Nathaniel E. Helwig University of Minnesota

Associate Professor of Psychology and Statistics

Methodological Interests:


  • Regularization and Variable Selection
  • Generalized Nonparametric Regression
  • Robust Nonparametric Inference
  • Multivariate and Tensor Analysis
  • Constrained Multivariate Optimization

Applied Interests:


  • Biomechanics and Locomotion
  • Neuroscience (EEG and fMRI)
  • Perception of Facial Expressions
  • Analysis of Individual Differences
  • Temporal and Spatiotemporal Data

High-Dimensional and Penalized Regression

Cross-validation error curves.

Robust Nonparametric Inference

Permutation distributions.

Multiway Analysis and Tensor Decompositions

PCA and PARAFAC models.

Smoothing Splines

Linear and cubic smoothing splines.

Tensor Product Smoothing

Tensor product cubic splines.

Non-Gaussian Data Analysis

Non-normal data generating distributions.

Non-Gaussian Data Simulation

Feasible parameters for Fleishman's method.

Gait Analysis

Gait analysis.

Biomechanics and Locomotion

Neck mobility.

Neuroscience (Event-Related EEG)

EEG data.

Neuroscience (Task-Based fMRI)

fMRI task based data.

Neuroscience (Resting-State fMRI)

fMRI resting state data.

Self-Esteem Development

Self-esteem data.

Gender Pay Gap in USA

Gender pay gap data.

Perception of Facial Expressions

Smile perception data.

Perception of Colors and Music

Music perception data.

Global Warming Trends

Global warming trends.

El Nino Trends

El Nino spatiotemporal trends.

Alcohol Consumption Trends

Alcohol consumption data.

United States Homelessness Trends

Homelessness spatiotemporal trends.

Bike Rental Trends

Bike renal trends.

Social Media Trends

Twitter trends.