who, after losing her parents in an electrical fire, returns to her ancestral village and transforms her tragedy into collective learning and community empowerment. The approach emphasizes contextual learning, emotional engagement, and the integration of technical and cultural knowledge to develop proactive risk awareness. By shifting from rule-based instruction to systems-informed education, the project offers a transformative model for injury prevention and behavioral change in vulnerable populations.

  • Open Access

    An activity theory-based exploration of “Eyeland”, a task-based serious game for EFL visually impaired students

    by Karen Villalba, Heydy Robles, Miguel Jimeno, Martha Cecilia Delgado-Cañas, Adriana Perez, Francisco Quintero

    This study investigates how the Eyeland app, an accessible task-based serious game for English as a foreign language (EFL), can remediate traditional lessons for both visually impaired students (VISs) and sighted students (those without visual impairments) in a public high school in Colombia. Using an activity theory framework and its derived model, the Activity Theory-Based Model of Serious Games (ATMSG), the study explores the characteristics of traditional EFL lessons designed for these students, the adjustments made while integrating the Eyeland app, and the resulting changes in student experiences. The research employed action research cycles involving teachers in reflective processes that included planning, observing, acting, and re-planning to adapt and integrate Eyeland into the classroom. Qualitative research methods—field observations, focus groups, usability surveys, teacher interviews, and document analysis—were used to collect data and analyze how Eyeland was implemented and its effects on teaching and learning. Findings indicate that Eyeland effectively remediated traditional lessons by offering accessible, interactive features such as auditory, tactile, and visual support. These enhancements improved engagement for both sighted and visually impaired students. Traditional EFL lessons, which relied heavily on visual materials and teacher-centered methods, were transformed into more interactive, task-based activities that encouraged greater collaboration and student autonomy. Adjustments included redesigning lesson plans and rearranging classroom layouts to foster inclusion. Both sighted and visually impaired students reported positive experiences, particularly valuing the increased autonomy and engagement provided by Eyeland’s interactive tasks. The study highlights significant changes made to the lessons, with visually impaired students reporting predominantly positive experiences, though some teachers were reluctant to engage with the app. Eyeland contributed to the creation of inclusive classrooms by shifting from a teacher-centered approach to a student-centered learning environment that promoted better language learning outcomes. ATMSG was instrumental in analyzing how Eyeland fostered inclusive learning practices and provided valuable insights into re-mediation strategies, pedagogical planning, and the development of accessible content for EFL learners.


  • Open Access

    Eyeland: A Visually-Impaired Accessible English Learning Application Using a Design-Based Research Framework

    by Karen Villalba, Miguel Jimeno, Heydy Robles, Leonardo Vergara, Camilo Sinning, Leonardo Lizcano, Breynner Hurtado, Wilson Nieto

    This paper presents a Design-Based Research (DBR) framework for the development of an accessible English as a Foreign Language (EFL) application tailored for visually impaired users to support them in terms of audio enhancement, tactile feedback, screen reading and speech-to-text. The framework comprises four phases: the identification and analysis of current gaps in language learning applications and design of language content; the architectural design of the application, including its pedagogical components selection and revision of taxonomies; the testing and implementation of the application; and finally, the refinement process and formulation of design principles. Traditional language learning apps often rely on visual content, which is challenging for visually impaired users. Eyeland prioritizes auditory and tactile methods, ensuring compatibility with screen readers, high-contrast themes, robust zooming features, and audio descriptions for images to make learning accessible. This research focuses on creating a mobile application to enhance English teaching at the A1 level for high school students in Colombia, addressing challenges such as resource quality, collaborative learning, and inclusion of students. The methodology involves mobile task-based teaching. Visually impaired students showed an overall average score increase from 4.8 to 6.9, while sighted learners experienced a more significant rise from 4.1 to 9. High ratings for accessibility features show an overall satisfaction of 91.67. The study emphasizes the importance of mobile-assisted tasks for inclusive classroom practices and suggests further research on the role of serious games in Task-Based Language Teaching (TBLT). Overall, the research contributes insights into designing inclusive technology-enhanced learning tools for EFL education, demonstrating the potential of serious games in providing accessible content and fostering autonomous and collaborative learning for visually impaired students.


  • Open Access

    Emergency Remote EFL Learning, A Post-Pandemic Analysis of Indonesian and Colombian Students’ Perceptions: A Quantitative Study

    by Karen Villalba, Heydy Robles, Adhan Kholis, Humberto Llinas, Elkin Villanueva

    Objective: Enhancing post-pandemic EFL (English as a Foreign Language) curricula through the incorporation the digital tools in conjunction with blended learning strategies has emerged as a compelling domain of scholarly inquiry in language learning. This study explored students' perceptions of emergency remote EFL learning in two private universities in Indonesia and Colombia, as well as the feedback provided by students towards English courses. Method: A quantitative study was applied. Surveys and focus groups were used to collect data that was analyzed by employing a Multigroup confirmatory factor analysis using R-4.3.1 statistical program and content analysis respectively. Findings: In both nations under examination, prevalent were a multitude of adverse perceptions encompassing challenges pertaining to social engagement, cognitive focus, and technological connectivity. Furthermore, a discernible disparity in the perceptions of Indonesian and Colombian students was evident across a spectrum of survey inquiries, encompassing variances in preferences, comfort levels, and perceptions of instructor comprehension. Implication for Theory and Practice: Integrating social interaction into online learning environments for optimizing foreign language acquisition would be valuable. Conclusion: Student feedback revealed the tech challenges behind courses as well as the emotional impact of neglect by governments in the global South.

  • Open Access

    Emergency Remote EFL Learning, A Post-Pandemic Analysis of Indonesian and Colombian Students’ Perceptions: A Quantitative Study

    by Karen Villalba, Heydy Robles, Adhan Kholis, Humberto Llinas, Elkin Villanueva

    Objective: Enhancing post-pandemic EFL (English as a Foreign Language) curricula through the incorporation the digital tools in conjunction with blended learning strategies has emerged as a compelling domain of scholarly inquiry in language learning. This study explored students' perceptions of emergency remote EFL learning in two private universities in Indonesia and Colombia, as well as the feedback provided by students towards English courses. Method: A quantitative study was applied. Surveys and focus groups were used to collect data that was analyzed by employing a Multigroup confirmatory factor analysis using R-4.3.1 statistical program and content analysis respectively. Findings: In both nations under examination, prevalent were a multitude of adverse perceptions encompassing challenges pertaining to social engagement, cognitive focus, and technological connectivity. Furthermore, a discernible disparity in the perceptions of Indonesian and Colombian students was evident across a spectrum of survey inquiries, encompassing variances in preferences, comfort levels, and perceptions of instructor comprehension. Implication for Theory and Practice: Integrating social interaction into online learning environments for optimizing foreign language acquisition would be valuable. Conclusion: Student feedback revealed the tech challenges behind courses as well as the emotional impact of neglect by governments in the global South.

  • Open Access

    Language learning apps for visually impaired users: a systematic review

    by Heydy Robles, Adriana Perez, Karen Villalba, M.C. Delgado-Cañas, Elkin Villanueva, Conor Keogh, Miguel Jimeno

    The purpose of this literature review is to identify, categorize, and critically appraise research papers related to mobile apps for visually impaired people in language learning. This study intended to identify the language skills, the affordances, and the limitations encountered while designing and implementing the apps. Hence, a systematic review in the Scopus database and the virtual libraries of IEEE, SAGE, ERIC, and Science Direct, adhering to the PRISMA methodology, produced 274 research papers, and after the application of the different phases, a detailed analysis was performed using 17 articles. The results revealed that Information Communication Technologies, assistive technologies, and electronic accessibility features contributed to the usability guidelines and the current evolution toward modern language learning mobile applications for visually impaired users. The revised work also revealed how writing, reading, and spelling became more demanding for this particular special need, and that grammar-based and traditional activities are replaced by other communicative approaches. The emphasis was on speaking and listening skills due to these being less demanding in terms of technical requirements. The findings of this review provide insights for instructional designers to construct inclusive language learning apps which consider the three essential dimensions needed to achieve it: technological, pedagogical and psychological, in addition to appropriate affordances necessary for both sighted and visually impaired users.


  • Top Cited Papers
    Open Access

    A deep-learning-based grading system (ASAG) for reading comprehension assessment by using aphorisms as open-answer-questions

    by Ivan D. Mardini G., Christian G. Quintero M., César A. Viloria N., Winston S. Percybrooks B., Heydy S. Robles N., Karen Villalba R.

    Today reading comprehension is considered an essential skill in modern life, therefore, higher education students require more specific skills to understand, interpret and evaluate texts effectively. Short answer questions (SAQs) are one of the relevant and proper tools for assessing reading comprehension skills. Unlike multiple-choice questions, SAQs allow for the assessment of cognitive abilities such as attention, language, perception, and problem solving. However, the task of SAQs scoring is time-consuming and susceptible to ambiguity. Automatic Short Answer Grading (ASAG) is a new paradigm that could help solve these problems. This experimental analysis aims to implement ASAG using several approaches to sentence embedding based on deep learning with a multilayer perceptron regression layer on the top, trained with a reading comprehension dataset based on aphorisms. For experimental testing, the available dataset is composed of answers given by 199 undergraduate students in Spanish. BERT and Skip-Thought models are tested with different hyperparameters to find the best performance in terms of Pearson correlation coefficient and RMSE against human experts grades. The result of the current study showed that BERT model performed better than other approaches.


  • Open Access

    A collective reflection on doing an autoethnography in online doctoral education

    by Kyungmee Lee, Salwa Al Sulaimi, Thomas Leach, Mary L McDowell Lefaiver, Sophia Mavridi, Regina Obexer, Konstantinos Petsiotis, Karen Villalba