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Loïs Fournier

Institute of Psychology, University of Lausanne, Lausanne, Switzerland

lois.fournier@unil.ch | Google Scholar | ORCID | ResearchGate

Education

D.Sc. in Psychology (Sep. 2022 – Aug. 2026)

Institute of Psychology, University of Lausanne, Lausanne, Switzerland

M.Sc. in Psychology (Sep. 2019 – Aug. 2021)

Institute of Psychology, University of Lausanne, Lausanne, Switzerland

B.Sc. in Psychology (Sep. 2016 – Aug. 2019)

Institute of Psychology, University of Lausanne, Lausanne, Switzerland

Employment

Swiss National Science Foundation “Doc.CH” Doctoral Research Fellow (Sep. 2022 – Aug. 2026)

Institute of Psychology, University of Lausanne, Lausanne, Switzerland

Supervisor: Prof. Joël Billieux

Co-supervisor I: Prof. Alexandre Heeren

Co-supervisor II: Prof. José C. Perales

Invited Researcher (Mar. 2025 – May 2025)

Mind, Brain, and Behavior Research Center (CIMCYC), Department of Experimental Psychology, University of Granada, Granada, Spain

Supervisor: Prof. José C. Perales

Teaching Assistant (Sep. 2022 – Feb. 2025)

Institute of Psychology, University of Lausanne, Lausanne, Switzerland

Supervisor: Dr. Loïc Chareyron

Research Officer (Jun. 2022 – Aug. 2022)

Institute of Psychology, University of Lausanne, Lausanne, Switzerland

Supervisor: Prof. Elise Dan-Glauser

Invited Researcher (Mar. 2022 – May 2022)

Institute of Psychology, University of Lausanne, Lausanne, Switzerland

Supervisor: Prof. Joël Billieux

Approved research projects

Improving the assessment of impulsivity: a novel psychometric approach

Fournier, L. (Sep. 2022 – Aug. 2026). Improving the assessment of impulsivity: a novel psychometric approach. Swiss National Science Foundation “Doc.CH” Doctoral Research Fellowship [Grant ID: P000PS_211887] [Grant amount: 283,884 CHF]. https://data.snf.ch/grants/grant/211887

Scientific publications

Journal articles

8. Billieux, J., Fournier, L., Rochat, L., Georgieva, I., Eben, C., Malmdorf Andersen, M., King, D. L., Simon, O., Khazaal, Y., Lieberoth, A., & Bloch, J. (2025). Can playing Dungeons and Dragons be good for you? A registered exploratory pilot program using offline tabletop role-playing games to mitigate social anxiety and reduce problematic involvement in multiplayer online video games. Royal Society Open Science, 12(4), 250273. https://doi.org/10.1098/rsos.250273

7. Giardina, A., Fournier, L., Starčević, V., King, D. L., Di Blasi, M., Schimmenti, A., & Billieux, J. (2024). From active escapism to virtual withdrawal: validation of the Compensatory-Dissociative Online Gaming scales (C-DOGs). Journal of Behavioral Addictions, 13(4), 1028–1050. https://doi.org/10.1556/2006.2024.00059

6. Fournier, L., Bőthe, B., Demetrovics, Z., Koós, M., Kraus, S. W., Nagy, L., Potenza, M. N., Ballester-Arnal, R., Batthyány, D., Bergeron, S., Briken, P., Burkauskas, J., Cárdenas-López, G., Carvalho, J., Castro-Calvo, J., Chen, L., Ciocca, G., Corazza, O., Csako, R. I., Fernandez, D. P., Fujiwara, H., Fernandez, E. F., Fuss, J., Gabrhelík, R., Gewirtz-Meydan, A., Gjoneska, B., Gola, M., Grubbs, J. B., Hashim, H. T., Saiful Islam, Md., Ismail, M., Jiménez-Martínez, M. C., Jurin, T., Kalina, O., Klein, V., Költő, A., Lee, S.-K., Lewczuk, K., Lin, C.-Y., Lochner, C., López-Alvarado, S., Lukavská, K., Mayta-Tristán, P., Miller, D. J., Orosová, O., Orosz, G., Ponce, F. P., Quintana, G. R., Quintero Garzola, G. C., Ramos-Diaz, J., Rigaud, K., Rousseau, A., De Tubino Scanavino, M., Schulmeyer, M. K., Sharan, P., Shibata, M., Shoib, S., Sigre-Leirós, V., Sniewski, L., Spasovski, O., Steibliene, V., Stein, D. J., Strizek, J., Tsai, M.-C., Ünsal, B. C., Vaillancourt-Morel, M.-P., Van Hout, M. C., & Billieux, J. (2024). Evaluating the factor structure and measurement invariance of the 20-item short version of the UPPS-P Impulsive Behavior Scale across multiple countries, languages, and gender identities. Assessment, 10731911241259560. https://doi.org/10.1177/10731911241259560

5. Fournier, L., Schimmenti, A., Musetti, A., Boursier, V., Flayelle, M., Cataldo, I., Starčević, V., & Billieux, J. (2024). Further evidence for the bidimensionality of the components model of addiction: a reply to Amendola (2023). Addictive Behaviors, 150, 107914. https://doi.org/10.1016/j.addbeh.2023.107914

4. Fournier, L., Schimmenti, A., Musetti, A., Boursier, V., Flayelle, M., Cataldo, I., Starčević, V., & Billieux, J. (2023). Deconstructing the components model of addiction: an illustration through “addictive” use of social media. Addictive Behaviors, 143, 107694. https://doi.org/10.1016/j.addbeh.2023.107694

3. Bőthe, B., Koós, M., Nagy, L., Kraus, S. W., Demetrovics, Z., Potenza, M. N., Michaud, A., Ballester-Arnal, R., Batthyány, D., Bergeron, S., Billieux, J., Briken, P., Burkauskas, J., Cárdenas-López, G., Carvalho, J., Castro-Calvo, J., Chen, L., Ciocca, G., Corazza, O., Csako, R., Fernandez, D. P., Fernandez, E. F., Fournier, L., Fujiwara, H., Fuss, J., Gabrhelík, R., Gewirtz-Meydan, A., Gjoneska, B., Gola, M., Grubbs, J. B., Hashim, H. T., Islam, Md. S., Ismail, M., Jiménez-Martínez, M. C., Jurin, T., Kalina, O., Klein, V., Költő, A., Lee, C.-T., Lee, S.-K., Lewczuk, K., Lin, C.-Y., Lochner, C., López-Alvarado, S., Lukavská, K., Mayta-Tristán, P., Milea, I., Miller, D. J., Orosová, O., Orosz, G., Ponce, F. P., Quintana, G. R., Quintero Garzola, G. C., Ramos-Diaz, J., Rigaud, K., Rousseau, A., De Tubino Scanavino, M., Schulmeyer, M. K., Sharan, P., Shibata, M., Shoib, S., Sigre Leirós, V. L., Sniewski, L., Spasovski, O., Steibliene, V., Stein, D. J., Strizek, J., Štulhofer, A., Ünsal, B. C., & Vaillancourt-Morel, M.-P. (2023). Compulsive sexual behavior disorder in 42 countries: insights from the International Sex Survey and introduction of standardized assessment tools. Journal of Behavioral Addictions, 12(2), 393–407. https://doi.org/10.1556/2006.2023.00028

2. Billieux, J., & Fournier, L. (2023). Commentary on Karhulahti et al. (2022): addressing ontological diversity in gaming disorder measurement from an item-based psychometric perspective. Addiction Research & Theory, 31(3), 170–173. https://doi.org/10.1080/16066359.2022.2125508

1. Eben, C., Fournier, L., Verbruggen, F., & Billieux, J. (2023). Modeling urgency in the lab: exploring the associations between self-reported urgency and behavioral responses to negative outcomes in laboratory gambling. Acta Psychologica, 234, 103849. https://doi.org/10.1016/j.actpsy.2023.103849

Conference proceedings

7. Billieux, J., Bloch, J., Rochat, L., Fournier, L., Georgieva, I., Eben, C., Andersen, M. M., King, D. L., Simon, O., Khazaal, Y., & Lieberoth, A. (2024). A registered exploratory pilot program using offline Tabletop Role-Playing Games (TTRPGs) to reduce social anxiety and problematic involvement in multiplayer online video games. Journal of Behavioral Addictions, 13(Supplement-1), 180. https://doi.org/10.1556/2006.2024.00900

6. Fournier, L., Bőthe, B., Demetrovics, Z., Koós, M., Kraus, S. W., Nagy, L., Potenza, M. N., & Billieux, J. (2024). Do we understand impulsivity the same way across different countries of residence, languages, and gender identities? Journal of Behavioral Addictions, 13(Supplement-1), 148. https://doi.org/10.1556/2006.2024.00900

5. Giardina, A., Schimmenti, A., Fournier, L., Starčević, V., Di Blasi, M., King, D. L., & Billieux, J. (2024). From active escapism to virtual withdrawal: validation of the Compensatory-Dissociative Online Gaming scales (C-DOGs). Journal of Behavioral Addictions, 13(Supplement-1), 202. https://doi.org/10.1556/2006.2024.00900

4. Billieux, J., Bloch, J., Rochat, L., Fournier, L., Georgieva, I., Eben, C., Andersen, M. M., King, D. L., Simon, O., Khazaal, Y., & Lieberoth, A. (2023). Can playing Dungeons and Dragons be good for you? Tabletop Role-Playing Games to mitigate social anxiety and reduce problematic gaming. Journal of Behavioral Addictions, 12(Supplement1), 8. https://doi.org/10.1556/2006.2023.00800

3. Fournier, L., Billieux, J., Augsburger, N., Salamon, N., Rochat, L., & Dan-Glauser, E. (2023). Do hoarding symptoms belong to the obsessive-compulsive spectrum? Evidence from a psychometric network approach. Journal of Behavioral Addictions, 12(Supplement-1), 346. https://doi.org/10.1556/2006.2023.00800

2. Fournier, L., Schimmenti, A., Musetti, A., Boursier, V., Flayelle, M., Cataldo, I., Starčević, V., & Billieux, J. (2023). Challenging the components model of addiction: An illustration through “addictive” use of social media. Journal of Behavioral Addictions, 12(Supplement-1), 183. https://doi.org/10.1556/2006.2023.00800

1. Nuyens, F., Fournier, L., & Billieux, J. (2023). Are gaming disorder diagnostic tools based on the DSM-5 framework conflating core and peripheral addiction criteria? Journal of Behavioral Addictions, 12(Supplement-1), 179. https://doi.org/10.1556/2006.2023.00800

Computer software

1. Fournier, L., Heeren, A., Baggio, S., Clark, L., Verdejo-García, A., Perales, J. C., & Billieux, J. (2025). shortr: Optimal Subset Identification in Undirected Weighted Network Models (Version 1.0.1) [Computer software]. https://doi.org/10.32614/CRAN.package.shortr

Dissertations

1. Fournier, L. (2021). Development of a revised short French version of the UPPS-P Impulsive Behavior Scale [Master dissertation]. Institute of Psychology, University of Lausanne, Lausanne, Switzerland. https://serval.unil.ch/fr/notice/serval:BIB_S_32844

Participation in academic events

Conferences

18. Fournier, L., Billieux, J., Brevers, D., & Heeren, A. (2025, May 15–16). Slow and open science : enjeux, pratiques, et défis [In-person conference oral presentation]. 20th Congress of the Groupe de Réflexion en Psychopathologie Cognitive (GREPACO), Lyon, France.

17. Fournier, L., Bőthe, B., Demetrovics, Z., Koós, M., Kraus, S. W., Nagy, L., Potenza, M. N., International Sex Survey Consortium, & Billieux, J. (2024, November 18–22). Are our impulsive behaviors comparable across different countries of residence, languages, and gender identities? [In-person conference oral presentation]. Cross-Cultural Perspectives in Developing and Implementing Psychological Assessments, Lausanne, Switzerland.

16. Billieux, J., Fournier, L., Rochat, L., Georgieva, I., Eben, C., Malmdorf Andersen, M., King, D. L., Simon, O., Khazaal, Y., Lieberoth, A., & Bloch, J. (2024, October 23–25). A pilot program using tabletop roleplaying games to reduce social anxiety and addiction symptoms in online gamers [In-person conference oral presentation]. 5th European Conference on Addictive Behaviors and Dependencies (Lisbon Addictions), Lisbon, Portugal.

15. Ciudad-Fernández, V., Escriva-Martínez, T., Zarco Alpuente, A., Fournier, L., Billieux, J., & Baños, R. (2024, September 26–28). Desmontando el mito: ¿son la saliencia y la tolerancia el “talón de Aquiles” del uso problemático de las redes sociales? [In-person conference oral presentation]. 6th International Congress and 51st National Conference of the Sociedad Científica Española de Estudios sobre el Alcohol, el Alcoholismo y las otras Toxicomanías (SOCIDROGALCOHOL), Valencia, Spain.

14. Fournier, L., Bőthe, B., Demetrovics, Z., Koós, M., Kraus, S. W., Nagy, L., Potenza, M. N., International Sex Survey Consortium, & Billieux, J. (2024, July 8–10). Do we understand impulsivity the same way across different countries of residence, languages, and gender identities? [In-person conference oral presentation]. 9th International Conference on Behavioral Addictions (ICBA), Gibraltar, Gibraltar.

13. Giardina, A., Schimmenti, A., Fournier, L., Starčević, V., Di Blasi, M., King, D. L., & Billieux, J. (2024, July 8–10). From active escapism to virtual withdrawal: validation of the Compensatory-Dissociative Online Gaming Scale (C-DOGs) [In-person conference oral presentation]. 9th International Conference on Behavioral Addictions (ICBA), Gibraltar, Gibraltar.

12. Billieux, J., Bloch, J., Rochat, L., Fournier, L., Georgieva, I., Eben, C., Khazaal, Y., Simon, O., Malmdorf Andersen, M., King, D. L., & Lieberoth, A. (2024, July 8–10). A registered exploratory pilot program using offline Tabletop Role-Playing Games (TTRPGs) to reduce social anxiety and problematic involvement in multiplayer online video games [In-person conference oral presentation]. 9th International Conference on Behavioral Addictions (ICBA), Gibraltar, Gibraltar.

11. Billieux, J., Bloch, J., Rochat, L., Fournier, L., Khazaal, Y., & Simon, O. (2024, May 30–31). Approches ludiques innovantes dans les champs de la prévention et de l’intervention psychologique : illustration dans le cadre d’une étude pilote menée à l’Université de Lausanne [In-person conference oral presentation]. 19th Congress of the Groupe de Réflexion en Psychopathologie Cognitive (GREPACO), Toulouse, France.

10. Fournier, L., Billieux, J., Augsburger, N., Rochat, L., Salamon, N., & Dan-Glauser, E. (2024, May 30–31). Les symptômes liés au trouble d’accumulation compulsive s’inscrivent-ils dans le spectre des symptômes liés au trouble obsessionnel-compulsif? [In-person conference poster presentation]. 19th Congress of the Groupe de Réflexion en Psychopathologie Cognitive (GREPACO), Toulouse, France.

9. Billieux, J., Bloch, J., Rochat, L., Fournier, L., Khazaal, Y., & Simon, O. (2024, May 13–17). Donjons et Dragons: un potentiel outil thérapeutique? Atelier pratique et expérientiel [In-person conference oral presentation]. 91st Congress of the ACFAS, Ottawa, Canada.

8. Fournier, L., Billieux, J., Augsburger, N., Rochat, L., Salamon, N., & Dan-Glauser, E. (2023, August 23–25). Do hoarding symptoms belong to the obsessive-compulsive spectrum? Evidence from a psychometric network approach [In-person conference poster presentation]. 8th International Conference on Behavioral Addictions (ICBA), Incheon, South Korea.

7. Fournier, L., Schimmenti, A., Musetti, A., Boursier, V., Flayelle, M., Cataldo, I., Starčević, V., & Billieux, J. (2023, August 23–25). Challenging the components model of addiction: an illustration through “addictive” use of social media [In-person conference oral presentation]. 8th International Conference on Behavioral Addictions (ICBA), Incheon, South Korea.

6. Nuyens, F., Fournier, L., & Billieux, J. (2023, August 23–25). Are gaming disorder diagnostic tools based on the DSM-5 framework conflating core and peripheral addiction criteria? [In-person conference oral presentation]. 8th International Conference on Behavioral Addictions (ICBA), Incheon, South Korea.

5. Billieux, J., Bloch, J., Rochat, L., Fournier, L., Georgieva, I., Eben, C., Khazaal, Y., Simon, O., Malmdorf Andersen, M., King, D. L., & Lieberoth, A. (2023, August 23–25). Can playing Dungeons and Dragons be good for you? Tabletop Role-Playing Games to mitigate social anxiety and reduce problematic gaming [In-person conference oral presentation]. 8th International Conference on Behavioral Addictions (ICBA), Incheon, South Korea.

4. Billieux, J., Bloch, J., Rochat, L., Fournier, L., Georgieva, I., Eben, C., Khazaal, Y., Simon, O., Malmdorf Andersen, M., King, D. L., & Lieberoth, A. (2023, May 22–23). Du jeu « online » au jeu « offline » – un programme pilote pour réduire l’usage excessif des jeux vidéo [In-person conference oral presentation]. 18th Congress of the Groupe de Réflexion en Psychopathologie Cognitive (GREPACO), Louvain-la-Neuve, Belgium.

4. Fournier, L., Perales, J. C., Heeren, A., & Billieux, J. (2023, May 22–23). Moins de questions, moins d’information(s)? Regard nouveau sur les versions courtes de questionnaires [In-person conference oral presentation]. 18th Congress of the Groupe de Réflexion en Psychopathologie Cognitive (GREPACO), Louvain-la-Neuve, Belgium.

3. Eben, C., Fournier, L., Verbruggen, F., & Billieux, J. (2022, June 2–3). Exploring individual differences in behavioral responses to suboptimal outcomes [In-person conference poster presentation]. 75th Annual Meeting of the Belgian Association of Psychological Sciences (BAPS), Leuven, Belgium.

2. Fournier, L., Schimmenti, A., Musetti, A., Boursier, V., Flayelle, M., Cataldo, I., Starčević, V., & Billieux, J. (2022, May 30–31). Déconstruire le modèle en composantes de l’addiction comportementale : une illustration dans le contexte de l’utilisation addictive des médias sociaux [In-person conference oral presentation]. 17th Congress of the Groupe de Réflexion en Psychopathologie Cognitive (GREPACO), Lausanne, Switzerland.

1. Fournier, L., Golay, P., Rochat, L., Eben, C., & Billieux, J. (2021, May 31–June 1). Développement d’une échelle courte révisée francophone UPPS-P mesurant les traits impulsifs : une étude pré-enregistrée [Online conference oral presentation]. 16th Congress of the Groupe de Réflexion en Psychopathologie Cognitive (GREPACO), Caen, France.

Seminars

4. Fournier, L. (2025, February 10). How to (better) assess impulsive behaviors? [In-person seminar oral presentation]. Cognition and Affect Regulation Laboratory (CARLA), University of Lausanne, Lausanne, Switzerland.

3. Fournier, L. (2022, March 9). Improving the assessment of impulsivity: a network approach [In-person seminar oral presentation]. Stress and Anxiety Research Laboratory (STARlab), Catholic University of Louvain-la-Neuve, Louvain-la-Neuve, Belgium.

2. Fournier, L. (2022, February 14). Using psychological networks with psychometric and behavioral data [Online seminar oral presentation]. Cognition, Behavior, and Ecology Laboratory (CoBE), University of Ghent, Ghent, Belgium.

1. Fournier, L. (2021, November 29). Improving the assessment of impulsivity: a novel psychometric approach [In-person seminar oral presentation]. Cognition and Affect Regulation Laboratory (CARLA), University of Lausanne, Lausanne, Switzerland.

Supervision of junior researchers

Co-director

1. Georgieva, I. (2025). L’impact des jeux de rôle sur table (TTRPGs) sur le concept de soi chez des joueurs de jeux video socialement anxieux [Master dissertation]. Institute of Psychology, University of Lausanne, Lausanne, Switzerland.

Expert

1. Martínez, N. (2023). Investigation de la structure du PID-5 à travers des analyses factorielles et en réseau [Master dissertation]. Institute of Psychology, University of Lausanne, Lausanne, Switzerland.

Teaching activities

Practical Work in Methodology I (Sep. 2022 – Feb. 2025)

B.Sc. in Psychology (28 hours per semester – 140 hours total), University of Lausanne, Lausanne, Switzerland

Tests and Assessment Methods in Psychology and Psychopathology (Dec. 2024)

B.Sc. in Psychology (56 hours per semester – 4 hours total), University of Lausanne, Lausanne, Switzerland

Active membership in scientific committees

Associate editor

1. Swiss Psychology Open

Ad-hoc reviewer

7. BMC Psychology

6. International Journal of Mental Health and Addiction

5. Addictive Behaviors

4. Cyberpsychology: Journal of Psychosocial Research on Cyberspace

3. Journal of Behavioral Addictions

2. Clinical Neuropsychiatry

1. Journal of Homosexuality

Active membership in scientific societies

Active member

4. American Psychological Association (APA)

3. Swiss Psychological Society (SPS)

2. International Society for the Study of Behavioral Addictions (ISSBA)

1. Groupe de Réflexion en Psychopathologie Cognitive (GREPACO)

Organization of academic events

Adolescent Health and Digital Behaviors (AHDB)

Adolescent Health and Digital Behaviors (AHDB) [Organizing committee member], Lausanne, Switzerland (2024, June 25).

17th Congress of the Groupe de Réflexion en Psychopathologie Cognitive (GREPACO)

17th Congress of the Groupe de Réflexion en Psychopathologie Cognitive (GREPACO) [Organizing committee member], Lausanne, Switzerland (2022, May 30–31).

Awards

Swiss National Science Foundation “Doc.CH” Doctoral Research Fellowship

Award for the best in-person conference poster presentation

Fournier, L., Billieux, J., Augsburger, N., Rochat, L., Salamon, N., & Dan-Glauser, E. (2024, May 30–31). Les symptômes liés au trouble d’accumulation compulsive s’inscrivent-ils dans le spectre des symptômes liés au trouble obsessionnel-compulsif? [In-person conference poster presentation]. 19th Congress of the Groupe de Réflexion en Psychopathologie Cognitive (GREPACO), Toulouse, France.

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