Nicholas J. Rockwood, PhD, MAS, MS

Assistant Professor, Division of Interdisciplinary Studies

Contact Information

Email nrockwood@llu.edu
Phone 909-651-9855
Fax 909-558-0441

Twitter @njrockwood

Division of Interdisciplinary Studies
Loma Linda University, Griggs Hall, Office 228
11065 Campus St., Loma Linda, CA  92350

Degrees

  • PhD, Quantitative Psychology - The Ohio State University, 2019
  • MAS, Applied Statistics - The Ohio State University, 2018
  • MA, Quantitative Psychology - The Ohio State University, 2017

Areas of Specialization

  • Multilevel modeling
  • Structural equation modeling
  • Item response theory
  • Statistical mediation and moderation analysis
  • Computational statistics

Professional Memberships

  • Psychometric Society
  • American Statistical Association (ASA)
  • Association for Psychological Science (APS)

Software

Recent Publications and Presentations

Publications

  • Rockwood, N. J. (2021). Efficient likelihood estimation of generalized structural equation models with a mix of normal and nonnormal responses. Psychometrika, 86(2), 642-667.
  • Rockwood, N. J. (2020). Maximum likelihood estimation of multilevel structural equation models with random slopes for latent covariates. Psychometrika, 85, 275-300.
  • Rockwood, N. J. & Hayes, A. F. (2020). Mediation, moderation, and conditional process analysis: Regression-based approaches for clinical research. In A.G.C. Wright & M.N. Hallquist (Eds.), The Cambridge Handbook of Research Methods in Clinical Psychology (pp. 396-414). Cambridge: Cambridge University Press.
  • Hayes, A. F. & Rockwood, N. J. (2020). Conditional process analysis: Concepts, computation, and advances in the modeling of the contingencies of mechanisms. American Behavioral Scientist, 64(1), 19–54.
  • Rockwood, N. J. & Jeon, M. (2019). Estimating complex measurement and growth models using the R package PLmixed. Multivariate Behavioral Research, 54(2), 288-306.
  • Lukowski, S. L., DiTrapani, J., Rockwood, N. J., Jeon, M., Thompson, L. A., & Petrill, S. A. (2019). Etiological distinction across dimensions of math anxiety. Behavior Genetics, 49(3), 310-316.
  • DiTrapani, J., Rockwood, N. J., & Jeon, M. (2018). Explanatory IRT analysis using the SPIRIT macro in SPSS. The Quantitative Methods for Psychology, 14(2), 81-98.
  • Jeon, M. & Rockwood, N. J. (2018). PLmixed: An R package for generalized linear mixed models with factor structures. Applied Psychological Measurement [Computer program exchange], 42(5), 401-402.
  • DiTrapani, J., Rockwood, N. J., & Jeon, M. (2018). IRT in SPSS using the SPIRIT macro. Applied Psychological Measurement [Computer program exchange], 42(2), 173-174.
  • Hayes, A. F. & Rockwood, N. J. (2017). Regression-based statistical mediation and moderation analysis in clinical research: Observations, recommendations, and implementation. Behaviour Research and Therapy, 98, 39-57.
  • Hayes, A. F., Montoya, A. K., & Rockwood, N. J. (2017). The analysis of mechanisms and their contingencies: PROCESS versus structural equation modeling. Australasian Marketing Journal (AMJ), 25(1), 76-81.
  • Kamptner, N. L., Teyber, F. H., Rockwood, N. J., & Drzewiecki, D. (2017). Evaluating the efficacy of an attachment-informed psychotherapeutic parenting program for incarcerated parents. Journal of Prison Education and Reentry, 4(2).

Presentations

  • Garland, S. N., ..., Rockwood, N. J., et al. (2019, September). A prospective analysis of insomnia and subjective cognitive impairment in men with prostate cancer on androgen deprivation therapy. Talk presented at the International Psycho-Oncology Society (IPOS) World Congress of Psycho-Oncology, Banff, Alberta, Canada.
  • Rockwood, N. J. (2018, July). Estimating cross-classified item response models using the MH-RM algorithm. Talk presented at the International Meeting of the Psychometric Society (IMPS), New York, NY.
  • DiTrapani, J., Rockwood, N. J., & Jeon, M. (2018, July). Modeling extreme response styles in behavioral genetics using IRTrees. Talk presented at the International Meeting of the Psychometric Society (IMPS), New York, NY.
  • Rockwood, N. J. & Hayes, A. F. (2017, May). MLmed: An SPSS macro for multilevel mediation and conditional process analysis. Poster presented at the annual meeting of the Association of Psychological Science (APS), Boston, MA.
  • DiTrapani, J., Rockwood, N. J., & Jeon, M. (2017, April). IRT in SPSS using the SPIRIT macro. Talk presented at the annual meeting of the National Council on Measurement in Education (NCME), San Antonio, TX.
  • Pettey, A. A., Agars, M. D., Rockwood, N. J., Ceballos, B. & Kirkham, J. (2017, April). Boundary management among parents of children with ASD. Poster presented at the annual meeting of the Society for Industrial/Organizational Psychologists (SIOP), Orlando, FL.
  • Cazares, E. J., Agars, M. D., & Rockwood, N. J. (2016, May). Work pressure, family, and health: The role of social support. Poster presented at the annual meeting of the Association of Psychological Science (APS), Chicago, IL.
  • Rockwood, N. J., Osretkar, H., & Campbell, K. (2015, April). Perceptions of racism/ discrimination and mental health in a South African sample. Poster presented at the annual meeting of the Western Psychological Association (WPS), Las Vegas, NV.
  • McConnaughy, J. C., Agars, M. D., Rockwood, N. J., & Pettey, A. A. (2015, April). Development of an employee green behavior descriptive norms scale. Poster presented at the annual meeting of the Society for Industrial/Organizational Psychologists (SIOP), Philadelphia, PA.