Hi!  I'm a statistician, methodologist, and computer programmer. I currently work as a research scientist at the Institute for Health Research and Policy at the University of Illinois Chicago. I also work closely with members of the d3center lab at the University of Michigan.
I graduated from of the University of Scranton with a bachelor's in psychology and minor in computer science, and the Pennsylvania State University with a Ph.D. in statistics. My thesis advisor was Dr. Runze Li. I worked for about 15 years as a research associate and research associate professor at the Methodology Center at Penn State. 

My main current statistical research interests are:

• Interpretability in the analysis of intensive longitudinal data
• Latent class analysis (finite mixture modeling)
• Mediation with high-dimensional or longitudinal data
• Experimental design and analysis, especially analysis of sequential multiple assignment randomized trials
• Applications in substance abuse, mental health and other health-related research

I'm looking for new opportunities to help apply data to practical human problems.
Please feel free to contact me at dziak @ uic.edu, dziakj1 @ gmail.com or johnjdziak @ protonmail.com.  Thank you!

Other sites: LinkedIn, ORCiD, GitHub, iNaturalist, Google Scholar