Welcome. I am an assistant professor of quantitative psychology at San Diego State University. I am generally interested in longitudinal data analysis, and have deeper interests in nonlinear models, models for mutitrait-multimethod data, multilevel differential equation models, and variance heterogeneity models. You can find a copy of my CV here: jl_helm_2016_10_10
I am dedicated to teaching statistics and research methods to social scientists at all levels of expertise, and I provide free online tutorials for basic and high level statistics within R.