Jeffrey D. Long, PhD

Portrait
Professor of Psychiatry
Professor of Biostatistics

Contact Information

Office
1-328 Medical Education Building
Iowa City, IA 52242
319-335-8524

Education

BA, Psychology, University of California
MS, Experimental Psychology, California State University
PhD, Quantitative Psychology, University of Southern California

Research Summary

My area is applied statistics in medicine and the behavioral sciences. I am specifically interested in statistical models for use in the study of neurodegenerative diseases, especially Huntington's disease. My work focuses on the long-term course of neurodegenerative diseases, which involves the application of longitudinal and time-to-event models. My work is supported primarily by the CHDI Foundation, which is a not-for-profit biomedical research organization devoted to Huntington's disease. Another interest of mine is open-source (free) software for statistical analysis and report generation. This includes the R software for statistical computing and graphics and RStudio for interactive programming and report writing. In addition to the professional publications below, I am the co-author (with A. Zieffler and J. Harring) of the textbook “Comparing Groups: Randomization and Bootstrap Methods using R” (New York: Wiley). I am also the author of the textbook “Longitudinal Data Analysis for the Behavioral Sciences using R” (Thousand Oaks, CA: Sage).

Publications

Long, J. D., Langbehn, D. R., Tabrizi, S. J., Landwehrmeyer, B. G., Paulsen, J. S., Warner, J. & Sampaio, C. (2017). Validation of a prognostic index for Huntington's disease. Movement Disorders, 32, 256-263.

Epping, E. A., Kim, J. I., Craufurd, D., Brashers-Krug, T. M., Anderson, K. E., McCusker, E., Luther, J., Long, J. D. & Paulsen, J. S. (2016). Longitudinal Psychiatric Symptoms in Prodromal Huntington's Disease: A Decade of Data. The American journal of psychiatry, 173(2), 184-92. PMID: 26472629.

Kim, J. I., Long, J. D., Mills, J. A., McCusker, E. & Paulsen, J. S. (2015). Multivariate clustering of progression profiles reveals different depression patterns in prodromal Huntington disease. Neuropsychology, 29(6), 949-60. PMID: 26011117.

Harrington, D. L., Rubinov, M., Durgerian, S., Mourany, L., Reece, C., Koenig, K., Bullmore, E., Long, J. D., Paulsen, J. S. & Rao, S. M. (2015). Network topology and functional connectivity disturbances precede the onset of Huntington's disease. Brain : a journal of neurology, 138(Pt 8), 2332-46. PMID: 26059655.

Long, J. D., Jane, P. S. (2015). Multivariate prediction of motor diagnosis in Huntington's disease: 12 years of PREDICT-HD. Movement Disorders, 30(12), 1664-1672. PMID: 26340420.

Matsui, J. T., Vaidya, J. G., Johnson, H. J., Magnotta, V. A., Long, J. D., Mills, J. A., Lowe, M. J., Sakaie, K. E., Rao, S. M., Smith, M. M. & Paulsen, J. S. (2014). Diffusion weighted imaging of prefrontal cortex in prodromal Huntington's disease. Human Brain Mapping, 35, 1562-1573.

Paulsen, J. S., Long, J. D. (2014). Onset of Huntington disease: Can it be purely cognitive?. Movement Disorders, 29, 1342-1350.

Paulsen, J. S., Long, J. D. & et al (2014). Prediction of manifest Huntington disease with clinical and imaging measures: A 12-year prospective observational study. The Lancet Neurology, 13, 1193-1201.

Spalletta, G., Robinson, R. G., Cravello, L., Pontieri, F. E., Pierantozzi, M., Stefani, A., Long, J. D., Caltagirone, C. & Assogna, F. (2014). The early longitudinal course of affective and cognitive symptoms and disorders in de novo patients with Parkinson’s disease. (Vols. 261). pp. 1126-1132. Journal of Neurology.

Long, J. D., Paulsen, J. S., Marder, K., Zhang, Y. & Mills, J. A. (2014). Tracking motor impairments in the progression of Huntington's Disease. Movement Disorders, 29, 477-489.

Paulsen, J., Smith, M. & Long, J. D. (2013). Cognitive decline in prodromal Huntington Disease: Implications for clinical trials. Journal of Neurology, Neurosurgery and Psychiarty, 84, 1233-1239.

Bonner-Jackson, A., Long, J. D., Westervelt, H., Tremont, G., Aylward, E. & Paulsen, J. S. (2013). Cognitive reserve and brain reserve in prodromal Huntington's disease. Journal of the International Neuropsychological Society, 19, 1-12. PMID: 23702309.

Leoni, V., Long, J. D., Mills, J. A., Di Donato, S. & Paulsen, J. S. (2013). Plasma 24S-hydroxycholesterol correlation with markers of Huntington disease progression. Neurobiology of Disease, 55, 37-43.

McCusker, E., Gunn, D., Epping, E. A., Loy, C., Radford, K., Griffith, J., Mills, J. A., Long, J. & Paulsen, J. (2013). Unawareness of motor phenoconversion in Huntington Disease. Neurology, 81, 1-7.

Long, J. D., Matson, W. R., Juhl, A. R., Leavitt, B. R. & Paulsen, J. S. (2012). 8OHdG as a marker for Huntington disease progression. Neurobiology of Disease, 46(3), 625-34. PMID: 22414782.

Zhang, Y., Long, J. D., Mills, J. A., Warner, J. H., Lu, W. & Paulsen, J. S. (2011). Indexing disease progression at study entry with individuals at-risk for Huntington disease. American Journal of Medical Genetics, Part B, 156B(7), 751-63.

Fox, R. J., Coffey, C. S., Conwit, R., Cudkowicz, M. E., Gleason, T., Goodman, A., Klawiter, E. C., Matsuda, K., McGovern, M., Naismith, R. T., Ashokkumar, A., Barnes, J., Ecklund, D., Klingner, E., Koepp, M., Long, J. D., Natarajan, S., Thornell, B., Yankey, J., Bermel, R. A., Debbins, J. P., Huang, X., Jagodnik, P., Lowe, M. J., Nakamura, K., Narayanan, S., Sakaie, K. E., Thoomukuntla, B., Zhou, X., Krieger, S., Alvarez, E., Apperson, M., Bashir, K., Cohen, B. A., Coyle, P. K., Delgado, S., Dewitt, L. D., Flores, A., Giesser, B. S., Goldman, M. D., Jubelt, B., Lava, N., Lynch, S. G., Moses, H., Ontaneda, D., Perumal, J. S., Racke, M., Repovic, P., Riley, C. S., Severson, C., Shinnar, S., Suski, V., Weinstock-Guttman, B., Yadav, V. & Zabeti, A. (2018). Phase 2 Trial of Ibudilast in Progressive Multiple Sclerosis. The New England journal of medicine, 379(9), 846-855. PMID: 30157388.

Long, J. D., Lee, J. M., Aylward, E. H., Gillis, T., Mysore, J. S., Abu Elneel, K., Chao, M. J., Paulsen, J. S., MacDonald, M. E. & Gusella, J. F. (2018). Genetic Modification of Huntington Disease Acts Early in the Prediagnosis Phase. American journal of human genetics. PMID: 30122542.

Gregory, S., Long, J. D., Klöppel, S., Razi, A., Scheller, E., Minkova, L., Johnson, E. B., Durr, A., Roos RAC,, Leavitt, B. R., Mills, J. A., Stout, J. C., Scahill, R. I., Tabrizi, S. J. & Rees, G. (2018). Testing a longitudinal compensation model in premanifest Huntington's disease. Brain : a journal of neurology. PMID: 29788038.

Philibert, R., Dogan, M., Noel, A., Miller, S., Krukow, B., Papworth, E., Cowley, J., Long, J. D., Beach SRH, & Black, D. W. (2018). Dose Response and Prediction Characteristics of a Methylation Sensitive Digital PCR Assay for Cigarette Consumption in Adults. Frontiers in genetics, 9, 137. PMID: 29740475.

Liu, J., Ciarochi, J., Calhoun, V. D., Paulsen, J. S., Bockholt, H. J., Johnson, H. J., Long, J. D., Lin, D., Espinoza, F. A., Misiura, M. B., Caprihan, A. & Turner, J. A. (2018). Genetics Modulate Gray Matter Variation Beyond Disease Burden in Prodromal Huntington's Disease. Frontiers in neurology, 9, 190. PMID: 29651271.

Espinoza, F. A., Turner, J. A., Vergara, V. M., Miller, R. L., Mennigen, E., Liu, J., Misiura, M. B., Ciarochi, J., Johnson, H. J., Long, J. D., Bockholt, H. J., Magnota, V. A., Paulsen, J. S. & Calhoun, V. D. (2018). Whole-brain connectivity in a large study of Huntington's disease gene mutation carriers and healthy controls. Brain connectivity. PMID: 29291624.

Amara, A. W., Chahine, L. M., Caspell-Garcia, C., Long, J. D., Coffey, C., Högl, B., Videnovic, A., Iranzo, A., Mayer, G., Foldvary-Schaefer, N., Postuma, R., Oertel, W., Lasch, S., Marek, K. & Simuni, T. (2017). Longitudinal assessment of excessive daytime sleepiness in early Parkinson's disease. J Neurol Neurosurg Psychiatry.

Gregory, S., Long, J. D., Tabrizi, S. J. & Rees, G. (2017). Measuring compensation in neurodegeneration using MRI. Curr Opin Neurol.

Gregory, S., Long, J. D., Kloppel, S., Razi, A., Scheller, E., Minkova, L., Papoutsi, M., Mills, J. A., Durr, A., Leavitt, B. R., Roos, R. A., Stout, J. C., Scahill, R. I., Langbehn, D. R., Tabrizi, S. J. & Rees, G. (2017). Operationalizing compensation over time in neurodegenerative disease. Brain, 140(4), 1158-1165. PMID: 28334888.

Shaffer, J. J., Ghayoor, A., Long, J. D., Kim, R. E., Lourens, S., O'Donnell, L. J., Westin, C. F., Rathi, Y., Magnotta, V., Paulsen, J. S. & Johnson, H. J. (2017). Longitudinal diffusion changes in prodromal and early HD: Evidence of white-matter tract deterioration. Hum Brain Mapp.

Westervelt, H. J., Bernier, R. A., Faust, M., Gover, M., Bockholt, H. J., Zschiegner, R., Long, J. D. & Paulsen, J. S. (2017). Data quality assurance and control in cognitive research: Lessons learned from the PREDICT-HD study. Int J Methods Psychiatr Res.

Long, J. D., Mills, J. A., Leavitt, B. R., Durr, A., ....,, Langbehn, D. R. & et al, (2017). Survival end points for Huntington disease trials prior to a motor diagnosis. JAMA Neurology, 74(11), 1-9.

Carvalho, J. O., Long, J. D., Westervelt, H. J., Smith, M. M., Bruce, J. M., Kim, J. I., Mills, J. A., Paulsen, J. S. & The Predict-Hd Investigators And Coordinators Of The Huntington Study Group (2016). The impact of oculomotor functioning on neuropsychological performance in Huntington disease. Journal of clinical and experimental neuropsychology, 38(2), 217-26. PMID: 26745770.

Fox, R. J., Coffey, C. S., Cudkowicz, M. E., Gleason, T., Goodman, A., Klawiter, E. C., Matsuda, K., McGovern, M., Conwit, R., Naismith, R., Ashokkumar, A., Bermel, R., Ecklund, D., Koepp, M., Long, J. D. & et al, (2016). Design, rationale, and baseline characteristics of the randomized double-blind phase II clinical trial of ibudilast in progressive multiple sclerosis. Contemp Clin Trials, 50, 166-177.

Shin, T., Davison, M. L. & Long, J. D. (2016). Maximum Likelihood Versus Multiple Imputation for Missing Data in Small Longitudinal Samples With Nonnormality. Psychol Methods.

Simuni, T., Long, J. D., Caspell-Garcia, C., Coffey, C., Lasch, S., Tanner, C., Jennings, D., Kieburtz, K. & Marek, K. (2016). Predictors of time to symptomatic therapy in early Parkinson’s disease. (Vols. 3). pp. 482-494. Ann Clin Transl Neurol.

Liu, D., Long, J. D., Zhang, Y., Raymond, L. A., Marder, K., Rosser, A., McCusker, E. A., Mills, J. A. & Paulsen, J. S. (2015). Motor onset and diagnosis in Huntington disease using the diagnostic confidence level. Journal of neurology, 262(12), 2691-8. PMID: 26410751.

Klöppel, S., Gregory, S., Scheller, E., Minkova, L., Razi, A., Durr, A., Roos, R. A., Leavitt, B. R., Papoutsi, M., Landwehrmeyer, G. B., Reilmann, R., Borowsky, B., Johnson, H., Mills, J. A., Owen, G., Stout, J., Scahill, R. I., Long, J. D., Rees, G. & Tabrizi, S. J. (2015). Compensation in Preclinical Huntington's Disease: Evidence From the Track-On HD Study. EBioMedicine, 2(10), 1420-9. PMID: 26629536.

Wassef, S. N., Wemmie, J., Johnson, C. P., Johnson, H., Paulsen, J. S., Long, J. D. & Magnotta, V. A. (2015). T1? imaging in premanifest Huntington disease reveals changes associated with disease progression. Movement disorders : official journal of the Movement Disorder Society, 30(8), 1107-14. PMID: 25820773.

Williams, J. K., Kim, J. I., Downing, N., Farias, S., Harrington, D. L., Long, J. D., Mills, J. A. & Paulsen, J. S. (2015). Everyday cognition in prodromal Huntington disease. Neuropsychology, 29(2), 255-67. PMID: 25000321.

Musso, M., Westervelt, H. J., Long, J. D., Morgan, E., Woods, S. P., Smith, M. M., Lu, W. & Paulsen, J. S. (2015). Intra-individual Variability in Prodromal Huntington Disease and Its Relationship to Genetic Burden. Journal of the International Neuropsychological Society : JINS, 21(1), 8-21. PMID: 26304055.

Spalletta, G., Long, J. D., Robinson, R. G., Trequattrini, A., Pizzoli, S., Caltagirone, C. & Orfei, M. D. (2015). Longitudinal Neuropsychiatric Predictors of Death in Alzheimer's Disease. Journal of Alzheimer's disease : JAD, 48(3), 627-36. PMID: 26402103.

Gregory, S., Scahill, R. I., Seunarine, K. K., Stopford, C., Zhang, H., Zhang, J., Orth, M., Durr, A., Roos, R. A., Langbehn, D. R., Long, J. D., Johnson, H., Rees, G., Tabrizi, S. J. & Craufurd, D. (2015). Neuropsychiatry and White Matter Microstructure in Huntington's Disease. Journal of Huntington's disease, 4(3), 239-49. PMID: 26443926.

Kim, R. E., Lourens, S., Long, J. D., Paulsen, J. S. & Johnson, H. J. (2015). Preliminary analysis using multi-atlas labeling algorithms for tracing longitudinal change. Frontiers in neuroscience, 9, 242. PMID: 26236182.

Lourens, S., Zhang, Y., Long, J. D. & Paulsen, J. S. (2014). Analysis of longitudinal censored semicontinuous data with application to the study of executive dysfunction: The Towers Task. Statistical methods in medical research. PMID: 25431462.

Paulsen, J. S., Long, J. D. (2014). Onset of Huntington's disease: can it be purely cognitive?. Movement disorders : official journal of the Movement Disorder Society, 29(11), 1342-50. PMID: 25142616.

Plis, S. M., Hjelm, D. R., Salakhutdinov, R., Allen, E. A., Bockholt, H. J., Long, J. D., Johnson, H. J., Paulsen, J. S., Turner, J. A. & Calhoun, V. D. (2014). Deep learning for neuroimaging: a validation study. Frontiers in neuroscience, 8, 229. PMID: 25191215.

Liu, D., Johnson, H. J., Long, J. D., Magnotta, V. A. & Paulsen, J. S. (2014). The power-proportion method for intracranial volume correction in volumetric imaging analysis. Frontiers in neuroscience, 8, 356. PMID: 25414635.

Biglan, K. M., Zhang, Y., Long, J. D., Geschwind, M., Kang, G. A., Killoran, A., Lu, W., McCusker, E., Mills, J. A., Raymond, L. A., Testa, C., Wojcieszek, J. & Paulsen, J. S. (2014). Redefining the diagnosis of Huntington disease: the PREDICT-HD study. Frontiers in Aging Neurosciences, 5, 1-8.

Cutuli, J. J., Desjardins, C. D., Herbers, J. E., Long, J. D., Heistad, D., Chan, C., Hinz, E. & Masten, A. S. (2013). Academic achievement trajectories of homeless and highly mobile students: resilience in the context of chronic and acute risk. Child Development, 84, 841-857. PMID: 23110492.

Epping, E. A., Mills, J. A., Beglinger, L. J., Fiedorowicz, J. G., Craufurd, D., Smith, M. M., Groves, M., Bijanki, K. R., Downing, N., Williams, J. K., Long, J. D. & Paulsen, J. S. (2013). Characterization of Depression in Prodromal Huntington Disease in the Neurobiological Predictors of HD (PREDICT-HD) Study. Journal of Psychiatric Research, 47(10), 1423-1431. PMID: 23790259.

Paulsen, J. S., Long, J. D. (2013). Establishing a clinical trial battery for Huntington disease. Nature Reviews Neurology, 8, 250-251.

Shin, T., Davidson, M. L., Long, J. D., Chan, C. & Heistad, D. (2013). Exploring gains in reading and mathematics achievement among regular and exceptional students using growth curve modeling. Learning and Individual Differences, 23(1), 92-100.

Aylward, E. H., Harrington, D., Mills, J. A., Nopoulos, P. C., Ross, C. A., Long, J. D., Liu, D., Westervelt, H. K. & Paulsen, J. S. (2013). Regional atrophy associated with cognitive and motor function in prodromal Huntington disease. Journal of Huntington Disease.

Klimes-Dougan, B., Desjardins, C. D., James, M. G., Narayan, A. J., Long, J. D., Cullen, K. R., Gold, P. W. & Martinez, P. P. (2013). The development of thought problems: A longitudinal family risk study of offspring of bipolar, unipolar, and well parents. Development and Psychopathology,(15), 1079-1091.

Englund, M. M., Siebenbruner, J., Olivia, E. M., Egeland, B., Chung, C. T. & Long, J. D. (2013). The developmental significance of late adolescent substance use for early adult functioning. Devepmental Psychology, 49(8), 1554-1564.

Rao, J. A., Harrington, D. L., Durgerian, S., Reece, C., Koenig, K., Lowe, M. J., Magnotta, V. A., Long, J. D., Johnson, H. J., Paulsen, J. S. & Rao, S. M. (2013). Disruption of response inhibition circuits in prodromal Huntington Disease. Cortex, 58, 72-85.

Papp, K. V., Snyder, P. J., Mills, J. A., Duff, K., Westervelt, H. J., Long, J. D., Lourens, S. & Paulsen, J. S. (2013). Measuring executive dysfunction longitudinally and in relation to genetic burden, brain volumetrics, and depression in prodromal Huntington disease. Archives of Clinical Neuropsychology, 28(2), 156-68.

Harrington, D. L., Liu, D., Smith, M. M., Mills, J. A., Long, J. D., Aylward, E. H. & Paulsen, J. S. (2013). Neuroanatomical correlates of cognitive functioning in prodromal Huntington disease. Brain and Behavior.

Downing, N., Kim, J. I., Williams, J. K., Long, J. D., Mills, J. A. & Paulsen, J. S. (2013). WHODAS 2.0 in prodromal Huntington disease: measures of functioning in neuropsychiatric disease. European Journal of Human Genetics.

Masten, M. S., Herbers, J. E., Desjardins, C. D., Cutuli, J. J., McCormick, C. M., Sapienza, J. K., Long, J. D. & Zelazo, P. D. (2012). Executive function skills and school success in young children experiencing homelessness. Health Education Research.

Long, J. D., Zhang, Y., Paulsen, J. S., Kim, J. I., Mills, J. A. & Lu, W. (2012). Classification using manifest motor signs in Huntington disease.

Matsui, J. T., Vaidya, J. G., Magnotta, V. A., Long, J. D., Mills, J. A., Lowe, M. J., Rao, S. M., Smtih, M. M., Paulsen, J. S. & Johnson, H. J. (2012). Diffusion weighted imaging of prefrontal cortex in prodromal Huntington’s disease.

Shin, T., Davidson, M. L. & Long, J. D. (2012). Growth curve modeling of gains in reading and mathematics achievement among regular and exceptional students.

Desjardins, C. D., Long, J. D., Chan, C. K., Hinz, E., Heistad, D. & Masten, A. S. (2012). Growth patterns in school suspensions: testing crescendo effects with multilevel modeling.

Long, J. D. (2012). Longitudinal Data Analysis for the Behavioral Sciences using R. Thousand Oaks, CA: Sage Publications Inc.

Magnotta, V. A., Matsui, J., Liu, D., Johnson, H. J., Long, J. D., Bolster, B. D., Mueller, B. A., Lim, K., Mori, S., Helmer, K., Turner, J. A., Reading, S., Lowe, M. J., Aylward, E., Flashman, L. A., Bonett, G. & Paulsen, J. S. (2012). Multi-center reliability of diffusion tensor imaging. Brain Connectivity 2, 2, 345-355. PMID: 23075313.

Ramel, S., Long, J. D., Gray, H., Durrwachter-Erno, K., Demerath, E. W. & Rao, R. (2012). Neonatal hyperglycemia and dimenshined long-term growth in very low birth weight preterm infants.

Bonner-Jackson, A., Long, J. D., Westervelt, H., Tremont, G., Alyward, E. & Paulsen, J. S. (2012). Protective effects of cognitive reserve on neuropsychological performance and brain structure in Huntington disease.

Aylward, E. H., Liu, D., Nopoulos, P. C., Ross, C. A., Pierson, R. K., Mills, J. A., Long, J. D. & Paulsen, J. S. (2012). Striatal volume contributes to the prediction of onset of Huntington disease in incident cases. Biological Psychiatry, 71(9), 822-8.

Zeller, M. H., Guilfoyle, S. M., Reiter-Purtill, J., Ratcliff, M. B., Inge, T. H. & Long, J. D. (2011). Adolescent bariatric surgery: caregiver and family functioning across the first postoperative year. Surgery for Obesity and Related Diseases, 7(2), 145-50. PMID: 20869329.

Zieffer, A., Harring, J. H. & Long, J. D. (2011). Comparing Groups: Randomization and Bootstrap Methods Using R. New York: John Wiley & Sons..

Klimes-Dougan, B., Long, J. D., Lee, C. Y., Ronsaville, D. S., Gold, P. W. & Martinez, P. E. (2010). Continuity and cascade in offspring of bipolar parents: a longitudinal study of externalizing, internalizing, and thought problems. Development and Psychopathology, 22(4), 849-66.

Rao, R., Ennis, K., Long, J. D., Ugurbil, K., Gruetter, R. & Tkac, I. (2010). Neurochemical changes in the developing rat hippocampus during prolonged hypoglycemia. Journal of Neurochemistry, 114(3), 728-38.

Long, J. D. (2010). Rank order correlation. In Corsini , Corsini (Eds.) Corsini’s Encyclopedia of Psychology, 4th Edition. Wiley.

Masten, A. S., Desjardins, C. D., McCormick, C. M., Kuo, S. I. & Long, J. D. (2010). The significance of childhood competence and problems for adult success in work: a developmental cascade analysis. Development and Psychopathology, 22(3), 679-94.

Long, J., Ryoo, J. (2010). Using fractional polynomials to model non-linear trends in longitudinal data. The British Journal of Mathematical and Statistical Psychology, 63(Pt 1), 177-203. PMID: 19486548.

Obradovic, J., Long, J. D., Cutuli, J. J., Chan, C. K., Hinz, E., Heistad, D. & Masten, A. S. (2009). Academic achievement of homeless and highly mobile children in an urban school district: longitudinal evidence on risk, growth, and resilience. Development and Psychopathology, 21(2), 493-518. PMID: 19338695.

Pellegrini, A. D., Long, J. D., Solberg, D. W., Roseth, C., Dupuis, D. N., Bohn, C. M. & Hickey, M. (2009). Bullying and Social Status During School Transitions. In S. R. Jimerson , S. M. Swearer , D. L. Espelage , S. R. Jimerson , S. M. Swearer , D. L. Espelage (Eds.) The Handbook of Bullying in Schools: An International Perspective. pp. 199-210. New York: Routledge.

Reschly, A. L., Busch, T. W., Betts, J., Deno, S. L. & Long, J. D. (2009). Curriculum-based measurement oral reading as an indicator of reading achievement: A meta-analysis of the correlational evidence. Journal of School Psychology, 47, 427-69. PMID: 19808123.

Gunnar, M. R., Wewerka, S., Frenn, K., Long, J. D. & Griggs, C. (2009). Developmental changes in hypothalamus-pituitary-adrenal activity over the transition to adolescence: normative changes and associations with puberty. Development and Psychopathology, 21(1), 69-85. PMID: 19144223.

Masten, A. S., Long, J. D., Kuo, S., McCormick, C. M. & Desjardins, C. D. (2009). Developmental models of strategic intervention. European Journal of Developmental Sciences, 3, 282-91.

Shin, T., Davison, M. L. & Long, J. D. (2009). Effects of missing data methods in strcutural equations modeling with nonnormal longitudinal data. Structural Equation Modeling, 16, 70-98.

Long, J. D., Loeber, R. & Farrington, D. P. (2009). Marginal and Random Intercepts Models for Longitudinal Binary Data With Examples From Criminology. Multivariate Behavioral Research, 44(1), 28-58.

Hans, D. M., Pylipow, M., Long, J. D., Thureen, P. J. & Georgieff, M. K. (2009). Nutritional practices in the neonatal intensive care unit: analysis of a 2006 neonatal nutrition survey. Pediatrics, 123(1), 51-7.

Zeller, M. H., Modi, A. C., Noll, J. G., Long, J. D. & Inge, T. H. (2009). Psychosocial functioning improves following adolescent bariatric surgery. Obesity (Silver Spring, Md.), 17(5), 985-90.

Kertes, D. A., Gunnar, M. R., Madsen, N. J. & Long, J. D. (2008). Early deprivation and home basal cortisol levels: a study of internationally adopted children. Development and Psychopathology, 20(2), 473-91.

Burt, K. B., Obradovic, J., Long, J. D. & Masten, A. S. (2008). The interplay of social competence and psychopathology over 20 years: testing transactional and cascade models. Child Development, 79(2), 359-74.

Espin, C., Wallace, T., Campbell, H., Lembke, E., Long, J. D. & Ticha, R. (2008). Validity and reliability of curriculum-based measures in written expression: Predicting the success of secondary-school students on state standards tests. Exceptional Children, 74, 174-93.

Pellegrini, A. D., Long, J. D., Roseth, C. J., Bohn, C. M. & Van Ryzin, M. (2007). A short-term longitudinal study of preschoolers' (Homo sapiens) sex segregation: the role of physical activity, sex, and time. Journal of Comparative Psychology (Washington, D.C. : 1983), 121(3), 282-9.

Pellegrini, T. A., Long, J. D. (2007). An observational longitudinal study of early heterosexual interaction at a middle school dance: Male and female strategies for gender integration. Journal of Research on Adolescence, 17, 613-38.

Brekke, J. S., Hoe, M., Long, J. & Green, M. F. (2007). How neurocognition and social cognition influence functional change during community-based psychosocial rehabilitation for individuals with schizophrenia. Schizophrenia Bulletin, 33(5), 1247-56.

Peer, J. E., Kupper, Z., Long, J. D., Brekke, J. S. & Spaulding, W. D. (2007). Identifying mechanisms of treatment effects and recovery in rehabilitation of schizophrenia: longitudinal analytic methods. Clinical Psychology Review, 27(6), 696-714.

Long, J. D., Harring, J. R., Brekke, J. S., Test, M. A. & Greenberg, J. (2007). Longitudinal construct validity of Brief Symptom Inventory subscales in schizophrenia. Psychological Assessment, 19(3), 298-308.

Obradovic, J., Pardini, D. A., Long, J. D. & Loeber, R. (2007). Measuring interpersonal callousness in boys from childhood to adolescence: an examination of longitudinal invariance and temporal stability. Journal of Clinical Child and Adolescent Psychology, 36(3), 276-92.

Long, J. D. (2007). Ordinal level of measurement. In N. J. Salkin , N. J. Salkin (Eds.) Encyclopedia of Measurement & Statistics. Newbury Park, CA: Sage.

Siddappa, A. M., Rao, R., Long, J. D., Widness, J. A. & Georgieff, M. K. (2007). The assessment of newborn iron stores at birth: a review of the literature and standards for ferritin concentrations. Neonatology, 92(2), 73-82.

deRegnier, R. A., Long, J. D., Georgieff, M. K. & Nelson, C. A. (2007). Using event-related potentials to study perinatal nutrition and brain development in infants of diabetic mothers. Developmental Neuropsychology, 31(3), 379-96.

Webb, S. J., Long, J. D. & Nelson, C. A. (2005). A longitudinal investigation of visual event-related potentials in the first year of life. Developmental Science, 8(6), 605-16.

Test, M. A., Greenberg, J. S., Long, J. D., Brekke, J. S. & Burke, S. S. (2005). Construct validity of a measure of subjective satisfaction with life of adults with serious mental illness. Psychiatric Services (Washington, D.C.), 56(3), 292-300.

Masten, A. S., Roisman, G. I., Long, J. D., Burt, K. B., Obradovic, J., Riley, J. R., Boelcke-Stennes, K. & Tellegen, A. (2005). Developmental cascades: linking academic achievement and externalizing and internalizing symptoms over 20 years. Developmental Psychology, 41(5), 733-46.

Long, J. D. (2005). Omnibus hypothesis testing in dominance-based ordinal multiple regression. Psychological Methods, 10(3), 329-51.

Pellegrini, A. D., Long, J. D. & Mizerek, E. A. (2005). Sexual segregation in humans. In K. E. Ruckstuhl , P. Neuhaus & K. E. Ruckstuhl , P. Neuhaus (Eds.) Sexual Segregation in Vertebrates: Ecology of the Two Sexes. pp. 200-220. Cambridge: Cambridge University Press..

Beasley, T. M., Brand, J. P. & Long, J. D. (2005). The use of nonparametric procedures in the statistical analysis of microarray data. In D. B. Allison , G. P. Page & T. M. Beasley , J. D. Edwards , D. B. Allison , G. P. Page , T. M. Beasley , J. D. Edwards (Eds.) DNA Microarrays and Related Genomics Techniques: Design, Analysis, and Interpretation of Experiments. pp. 245-265. New York: CRC Press.

Frazier, P., Tashiro, T., Berman, M., Steger, M. & Long, J. (2004). Correlates of levels and patterns of positive life changes following sexual assault. Journal of Consulting and Clinical Psychology, 72(1), 19-30.

Black, L. S., deRegnier, R. A., Long, J., Georgieff, M. K. & Nelson, C. A. (2004). Electrographic imaging of recognition memory in 34-38 week gestation intrauterine growth restricted newborns. Experimental Neurology, 190 Suppl 1, S72-83.

Pellegrini, A. D., Long, J. D. (2004). Part of the solution and part of the problem: A dominance theory view of bullying and victimization during the transition from primary school through middle school. In D. Espalage , S. Swearer , D. Espalage , S. Swearer (Eds.) Bullying in American Schools: A Social Ecological Perspective on Prevention and Intervention. Mahwah, NJ: Erlbaum.

Masten, A. S., Burt, K. B., Roisman, G. I., Obradovic, J., Long, J. D. & Tellegen, A. (2004). Resources and resilience in the transition to adulthood: continuity and change. Development and Psychopathology, 16(4), 1071-94.

Pellegrini, A. D., Long, J. D. (2003). A sexual selection theory longitudinal analysis of sexual segregation and integration in early adolescence. Journal of Experimental Child Psychology, 85(3), 257-78.

Long, J. D., Feng, D. & Cliff, N. (2003). Ordinal analysis of behavioral data. In J. Schinka , W. F. Velicer & I. B. Weiner , J. Schinka , W. F. Velicer , I. B. Weiner (Eds.) Research Methods in Psychology. Volume 2 of Handbook of Psychology. pp. 635-662. New York: John Wiley & Sons.

Long, J. D., Pellegrini, A. D. (2003). Studying the change in dominance and bullying with linear mixed models. School Psychology Review, 32, 401-417.

Pellegrini, A. D., Long, J. D. (2002). A longitudinal study of bullying, dominance, and victimization during the transition from primary school through middle school. British Journal of Developmental Psychology, 20, 259-280.

Wuerker, A. K., Long, J. D., Haas, G. L. & Bellack, A. S. (2002). Interpersonal control, expressed emotion, and change in symptoms in families of persons with schizophrenia. Schizophrenia Research, 58(3-Feb), 281-92.

Brekke, J. S., Long, J. D. & Kay, D. D. (2002). The structure and invariance of a model of social functioning in schizophrenia. The Journal of Nervous and Mental Disease, 190(2), 63-72.

Brekke, J. S., Prindle, C., Bae, S. W. & Long, J. D. (2001). Risks for individuals with schizophrenia who are living in the community. Psychiatric Services (Washington, D.C.), 52(10), 1358-66.

Beasley, T. M., Long, J. D. & Natali, M. (2001). Validation of the Mathematics Anxiety Scale for Children: A confirmatory factor analysis measurement and evaluation in counseling and development.

Brekke, J. S., Long, J. D. (2000). Community-based psychosocial rehabilitation and prospective change in functional, clinical, and subjective experience variables in schizophrenia. Schizophrenia Bulletin, 26(3), 667-80.

Land, H., Long, J. D. (2000). The structure of coping in AIDS caregivers: A factor analytically derived measure. Journal of Applied Social Psychology, 30, 463-483.

Long, J. D. (1999). A confidence interval for ordinal multiple regression weights. Psychology Methods, 4, 315-330.

Brekke, J. S., Ansel, M., Long, J., Slade, E. & Weinstein, M. (1999). Intensity and continuity of services and functional outcomes in the rehabilitation of persons with schizophrenia. Psychiatric Services (Washington, D.C.), 50(2), 248-56.

Long, J. D. (1999). Kendall’s tau. In S. Kotz , C. B. Read , D. L. Banks , S. Kotz , C. B. Read , D. L. Banks (Eds.) Encyclopedia of Statistical Sciences, Volume 3. pp. 102-104. New York: John Wiley & Sons.

Long, J. D., Brekke, J. S. (1999). Longitudinal factor structure of the brief psychiatric rating scale in schizophrenia. Journal of Psychological Assessment, 11, 498-506.

Silverstein, M. s., Long, J. D. (1998). Trajectories of adult grandparent-grandchild relationshipd: a growth curve analysis over 23 years. Journal of Marriage and Family, 60, 912-923.

Long, J. D., Cliff, N. (1997). Confidence intervals for Kendall's tau. British Journal of Mathematical and Statistical Psychology, 50, 31-41.

Brekke, J. S., Long, J. D., Nesbitt, N. & Sobel, E. (1997). The impact of service characteristics on functional outcomes from community support programs for persons with schizophrenia: a growth curve analysis. Journal of Consulting and Clinical Psychology, 65(3), 464-75.

Collins, L., Graham, J., Long, J. D. & Hansen, W. (1994). Cross validation of latent class models of early substance use onset. Multivariate Behavioral Research, 29, 165-183.

Collins, L., Fidler, P., Wugalter, S. & Long, J. D. (1993). Goodness-of-fit testing for latent class models. Multivariate Behavioral Research, 28, 375-389.

Long, J. D., Wugalter, S. & Collins, L. (1993). Monte Carlo sampling as a tool for goodness-of-fit testing with latent class models. In Technical Report. pp. 93-7. Dept. of Psychology, University of Southern California..

Downing, N., Kim, J., Williams, J. K., Long, J. D., Mills, J. A. & Paulsen, J. S. WHODAS 2.0 in prodromal Huntington disease: Measures of functioning in neuropsychiatric disease. European Journal of Medical Genetics, 22, 958-963.