Soutenance de thèse Julia ElKallassi - 19 juillet 2024

Soutenance de thèse Julia ElKallassi - 19 juillet 2024

by Julia ElKallassi

Life & Natural Systems Education JNEducationJNMHigher education, tertiary education
🎙 Julia ElKallassi 👥 783 📅 November 26, 2025 ⏱ 34 min 👁 132 📄 original study 🧭 2026-08-15
Available in: English (current) Français

Keywords

victimizationinternalizing symptomsexternalizing symptomsruminationself-efficacy

Summary

This video is a recording of Julia ElKallassi’s PhD thesis defense, held on July 19, 2024, at the LPNC laboratory. The research investigates the links between peer victimization and internalized/externalized symptoms, focusing on the mediating roles of rumination and self-efficacy. The presentation begins with a theoretical overview of school bullying, highlighting definitions by Olweus, Pikas, and Piquet, and the bidirectional relationship between victimization and psychological symptoms. A systematic literature review was conducted, leading to three empirical studies. Study 1 validated a French version of the Self-Efficacy Questionnaire for Children (SEQ-C), resulting in an 18-item version with good psychometric properties. Study 2a replicated known associations in a French sample, showing that victims have higher internalizing/externalizing symptoms and rumination, and lower self-efficacy. Study 2b used longitudinal data to examine changes over time, finding that victimization predicts later internalizing symptoms directly, while externalizing symptoms predict later victimization through rumination and self-efficacy. Study 3 was a pilot intervention using the ‘Shared Concern’ method, showing preliminary improvements in victimization and psychological symptoms. The defense concludes with practical implications, limitations, and future research directions.

178 words

Critical Evaluation

Value of the Information & Strength of the Argument

The value of the information is high, as it presents original empirical research addressing a significant social issue. The argumentation is solid, grounded in a systematic literature review and rigorous statistical analyses. The researcher clearly explains hypotheses, methods, and results, and discusses both direct and indirect effects. The longitudinal design and the inclusion of a pilot intervention add strength to the conclusions. However, the small sample size in the intervention study and the reliance on self-report measures are limitations that are acknowledged.

Scientific Rigor, Source Quality, Title Accuracy

The scientific rigor is evident through the use of validated instruments, peer-reviewed references, and appropriate statistical methods. The sources cited include meta-analyses and key studies in the field. The title accurately reflects the content, as the video is a thesis defense presentation. The adequacy between title and content is high, with no misleading elements.

151 words

Title / Content Match

The title accurately reflects the content, which is a thesis defense presentation.

Quality & Reliability

8/10

The thesis defense presents original research with a systematic review, psychometric validation, and longitudinal analyses, supported by peer-reviewed references and rigorous methodology.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

  • Reijntjes et al., 2010 — Meta-analysis on victimization and internalizing symptoms
  • Zych et al., 2015 — Meta-analysis on victimization and internalizing/externalizing symptoms
  • Reijntjes et al., 2011 — Meta-analysis on victimization and externalizing symptoms
  • Juvonen & Graham, 2014 — Discussion on mediators in victimization-symptom link
  • Muris, 2001 — Original Self-Efficacy Questionnaire for Children

Concurring Sources

  • Reijntjes et al., 2010 — Meta-analysis supporting bidirectional link between victimization and internalizing symptoms
  • Zych et al., 2015 — Meta-analysis supporting associations with both internalizing and externalizing symptoms

Dissenting Sources

  • No discordant sources — No conflicting sources were mentioned in the video.

Contribution & Novelties

The thesis contributes to the literature by validating a French version of the SEQ-C, providing a longitudinal analysis of victimization and symptoms, and testing a school-based intervention. It highlights the mediating roles of rumination and self-efficacy, offering potential targets for intervention.

Pour aller plus loin :

73 words

Radar Profile

The radar profile shows high scores in information quantity, quality, and reliability, with a slightly lower technical level, indicating a well-balanced presentation suitable for an academic audience.

Reliability 8/10

💬 No comments were provided for analysis.