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Dr. Cristian Tejedor-García

currently works as a postdoc researcher at CLST (Radboud University). He also collaborates with the research group ECA-SIMM in the Department of Computer Science at EII - University of Valladolid.
He received both Bachelors and Masters (with honours) degree in Computer Engineering in 2014 and 2016 and his PhD (international mention and cum laude) in Computer Science in 2020.
He is really into automatic speech recogntion, Human-Computer interaction, and learning applications.

What is my current research?

Currently researching new ways to help people to improve their pronunciation of foreign language with speech technology.

HoMed project 2021-2024
ST.CART project 2021-2024
Bachelor's theses (click to show)
Teaching load course 2016/2017: PDI. 4.8 ECTS (S2). Programming Paradigms*: 🐍 L3 and L6.
Teaching load course 2017/2018: PDI. 4.8 ECTS (S2). Programming Paradigms*: 🐍 L4 and L8.
Teaching load course 2018/2019: PDI. 5.4 ECTS (S1 and S2). Computing**: 💻 L2 and Programming Paradigms*: 🐍 L8.
Teaching load course 2019/2020: PDI. 4.8 ECTS (S2). Programming Paradigms*: 🐍 L1 and L5.
Teaching load course 2020/2021: PDI. 8.2 ECTS (S1). Database systems Analysis and Design*: 💾 X2, X3 and X4.
Teaching load course 2021/2022: PDI. 11.0 ECTS Programming for beginners: Python**: 🐍 and (Automatic) Speech Recognition*: 🗣🎤.

*Degree in Computer Engineering, Degree in Statistics and INdat and **Degree in Design Engineering and Product Development (University of Valladolid).


You can also download my applications from some markets or read latest updates at my twitter account.

Publications (September 2021)

  1. Automatic Pronunciation Assessment vs. Automatic Speech Recognition: a Study of Conflicting Conditions for L2-English. Enrique Cámara-Arenas, Cristian Tejedor-García, Cecilia Judith Tomas-Vázquez, David Escudero-Mancebo. Language Learning & Technology, 27(3), 2023.   Copyediting

  2. An ASR-Based Tutor for Learning to Read: How to Optimize Feedback to First Graders. Yu Bai, Cristian Tejedor-García, Ferdy Hubers, Catia Cucchiarini, Helmer Strik. In: Karpov A., Potapova R. (eds) Speech and Computer. SPECOM 2021. Lecture Notes in Computer Science, vol 12997, pp. 58-69. Springer, Cham. Sep. 2021.   DOI: 10.1007/978-3-030-87802-3_6

  3. Automatic Speech Recognition (ASR) Systems Applied to Pronunciation Assessment of L2 Spanish for Japanese Speakers. Cristian Tejedor-García, Valentín Cardeñoso-Payo, David Escudero-Mancebo. Applied Sciences, 11(15), 6695, 21 Jul. 2021.  DOI: 10.3390/app11156695

  4. Performance Comparison of Specific and General-Purpose ASR Systems for Pronunciation Assessment of Japanese Learners of Spanish. Cristian Tejedor-García. Valentín Cardeñoso-Payo, David Escudero-Mancebo. Valladolid, Spain, 24-25 Mar. 2021. pp. 6-10.  DOI: 10.21437/IberSPEECH.2021-2

  5. Design and Evaluation of Mobile Computer-Assisted Pronunciation Training Tools for Second Language Learning: a Ph.D. Thesis Overview Cristian Tejedor-García. Valentín Cardeñoso-Payo, David Escudero-Mancebo. Valladolid, Spain, 24-25 Mar. 2021. pp. 160-164.  DOI: 10.21437/IberSPEECH.2021-35

  6. Design and Evaluation of Mobile Computer-Assisted Pronunciation Training Tools for Second Language Learning. Cristian Tejedor-García. PhD thesis (international mention, cum laude), Dept. Computer Science, University of Valladolid, Valladolid, Spain, Sep. 2020. pp. 160-164.  DOI: 10.35376/10324/43663 (TESEO)

  7. DESIGN AND EVALUATION OF TWO MOBILE COMPUTER-ASSISTED PRONUNCIATION TRAINING TOOLS TO FAVOR AUTONOMOUS PRONUNCIATION TRAINING OF ENGLISH AS A FOREIGN LANGUAGE. Cristian Tejedor-García, Valentín Cardeñoso Payo, and David Escudero-Mancebo. EDULEARN20 Proceedings, pp. 7639-7646, July 2020. DOI: 10.21125/edulearn.2020.1936

  8. Using Challenges to Enhance a Learning Game for Pronunciation Training of English as a Second Language. Cristian Tejedor-García, David Escudero-Mancebo, Valentín Cardeñoso Payo, and César González-Ferreras. IEEE Access, vol. 8, no. 1, pp. 74250-74266, April 2020. DOI: 10.1109/ACCESS.2020.2988406

  9. Assessing Pronunciation Improvement in Students of English Using a Controlled Computer-Assisted Pronunciation Tool. Cristian Tejedor-García, David Escudero-Mancebo, Enrique Cámara-Arenas, César González-Ferreras and Valentín Cardeñoso Payo. IEEE Transactions on Learning Technologies, vol. 13, no. 2, pp. 269-282, March 2020. DOI: 10.1109/TLT.2020.2980261

  10. Estoñol, a computer-assisted pronunciation training tool for Spanish L1 speakers to improve the pronunciation and perception of Estonian vowels. Katrin Leppik and Cristian Tejedor-García. Journal of Estonian and Finno-Ugric Linguistics (ESUKA – JEFUL), vol. 10, no. 1, pp. 89–104, November 2019. DOI: 10.12697/jeful.2019.10.1.05

  11. Improving Pronunciation of Spanish as a Foreign Language for L1 Japanese Speakers with Japañol CAPT Tool. Cristian Tejedor-García, Valentín Cardeñoso-Payo, María J. Machuca, David Escudero-Mancebo, Antonio Ríos and Takuya Kimura. Proceedings of IberSPEECH 2018, pp. 97-101, Barcelona, Spain. November 2018. DOI: 10.21437/IberSPEECH.2018-21

  12. Japañol: a mobile application to help improving Spanish pronunciation by Japanese native speakers. Cristian Tejedor-García, Valentín Cardeñoso-Payo and David Escudero-Mancebo Proceedings of IberSPEECH 2018, p. 157-158, Barcelona, Spain. November 2018.

  13. Design and Evaluation of a Mobile Application for Second Language Pronunciation Training based on Minimal Pairs. Cristian Tejedor-García. Proceedings of SEPLN 2018. XXXIV Congreso Internacional De La Sociedad Española Para El Procesamiento Del Lenguaje Natural, pp. 7-11. Seville, Spain. September 2018.

  14. Japañol, a Computer Assisted Pronunciation Tool for Japanese Students of Spanish Based on Minimal Pairs. Takuya Kimura, Cristian Tejedor-García, María J. Machuca, Antonio Ríos and David Escudero-Mancebo. Proceedings of 2nd International Symposium on Applied Phonetics 2018, Aizu, Japan. September 2018.

  15. Evaluating the Efficiency of Synthetic Voice for Providing Corrective Feedback in a Pronunciation Training Tool Based on Minimal Pairs. Cristian Tejedor-García, David Escudero-Mancebo, César González-Ferreras, Enrique Cámara-Arenas and Valentín Cardeñoso-Payo. Proceedings of SLaTE 2017, pp. 26-30, Stockholm, Sweden. August 2017. DOI: 10.21437/SLaTE.2017-5

  16. Uso De Pares Mínimos En Herramientas Para La Práctica De La Pronunciación Del Español Como Lengua Extranjera. Cristian Tejedor-García and David Escudero-Mancebo. Revista de la Asociación Europea de Profesores de Español. El español por el mundo. pp. 355-363, num. 1, 2018.

  17. TipTopTalk! Mobile application for speech training using minimal pairs and gamification. Cristian Tejedor-García, David Escudero-Mancebo, César González-Ferreras, Enrique Cámara-Arenas and Valentín Cardeñoso-Payo. Proceedings of IberSPEECH 2016, pp. 425-432, Lisbon, Portugal. November 2016. 🏆Best demo award.

  18. Improving L2 Production with a Gamified Computer-Assisted Pronunciation Training Tool, TipTopTalk! Cristian Tejedor-García, David Escudero-Mancebo, César González-Ferreras, Enrique Cámara-Arenas and Valentín Cardeñoso-Payo. Proceedings of IberSPEECH 2016, pp. 177-185, Lisbon, Portugal. November 2016.

  19. Measuring pronunciation improvement in users of CAPT Tool TipTopTalk! Cristian Tejedor-García, David Escudero-Mancebo, Enrique Cámara-Arenas, César González-Ferreras, and Valentín Cardeñoso-Payo. Proceedings of Interspeech 2016, pp. 1178-1179. San Francisco, USA. September 2016.

  20. TipTopTalk!: A game to improve the perception and production of L2 sounds. Andreia Rauber, Cristian Tejedor-García, Valentín Cardeñoso Payo, Enrique Cámara-Arenas, César González-Ferreras, David Escudero-Mancebo, and Anabela Rato. Abstracts of New Sounds Aarhus, 8th International Conference on Second Language Speech, pp. 160, Aarhus, Denmark. June 2016.

  21. Playing around Minimal Pairs to improve pronunciation training. Cristian Tejedor-García, Valentín Cardeñoso-Payo, Enrique Cámara-Arenas, César González-Ferreras and David Escudero-Mancebo. IFCASL Project 2015. Individualized Feedback for Computer-Assisted Spoken Language Learning. Workshop on "Feedback in Pronunciation Training". Saarland, Germany. November 2015.

  22. Implementation and Test of a Serious Game Based on Minimal Pairs for Pronunciation Training. David Escudero-Mancebo, Enrique Cámara-Arenas, Cristian Tejedor-García, César González-Ferreras and Valentín Cardeñoso-Payo. Proceedings of SLaTE 2015, pp. 125-130, Leipzig, Germany. September 2015.

Conference attendances

  1. International conference: "EDULEARN20" 12th International conference on Education and New Learning Technologies. July 6-7, 2020. On-line: https://bit.ly/3tRRVjL [Accessed 13th August 2019].

  2. International workshop: "Nordic-LASI 2019" International workshop - University of Tallinn. Tallinn, Estonia. August 28-30, 2019. On-line: https://lasi2019.tlu.ee/ [Accessed 13th August 2020].

  3. International conference: IberSPEECH 2018. X Jornadas en Tecnologías del Habla and the V Iberian SLTech Workshop events. Barcelona, Spain. November 21-23, 2018. On-line: http://iberspeech2018.talp.cat/ [Accessed 13th October 2018].

  4. International conference: SEPLN 2018. XXXIV Congreso Internacional De La Sociedad Española Para El Procesamiento Del Lenguaje Natural. Seville, Spain. September 19-21, 2018. On-line: https://bit.ly/3dQ4W7N [Accessed 13th October 2018].

  5. International conference: SLaTE 2017. Speech and Language Technology in Education. Djuronaset, Stockholm, Sweden. August 25-26, 2017 On-line: https://www.isca-speech.org/archive/SLaTE_2017/ [Accessed 13th August 2019.

  6. International conference: LII International conference AEPE - Universidad De Las Palmas De Gran Canaria. Las Palmas de Gran Canaria, Las Palmas, Spain. July 24-28, 2017. On-line: https://goo.gl/V2F7uQ [Accessed 13th August 2017].

  7. International conference: IberSPEECH 2016. IX Jornadas en Tecnologías del Habla and the V Iberian SLTech Workshop events. INESC-ID Lisbon, RTTH and SIG-IL. Lisbon, Portugal. November 23-25, 2016. On-line: https://iberspeech2016.inesc-id.pt/index.php/program-at-a-glance/ [Accessed 13th August 2017].

  8. International workshop: The "LASI Spain 2016" International workshop - University of Deusto (UD) and SNOLA (Spanish Network of Learning Analytics). Deusto Campus, Bilbao, Spain. June 27-28, 2016. On-line: http://lasi16.snola.es/ [Accessed 13th August 2017].

  9. National conference: II Jornada de Investigación en Tecnologías de la Información y de las Comunicaciones. Universidad de Valladolid, Valladolid, Spain. April 28, 2016. On-line: https://goo.gl/AQ3h6V [Accessed 13th August 2017]. 🏆Best poster of the session award.

  10. International conference: IFCASL Project 2015. Workshop on "Feedback in Pronunciation Training". Saarbrücken, Germany. November 5-6, 2015. On-line: http://www.ifcasl.org/index.html [Accessed 13th August 2017].

Bachelor theses

  1. [Project direction] Migración de aplicación Android con Google Play Games a API REST - Degree in Computer Engineering - 2021 - J. García Diéguez - Link not available [Ongoing].

  2. [Project direction] Desarrollo de una aplicación educativa multiplataforma para el entrenamiento de la pronunciación de idiomas - Degree in Computer Engineering - 2021 - A. Gamazo Ferrero - Link [Accessed 18th July 2021]].

  3. [Collaboration] ERASMUSAVE: Idea de negocio sostenible para ahorrar dinero durante el periodo Erasmus - Degree in Design Engineering and Product Development - 2020 - L.M. García Riesco. - ERASMUSAVE: Idea de negocio sostenible para ahorrar dinero durante el periodo Erasmus [Accessed 18th December 2020].

  4. [Project direction] API REST para la gestión de partidas multijugador de un juego serio - Degree in Computer Engineering - 2020 - A. de la Maza Valles - Link [Accessed 18th December 2020].

  5. [Project direction] GETEPER: aplicación multiplataforma para la gestión de tests perceptuales de audio - Degree in Computer Engineering (INdat) - 2019 - L. M. Calvo Magaz - Link [Accessed 13th November 2019].

  6. [Project direction] Desarrollo de aplicación para la generación de juegos geográficos a medida - Degree in Computer Engineering - 2019 - C. Gómez Escribano - Link [Accessed 24th October 2019].

  7. [Project direction] Desarrollo de la modalidad multijugador para la aplicación Clash of Pronunciation - Degree in Computer Engineering - 2017 - R. S. Navajas - Link [Accessed 13th July 2018].

  8. [Collaboration] Una solución para las dificultades de acceso al léxico: diseño de la aplicación +NOMIA - Degree in Speech Therapy - 2018 - M. del Mar Valderrábano Yudego - LinkUna solución para las dificultades de acceso al léxico: diseño de la aplicación +NOMIA [Accessed 13th July 2018].

  9. [Collaboration] Stop Bullying - App para la denuncia del acoso escolar - Degree in Design Engineering and Product Development - 2018 - R. Calvo - Stop Bullying - App para la denuncia del acoso escolar [Accessed 13th July 2018].

  10. [Collaboration]  Programación de aplicaciones Android para aprendizaje de Idiomas - Degree in Design Engineering and Product Development - 2018 - A. Colina Fernández - Link [Accessed 6th October 2018].

  11. [Collaboration] La anamorfosis en la realidad aumentada - Degree en Fundamentals of Architecture - 2017 - H. Crespo Aller - LinkVideo La anamorfosis en la realidad aumentada [Accessed 13th July 2018].

  12. [Collaboration] AdaptEye - Master in Chemical Engineering - 2017 - H. Trigueros Fernández - AdaptEye [Accessed 13th July 2018].

  13. [Collaboration] Videojuego serio para la promoción de Valladolid como ciudad para el aprendizaje del español como segunda lengua - Degree in Design Engineering and Product Development - 2017 - V. Yolanda Portero López - Link [Accessed 13th July 2018].

  14. [Collaboration] Los GIF como recurso para la comunicación alternativa y aumentativa. Diseño de un SAAC - Degree in Speech Therapy - 2017 - A. Martín Román - LinkLos GIF como recurso para la comunicación alternativa y aumentativa. Diseño de un SAAC [Accessed 13th July 2018].

  15. [Collaboration] Movilidad urbana sostenible en el municipio de Valladolid - Degree in Geography and Territory Planning - 2015 - N. Prieto Vega - Link [Accessed 13th July 2018].

  16. [Own] TipTopTalk! Aplicación móvil para la mejora de pronunciación multilingüe mediante pares mínimos y gamificación - Masters in Computer Engineering - 2016 - Cristian Tejdor-García - Link [Accessed 13th July 2018].

  17. [Own] Desarrollo de una aplicación para la plataforma social educativa Edmodo - Degree in Computer Engineering - 2014 - Cristian Tejdor-García - Link [Accessed 13th July 2018].

List of my projects and collaborations

5 stars image
Japañol link

Japañollogo

Japañol is a pedagogical application for Android that aims to improve the Spanish pronunciation of native Japanese speakers. Developed at ECA-SIMM laboratory group.

Estoñol link

Estoñollogo

Estoñol is a pedagogical application for Android that aims to improve the Estonian pronunciation of native Spanish speakers. Developed at ECA-SIMM laboratory group.

TipTopTalk! link

TipTopTalk!®logologo

TipTopTalk!® is a serious game for foreign language (L2) pronunciation training with minimal pairs.
Languages: Spanish (ES), American and British English, Simplified Chinese, Brazilian and European Portuguese and German.

🏆Award: Best IberSPEECH'2016 software demo
🏆Award: Prometheus program 2015 of innovation products
🏆Award: Best poster of II Jornadas de Investigación en tecnologías de la información y Comunicaciones (University of Valladolid).
® Intellectual Property Register

Bus Pucela link

Bus Pucelalogologo

This is my first Android application.
Its primary goal is to see Valladolid urban buses times in real time.
It has been downloaded more than 50k times.
Valladolid urban buses real-time news and incidences web.
Valladolid urban buses time-lines web.
Acknowlege in a Bachelor's thesis (University of Valladolid): web.

  • Pucela Project: Web.
  • Fiestas Pucela 2015: Web.
  • Fiestas Pucela 2014: Web.
  • Aptiva: Web.
  • El día de Valladolid: Web.
  • Europa Press: Web.

logo

Bus Pucela Prologologo

The most complete Valladolid urban buses times searcher application. It traces all map routes and it has unlimited time stops desktop widgets.

Mini

Bus Pucela Minilogo

The fastest Valladolid urban buses times searcher application. It has only the basics of an application of this type: favourite stops and a stop searcher.

ur company or to personal use?

Get in touch with me

Get in touch

cristian ․ tejedorgarcia [at] ru • nl

cristian [at] infor ․ uva • es