| Country and Date of Birth: | The Netherlands, 17 December 1990 |
| Address: | Laan van Meerdervoort 84-14, 2517AP The Hague, NL |
| Phone: | 0 (0 31) 6 25 21 56 90 |
| email: | lennertgroot@icloud.com |
| Links: | ORCID; LinkedIn; GitHub |
| Current | 4th year PhD Candidate at University of Amsterdam |
| Jan 2022 | Research Institute of Child Development and Education, Methods & Statistics Programme Group |
| PhD candidate in research project that aims to broaden the scope of research questions that can be answered through meta-analytical structural equation modeling (MASEM). In particular, I investigate the possibilities of synthesizing raw datasets, instead of summary statistics, when conducting MASEM. Also I was involved in teaching several statistics courses (see ’Teaching’) | |
| 2021-2022 | Vrije Universiteit, Amsterdam |
| Tutorial Teacher in the Bachelor Programme of Psychology. I taught different courses (see ’Teaching’) to groups of first and second year Psychology and Pedagogical Sciences students. | |
| 2018 | University of Amsterdam |
| Student Assistant. Translating and implementing an American anti-bullying intervention into the Dutch language and context. | |
| 2018-2021 | University of Amsterdam, Faculty of Behavioural and Social Sciences |
| Master of Research, Child Development and Communication | |
| Research Internship (Research Institute of Child Development and Education, Programme Group Psychopathology): "Developing the Early Shyness Inventory: A Scale Measuring Positive and Negative Shyness". I investigated the measurement of social behavior and shyness among young children (Grade 8.0). | |
| Master Thesis: "Bi-Factor Modelling of Intelligence – Smart?". Conducting a simulation study, I investigated a novel possible explanation for the statistical edge that the bi-factor model has in explaining intelligence data, as compared to the higher-order factor model (Grade 8.1). | |
| 2018 | Korea University, Seoul, South Korea |
| International Summer Campus | |
| International exchange programme of educational and cultural content. I completed the course Advanced Developmental Psychopathology (Grade A+). | |
| 2016-2018 | University of Amsterdam |
| Bachelors Degree, Pedagogical Sciences | |
| Bachelor Thesis: Parenting Skills of Schizophrenic Parents (Grade 8.0). | |
| Research Practice: Developing a parent-report measure for shyness in young children (Grade 8.0). | |
| 2010-2016 | University of Amsterdam |
| Propaedeutical Diploma, Universitaire PABO | |
| University of Amsterdam | Role: Teaching Assistant |
| Program: Child Development and Education (research master) | |
| Course: ’Methods and Statistics in Educational Research’ 12EC | |
| Course ’Structural Equation Modeling in Educational Research’ 12EC | |
| Program: Pedagogical Sciences: Youth at Risk (master track) | |
| Course: ’Masterclass in Methods and Statistics’ 3EC | |
| VU Amsterdam | Role: Tutorial Teacher |
| Program: Bachelor Program Psychology | |
| Course: ’Methodology’ 6EC | |
| Course: ’Measurement and Diagnostics’ 6EC | |
| Course: ’Neuropsychology’ 6EC |
| Groot, L.J., Kan, K.J., & Jak, S. Making the Most of Minimal Data: IPD MASEM via Parameter Moderation Using OpenMx (manuscript under review) | |
| 2025 | Groot, L.J., Kan, K.J., & Jak, S. Does Cluster-Robust Estimation Provide Within-Study Effects? A Comparison of Individual participant Data Methods in MASEM. Structural Equation Modeling: A Multidisciplinary Journal, 32(5), pp. 801-813 https://doi.org/10.1080/10705511.2025.2505995 |
| 2025 | Rode, J.B., Remshard, M., Groot, L.J. & Van der Linden, S., A Meta-Analytic SEM of the Gateway Belief Model (GBM): Highlighting Scientific Consensus Increases Support for Public Action on Climate Change. Current Opinion in Behavioral Sciences, 63:101521, https://doi.org/10.1016/j.cobeha.2025.101521 |
| 2024 | Kan, K.J., Psychogyiopoulos, A., Groot, L.J., De Jonge, H., & Ten Hove, D., 2024. Why do bi-factor models outperform higher-order g factor models? A network perspective Journal of Intelligence, 12(2), 18. https://doi.org/10.3390/jintelligence12020018 |
| 2024 | Groot, L.J., Kan, K.J., & Jak, S., 2024. Checking the Inventory: Illustrating different methods for individual |
| participant data meta-analytic structural equation modeling. Research Synthesis Methods 15(6) pp. 872-895. https://doi.org/10.1002/jrsm.1735 |
| 2025 | Individual Oral Presentation |
| Annual Meeting of the Society for Reseach Synthesis Methodology, Madison WI, USA | |
| 2025 | Technology Demonstration on using JASP for statistical analysis |
| Kohnstamm Institute, Amstelveen, Netherlands | |
| 2024 | Organizing Committee & Research Symposium |
| Annual Meeting of the Society for Reseach Synthesis Methodology, Amsterdam, Netherlands | |
| 2024 | Individual Oral Presentations |
| Meeting of the Working Group Structural Equation Modeling, Enschede, Netherlands | |
| IOPS Winter Conference, CBS The Hague, Netherlands | |
| 2023 | Individual Oral Presentations |
| 4th Symposium on Research Synthesis & Big Data, Frankfurt/Main, Germany | |
| Annual Conference of the European Association of Methodology, Gent, Belgium | |
| 2023 | Poster Presentation |
| IOPS Summer Conference, Tilburg, Netherlands | |
| 2022 | Individual Oral Presentation |
| International Meeting of the Psychometric Society 2022, Bologna, Italy |
| 2022 | IOPS - What is Psychometrics 2EC |
| 2022 | University of Amsterdam - Data Analysis and Visualization in Python 1EC |
| 2023 | IOPS - Mathematical Statistics 1EC |
| 2024 | Utrecht University - Bayesian Statistics 2EC |
| 2025 | Maastricht University - Advanced Meta-Analysis 1EC |
| Dutch: | Primary Fluency | Python | ◼◼□□□ | |
| English: | Full Professional Proficiency | HTML/CSS | ◼◼□□□ | |
| German: | Elementary proficiency | Markdown/Bookdown | ◼◼◼□□ | |
| French: | Elementary proficiency | SPSS | ◼◼◼□□ | |
| LaTeX | ◼◼◼◼□ | |||
| R | ◼◼◼◼□ |
Reading, Rock Climbing, Running, Hiking, Ice/Inline Skating.