Talks and Posters

Seminar and Workshop Talks

1. Helwig, N. E. (2025, December 3). Improving science via artificial intelligence. Part 1: introduction to GenAI and LLMs. Quantitative and Psychometric Methods Seminar, University of Minnesota, Minneapolis, MN, USA.
2. Helwig, N. E. (2025, November 12). Developing open-source software. Quantitative and Psychometric Methods Seminar, University of Minnesota, Minneapolis, MN, USA.
3. Helwig, N. E. (2025, October 13). High-dimensional classification and regression of psychological data. Genes, Brains, and Behavior Seminar, University of Minnesota, Minneapolis, MN, USA.
4. Helwig, N. E. (2024, Oct. 8). Model selection and smoothing in generalized nonparametric regression. Quantitative and Psychometric Methods Seminar, University of Minnesota, Minneapolis, MN, USA.
5. Helwig, N. E. (2023, Sep. 13). Model selection and smoothing in generalized nonparametric regression. School of Statistics Seminar, University of Minnesota, Minneapolis, MN, USA.
6. Helwig, N. E. (2021, Apr. 23). Spectrally sparse nonparametric regression via elastic net regularized smoothers. Statistics & Data Science Colloquium Series. University of Central Florida, Orlando, Florida, USA.
7. Helwig, N. E. (2021, Apr. 5). Exploring latent brain networks via simultaneous component analysis. Quantitative Methods Colloquium, Vanderbilt University. Nashville, Tennessee, USA.
8. Helwig, N. E. (2020, Sep. 28). Modeling COVID-19 Trends in the United States. Psychology 1010 Guest Lecture, Department of Psychology, University of Minnesota.
9. Helwig, N. E. (2019, Mar. 8). Reproducible data wrangling and modeling with R. Department of Psychology Open and Reproducible Science Brown Bag Series. University of Minnesota.
10. Helwig, N. E. (2019, February 13). Statistical Nonparametric Mapping: Multivariate Permutation Tests for Location, Correlation, and Regression Problems in Neuroimaging. Quantitative and Psychometric Methods Seminar, University of Minnesota, Minneapolis, MN, USA.
11. Helwig, N. E. (2018, Aug. 16). Linear regression in R. Institute for Research in Statistics and its Applications Reproducible Research Workshop, Minneapolis, Minnesota, USA.
12. Helwig, N. E. (2018, Aug. 16). Simple statistics in R. Institute for Research in Statistics and its Applications Reproducible Research Workshop, Minneapolis, Minnesota, USA.
13. Helwig, N. E. (2017, Oct. 10). lme4 and Beyond. Institute for Research in Statistics and its Applications Mixed Models Workshop, Minneapolis, Minnesota, USA.
14. Helwig, N. E., & Snodgress, M. A. (2017, Sep. 21). Discovering genuine resting state brain networks via simultaneous component analysis. Institute for Research in Statistics and its Applications Neuro-Statistics Workshop, Minneapolis, Minnesota, USA.
15. Helwig, N. E. (2017, Aug. 31). Linear regression in R. Institute for Research in Statistics and its Applications Reproducible Research Workshop, Minneapolis, Minnesota, USA.
16. Helwig, N. E. (2017, Aug. 31). Simple statistics in R. Institute for Research in Statistics and its Applications Reproducible Research Workshop, Minneapolis, Minnesota, USA.
17. Helwig, N. E., Harper, J., Malone, S., & Iacono, W. (2017, May 6). Modeling longitudinal change in brain signals of twins. Institute for Research in Statistics and its Applications Neuro-Statistics Workshop, Minneapolis, Minnesota, USA.
18. Helwig, N. E. (2016, Apr. 12). Reproducible Research: A Valid Concept?. MRI Users Group Seminar, University of Minnesota, Minneapolis, Minnesota, USA.
19. Helwig, N. E. (2016, Mar. 21). Penalized Regression for Psychological Data. Industrial/Organizational Psychology Seminar, University of Minnesota, Minneapolis, Minnesota, USA.
20. Helwig, N. E. (2016, Feb. 25). Making Sense of Psychological Data via Functions and Factors. Institute of Child Development Seminar, University of Minnesota, Minneapolis, Minnesota, USA.
21. Helwig, N. E. (2015, June 10). Data-driven neuroimaging analysis. Brain Sciences Center, United States Department of Veterans Affairs, Minneapolis, Minnesota, USA.
22. Helwig, N. E. (2015, Apr. 15). Data-driven neuroimaging analysis. April Meeting of the ICID Group, University of Minnesota, Minneapolis, Minnesota, USA.
23. Helwig, N. E. (2014, Nov. 13). Tensor analysis of fMRI data. November Meeting of the Imaging Working Group, University of Minnesota, Minneapolis, Minnesota, USA.
24. Helwig, N. E. (2014, May 29). Semiparametric regression of big data in R. Computational Science and Engineering Big Data Workshop, University of Illinois, Urbana, Illinois, USA.

Conference Talks

1. Duffy, K. A., & Helwig, N. E. (2025, July 16). Predicting attention problems from brain connectivity using high-dimensional Poisson regression. International Meeting of the Psychometric Society, University of Minnesota, Minneapolis, MN, USA.
2. Lee, J. W., & Helwig, N. E. (2025, July 16). Classifying alcoholism from electroencephalography data using high-dimensional penalized regression. International Meeting of the Psychometric Society, University of Minnesota, Minneapolis, MN, USA.
3. Helwig, N. E. (2025, July 16). Group elastic net regression: a framework for high-dimensional regression and classification of psychological data. International Meeting of the Psychometric Society, University of Minnesota, Minneapolis, MN, USA.
4. Helwig, N. E. (2025, June 18). Model selection and smoothing in generalized nonparametric regression. Data and AI Intensive Research with Rigor and Reproducibility, University of Texas at San Antonio, San Antonio, TX, USA.
5. Helwig, N. E. (2021, June 25). Statistical learning via spectrally sparse smoothers. 4th International Conference on Econometrics and Statistics. Virtual Conference, Hong Kong University of Science and Technology, Hong Kong.
6. Almquist, Z. W., Helwig, N. E., & You, Y. (2018, Aug. 12). Connecting HUD continuum of care point-in-time homeless counts to US census geographies: 2005-2016. American Sociological Association Annual Meeting, Philadelphia, Pennsylvania, USA.
7. Helwig, N. E. (2018, Aug. 4). Statistical learning of successful smiles. Joint Statistical Meetings, Vancouver, British Columbia, Canada.
8. Helwig, N. E., & Ma, P. (2018, June 19). Smoothing spline ANOVA for super-large samples: Scalable computation via rounding parameters. ICSA Applied Statistics Symposium, New Brunswick, New Jersey, USA.
9. Helwig, N. E. (2018, June 13). Constrained Parallel Factor Analysis with applications to functional data. ThRee-way methods In Chemistry And Psychology (TRICAP) Conference, Angel Fire, New Mexico, USA.
10. Helwig, N. E. (2017, Oct. 9). Statistical learning of successful smiles. Third Annual Twin Cities American Statistical Association Fall Research Conference, University of St. Thomas, Minneapolis, Minnesota, USA.
11. Helwig, N. E. (2017, July 31). Multiway factor analysis with functional and structural constraints. Joint Statistical Meetings, Baltimore, Maryland, USA.
12. Helwig, N. E. (2017, July 18). Multiway factor analysis with functional and structural constraints. International Meeting of the Psychometric Society, University of Zurich, Zurich, Switzerland.
13. Helwig, N. E. (2017, May 23). Estimating latent trends in multivariate longitudinal data via Parafac2 with functional and structural constraints. Modern Modeling Methods Conference, Storrs, Connecticut, USA.
14. Helwig, N. E. (2017, Feb. 25). Nonparametric mixed-effects regression for large samples. Conference on Statistical Practice, Jacksonville, Florida, USA.
15. Helwig, N. E. (2016, Dec. 10). Efficient estimation of variance components in nonparametric mixed-effects models with large samples. 9th International Conference of the ERCIM WG on Computational and Methodological Statistics, European Consortium for Informatics and Mathematics, University of Seville, Seville, Spain.
16. Helwig, N. E. (2016, July 31). Nonparametric spatiotemporal analysis of neuroimaging data. Joint Statistical Meetings, Chicago, Illinois, USA.
17. Helwig, N. E. (2016, July 12). Nonparametric mixed-effects models for psychological data. International Meeting of the Psychometric Society, Asheville, North Carolina, USA.
18. Helwig, N. E. (2016, May 25). Efficient estimation of variance components in nonparametric mixed-effects models with large samples. Modern Modeling Methods Conference, Storrs, Connecticut, USA.
19. Helwig, N. E. (2015, Aug. 6). Smoothing splines for large samples. Institute of Mathematical Statistics New Researchers Conference, Seattle, Washington, USA.
20. Helwig, N. E. (2014, Aug. 9). Fast and stable smoothing spline analysis of variance models for large samples with applications to electroencephalography data analysis. American Psychological Association Annual Convention, Washington D.C., USA.
21. Helwig, N. E. (2014, Aug. 4). Smoothing spline analysis of variance models for electroencephalography data analysis. Joint Statistical Meetings, Boston, Massachusetts, USA.
22. Helwig, N. E., & Ma, P. (2013, Aug. 6). Fast and stable multiple smoothing parameter selection in smoothing spline analysis of variance models with large samples. Joint Statistical Meetings, Montreal, Quebec, Canada.
23. Helwig, N. E., & Hong, S. (2009, June 18). Parallel factor analysis of gait data. Three-way Methods in Chemistry and Psychology, Vall de Nuria, Spain.

Conference Posters

• Snodgress, M. A., & Helwig, N. E. (2021, Oct. 16). Cross-validated simultaneous component analysis for identifying individual and group differences in latent brain networks. Annual Meeting of the Society for Psychophysiological Research, Virtual Meeting.
• Duffy, K. A., & Helwig, N. E. (2021, Sep. 17). Predicting ADHD symptomatology from resting state network correlations using nonparametric smoothing spline regression. Annual Meeting of the Flux Society for Developmental Cognitive Neuroscience, Virtual Meeting.
• Snodgress, M. A., & Helwig, N. E. (2021, Apr. 15). Exploring latent brain networks with cross-validated simultaneous component analysis. Spring Meeting of the Twin Cities Chapter of the American Statistical Association, Minneapolis, Minnesota, United States.
• McCoy, M. E., Helwig, N. E., & Logue, C. (2019, June 27). The impact of hyperbaric oxygen on treating idiopathic sudden sensorineural hearing loss. Annual Scientific Meeting for the Undersea & Hyperbaric Medical Society, Río Grande, Puerto Rico.
• Malone, S., Helwig, N. E., Harper, J., & Iacono, W. (2018, Oct. 6). Substance-abuse risk among adolescents is associated with increased impulsive errors and decreased theta power in a multiway analysis of NoGo EEG activity. Society for Psychophysiological Research Annual Meeting, Quebec City, Quebec, Canada.
• Lawrence R. L., Sessions W. C., Jensen M., Staker J. L., Eid A., Breighner R., Helwig, N. E., Braman J. P., & Ludewig P. M. (2018, Apr. 17). The effect of glenohumeral plane of elevation on supraspinatus subacromial proximity. University of Minnesota Supercomputing Institute Research Exhibition, Minneapolis, Minnesota, USA.
• Hammell, A., Helwig, N. E., Kaczkurkin, A., & Lissek, S. (2018, Apr. 6). Temporal dynamics of fear generalization in PTSD across learning trials: A nonparametric exploratory model. Anxiety and Depression Association of America Annual Conference, Washington D.C., USA.
• Ruprecht, M. R., & Helwig, N. E. (2017, Oct. 9). A nonparametric model for right-wing authoritarianism. Third Annual Twin Cities American Statistical Association Fall Research Conference, University of St. Thomas, Minneapolis, Minnesota, USA.
• Jordan, V. A., McCoy, M. E., Helwig, N. E., & Odland, R. (2017, Sep. 12). Treatment outcomes of idiopathic sudden sensorineural hearing loss. American Academy of Otolaryngology-Head and Neck Surgery Foundation (AAO-HNSF) Annual Meeting, Chicago, Illinois, USA.
• Ruprecht, M. R., & Helwig, N. E. (2017, July 20). A nonparametric look at self-esteem development by gender and socioeconomic region. Pipelines into Biostatistics Symposium, Harvard University, Boston, Massachusetts, USA.
• Ruprecht, M. R., & Helwig, N. E. (2017, Apr. 20). A nonparametric model for right-wing authoritarianism. Undergraduate Research Opportunities Program Showcase, University of Minnesota, Minneapolis, Minnesota, USA.
• Ruprecht, M. R., & Helwig, N. E. (2017, Apr. 18). A nonparametric model for right-wing authoritarianism. Undergraduate Research Opportunities Program Showcase, University of Minnesota, Duluth, Minnesota, USA.
• Mervis, J., Helwig, N. E., Meyer-Kalos, P., & MacDonald, A. (2017, Mar. 27). The mismeasurement of psychosis: parsing differences in discriminating power across symptom dimensions. 16th International Congress on Schizophrenia Research, San Diego, California, USA.
• Ruprecht, M. R., & Helwig, N. E. (2016, Nov. 18). The determination of an effective smile. Undergraduate Research Opportunities Program Showcase, University of Minnesota, Minneapolis, Minnesota, USA.
• Ruprecht, M. R., & Helwig, N. E. (2016, Oct. 3). The determination of an effective smile. Second Annual Twin Cities American Statistical Association Fall Research Conference, Medtronic Campus, Mounds View, Minnesota, USA. [Winning Poster]
• Helwig, N. E. (2016, Sep. 24). Smoothing spline ANOVA models for analyzing event-related potential data. Society for Psychophysiological Research Annual Meeting, Minneapolis, Minnesota, USA.
• Ruprecht, M. R., & Helwig, N. E. (2016, Apr. 29). A nonparametric look at self-esteem development by gender and socioeconomic region. Undergraduate Research Opportunities Program Showcase, University of Minnesota, Minneapolis, Minnesota, USA.
• Ruprecht, M. R., & Helwig, N. E. (2016, Apr. 23). A nonparametric look at self-esteem development by gender and socioeconomic region. Minnesota Undergraduate Psychology Conference, Augsburg College, Minneapolis, Minnesota, USA.
• Ruprecht, M. R., & Helwig, N. E. (2016, Apr. 14). The determination of an effective smile. Undergraduate Research Opportunities Program Showcase, University of Minnesota, Duluth, Minnesota, USA.
• Ruprecht, M. R., & Helwig, N. E. (2015, Nov. 17). A nonparametric look at self-esteem development. Undergraduate Research Opportunities Program Showcase, University of Minnesota, Duluth, Minnesota, USA. [Winning Poster]
• Ruprecht, M. R., & Helwig, N. E. (2015, Oct. 30). A nonparametric look at self-esteem development. First Annual Twin Cities American Statistical Association Fall Research Conference, Mayo Clinic, Rochester, Minnesota, USA. [Winning Poster]
• Helwig, N. E. (2013, Apr. 24-25). A look into the mind of an alcoholic: Smoothing spline models for EEG data analysis. Computational Science and Engineering Annual Meeting, University of Illinois, Urbana, Illinois, USA.
• Hsiao-Wecksler, E. T., Dankowicz, H., Hong, S., Lague, M. R., Polk, J. D., Rosengren, K. S., DiBerardino, L. A., III, Helwig, N. E., & Park, K. (2009, Jan. 4-7). Quantitative characterization of complex motion patterns using shaped-based and multivariate techniques. National Science Foundation (NSF) Civil, Mechanical and Manufacturing Innovation (CMMI) Research Innovation Conference, Atlanta, Georgia, USA.
• Helwig, N. E., Hong, S., Polk, J. D., & Lague, M. R. (2010, Aug. 18-21). Analysis of gait cycle shapes using parallel factor analysis. Annual Meeting for the American Society of Biomechanics, Providence, Rhode Island, USA.
• Helwig, N. E., Hong, S., & Hsiao-Wecksler, E. T. (2009, Aug. 26-29). Partitioning gait data into temporal and intensity differences. Annual Meeting for the American Society of Biomechanics, State College, Pennsylvania, USA.
• Helwig, N. E., Hong, S., & Hsiao-Wecksler, E. T. (2009, Aug. 26-29). Methods to time-normalize gait cycle data. Annual Meeting for the American Society of Biomechanics, State College, Pennsylvania, USA.
• Hsiao-Wecksler, E. T., Dankowicz, H., Hong, S., Lague, M. R., Polk, J. D., Rosengren, K. S., DiBerardino, L. A., III, Helwig, N. E., & Park, K. (2009, June 22-25). Quantitative characterization of complex motion patterns using shaped-based and multivariate techniques. National Science Foundation (NSF) Civil, Mechanical and Manufacturing Innovation (CMMI) Research Innovation Conference, Honolulu, Hawaii, USA.