Hello, I’m Jeff Stevens.
Data Science and Decision Making

I am a Susan J. Rosowski Associate Professor in the Department of Psychology and the Center for Brain, Biology & Behavior at the University of Nebraska-Lincoln, where I direct the Adaptive Decision Making Lab. I am also a Data Science Mentor at RStudio Academy.

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Who am I?

I train the next generation of data scientists. As a professor, I have trained hundreds of undergraduates, dozens of graduate students, and even several other faculty in how to think about, analyze, visualize, and report their data.

My area of focus uses data science to understand decision making by integrates biology, psychology, computer science, neuroscience, and economics. I employ open science practices to ensure that my work is transparent, accessible, and reproducible.



Data Science and Visualization in R

This course introduces students to the fundamental concepts and methods used in the R statistical software package to prepare, visualize, and disseminate data.

GitHub repository
Data Science and Visualization in R


This R package facilitates checking for, marking, and excluding rows of data frames for common exclusion criteria found in online data surveys from Qualtrics.

Package website
May 2022 - present
Data Science Mentor
Aug 2017 - present
Associate Professor
University of Nebraska-Lincoln
Aug 2011 - Jul 2017
Assistant Professor
University of Nebraska-Lincoln
Jun 2006 - Jun 2011
Research Scientist
Max Planck Institute for Human Development


Over 12 years of experience using R to analyze and visualize data and Sweave/R Markdown to report my research. I teach courses and workshops on using R for data science and developing reproducible workflows.

Download My Resume View My Academic CV


University of Minnesota
Ph.D. in Ecology, Evolution, and Behavior
Baylor University
B.S. in Biology and Environmental Studies


I can really tell that Jeff put A LOT of work into this course. He created lots of course learning materials and tools that were invaluable to learning R and about data wrangling and visualization.



Data Science and Visualization in R student

Everything we do in this class is an active learning opportunity. There a ton of in class questions which really help up think about what he have already learned and what we are currently learning.



Data Science and Visualization in R student

It's always clear that Jeff cares about his students' well-being and learning above all else. It's always nice to see that instructors care about students and see them as whole people.



Data Science and Visualization in R student