Jean-Paul Snijder

Jean-Paul Snijder

Postdoctoral Researcher

Heidelberg University

Cognitive Psychometrician

I am a postdoctoral researcher specializing in measurement of cognitive abilities in Jan Rummel’s lab at the University of Heidelberg. My research primarily focuses on exploring individual differences in cognitive control and advancing psychometric practices. I am also actively involved in developing emerging statistical methodologies, particularly in Bayesian statistics, and am committed to making these advancements freely accessible through software tools and open science practices. As an avid R user, I find it invaluable for analysis, visualization, and script automation, especially for maintaining high standards of reproducibility, accountability, and shareability. A significant aspect of my training revolves around the theory of cognition, where I advocate for research that is not only theory-based but also demonstrates psychometric rigor. My goal is to continue contributing to cognitive research through innovative methods and rigorous theoretical frameworks.

Interests

  • Psychometrics
  • Working Memory Capacity
  • Attentional Control
  • Cognitive Modeling
  • Bayesian Modeling
  • Dynamic Structural Equation Models
  • Measurement

Education

  • Postdoctoral Researcher, 2021 - 2025

    Heidelberg University

  • Ph.D. in Cognitive Psychology, 2021

    Claremont Graduate University

  • M.A. in Cognitive Psychology, 2018

    Claremont Graduate University

  • B.A. in Psychological Science, 2014

    Azusa Pacific University

Publications

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Academic & Teaching Experience

 
 
 
 
 

Postdoctoral Researcher

University of Heidelberg

Jan 2021 – Jan 2024 Heidelberg, Germany

Working in the Experimental Psychology and Cognitive Control (Self-Regulation) lab with Jan Rummel. Continuing research on individual differences in cognitive abilities measurement. Teaching seminars with topics in Working Memory, Cognitive Control, and Psychometrics. Duties:

  • Research (50%)
  • Teaching (50%)
 
 
 
 
 

Lecturer

California State University, Los Angeles

Aug 2019 – Dec 2019 Los Angeles, California
Taught Abnormal Psychology (a 300/3000/Junior-level course). In addition to standard coverage of the course, I facilitated class discussion from a more cognitive perspective (e.g., cognitive deficits from mental disorders). Student evaluations are available upon request.
 
 
 
 
 

Teaching Assistant

Claremont Graduate University

Jan 2018 – May 2018 Claremont, California
Assisted Dr. Conway in his Thinking and Reasoning seminar. Facilitated weekly meetings with students regarding literature readings, class discussion, assignments, and research project papers. Student evaluations are available upon request.
 
 
 
 
 

Conway Lab Manager

CALIBER Lab

Jun 2016 – Jun 2020 Claremont, California

Additional Notes:

  • Executed lab start-up
  • In charge of data infrastructure maintenance
  • Lab finances & administration
 
 
 
 
 

Post-Baccalaureate Research Position

Azusa Pacific University

Sep 2014 – May 2015 Azusa, California
Project 1: Dr. Marsh - Bilingualism and priming research
Data collection and analysis, conference presentation
Project 2: Dr. Yu - Advanced statistical method exploration of global education & well-being data
Data collection and analysis, conference presentation, manuscript preparation

Projects

RStudio Theme - Dutch Delight

A color scheme for RStudio; downloadable here. See image for a preview.

Clean as a whistleR

whistleR is currently a combination of pre-process functions, and soon a package to streamline the cleaning of data. The main goal of these functions is to safe time when cleaning data.

Skillset

Cognitive Science

Teaching Experience

Cal State L.A./Heidelberg University

Individual Differences

Open Science

OSF

Measurement

Coding

basic: LaTeX, Python

R/Rstudio

tidyverse

Visualization

ggplot2, JMP, Tableau

SEM

IRT

novice

Bayesian Statistics

Beginner Photography

leisure

Contact