The Schaefer Lab
PUBLICATIONS
Peer Reviewed Scientific Articles
Zellers, S., Alexander, J., Ellingson, J. M., Schaefer, J. D., Corley, R. P., Iacono, W., Hewitt, J. K., Hopfer, C. J., McGue, M. K., & Vrieze, S. (2024). Limited psychological and social effects of lifetime cannabis use frequency: Evidence from a 30-year community study of 4,078 twins. Journal of Psychopathology and Clinical Science, 133(1), 115–128. doi: 10.1037/abn0000867
Padrutt, E. R., Harper, J., Schaefer, J. D., Nelson, K. M., McGue, M., Iacono, W. G., & Wilson, S. (2023). Pubertal timing and adolescent outcomes: Investigating explanations for associations with a genetically informed design. Journal of Child Psychology and Psychiatry, 64(8), 1232–1241. doi:10.1111/jcpp.13808
Schaefer, J.D., Nelson, K., Wilson, S. (2023) The effects of adolescent cannabis use on psychosocial functioning: A critical review of the evidence. Child and Adolescent Psychiatric Clinics of North America, 32(6), 43-55. doi: 10.1016/j.chc.2022.06.003
Schaefer, J.D., Cheng, T., Dunn, E.C. (2022). Sensitive periods in development and risk for psychiatric disorders and related endpoints: a systematic review of child maltreatment findings. The Lancet Psychiatry, 9(12), 978-991. doi: 10.1016/S2215-0366(22)00362-5
Deak, J., Clark, D., Liu, M., Schaefer, J.D., Jang, S., Durbin, C., Iacono, W., McGue, M., Vrieze, S., Hicks, B. (2022). Alcohol and nicotine polygenic scores are associated with the development of alcohol and nicotine use problems from adolescence through young adulthood. Addiction, 117, 1117-1127. doi: 10.1111/add.15697
Assari, S. & Schaefer, J.D. (2021) Parental educational attainment and frequency of marijuana use in youth: Hispanics’ diminished returns. Journal of Educational and Cultural Studies, 5(6), 47- 60.
Schaefer, J.D., Jang, S., Clark, D.A., Deak, J.D., Hicks, B.M., Iacono, W.G., Liu, M., McGue, M., Vrieze, S., Wilson, S. (2021) Associations between polygenic risk of substance use and use disorder and alcohol, cannabis, and nicotine use in adolescence and young adulthood in a longitudinal twin study. Psychological Medicine, 1-11. doi:10.1017/S0033291721004116
Polusny, M.A., Marquadt, C.A., Campbell, E.H., Filetti, C.R., Noel, V.V., Disner, S.G., Schaefer, J.D., Davenport, N., Lissek, S., Noorbaloochi, S., Sponheim, S.R., Erbes, C.R. (in press). Advancing Research on Mechanisms of Resilience (ARMOR) longitudinal cohort study of new military recruits: results from a feasibility pilot study. Research in Human Development, 18(3), 212-229. doi: 10.1080/15427609.2021.1964898
Hicks, B.M., Clark, D.A., Deak, J.D., Schaefer, J.D., Liu, M., Jang, S., Durbin, C.E., Johnson, W., Wilson, S., Iacono, W.G., McGue, M., Vrieze, S.I. (2021). Polygenic scores for smoking and educational attainment have independent influences on academic success and adjustment in adolescence and educational attainment in adulthood. PLOS ONE, 16(8):e0255348. doi: 10.1371/journal.pone.0255348
Schaefer, J.D., Jang, S., Vrieze, S., Iacono, W.G., McGue, M., Wilson, S. (2021). Adolescent cannabis use and adult psychoticism: A longitudinal co-twin control analysis using data from two cohorts. Journal of Abnormal Psychology, 130(7), 691-701. doi: 10.1037/abn0000701
Reuben, A., Arseneault, L., Beddows, A., Beevers, S.D., Caspi, A., Moffitt, T.E., Ambler, A.P., Latham, R.M., Newbury, J.B., Odgers, C.L., Schaefer, J.D., Fisher, H.L. (2021). Air pollution exposure in childhood and adolescence and psychopathology at the transition to adulthood. JAMA Network Open, 4(4):e217508. doi:10.1001/jamanetworkopen.2021.7508
Schaefer, J.D., Hamdi, N.R., Malone, S., Vrieze, S., Wilson, McGue, M., Iacono, W.G. (2021). Associations between adolescent cannabis use and young-adult functioning in three longitudinal twin studies. Proceedings of the National Academy of Sciences of the United States of America, 118(14), e2013180118. doi:10.1073/pnas.2013180118
Hicks, B.M., Clark, D.A., Deak, J.D., Liu, M., Durbin, E., Schaefer, J.D., Wilson, S., Iacono, W.G., McGue, M., Vrieze, S.I. (2021). Polygenic score for smoking is associated with externalizing psychopathology and disinhibited personality traits but not internalizing psychopathology in adolescence. Clinical Psychological Science, 9(6), 1205-1213. doi: 10.1177/21677026211002117
Schaefer, J.D. (2021) Enduring mental health: The high lifetime prevalence of psychiatric disorder and emerging science of persistent mental wellness. Journal of the American Academy of Child and Adolescent Psychiatry, 60(8), 955-957. doi: 10.1016/j.jaac.2021.01.004
Weissman, D.G., Bitran, D., Miller, A.B., Schaefer, J.D., Sheridan, M.A., McLaughlin, K.A. (2019). Difficulties with emotion regulation as a transdiagnostic mechanism linking child maltreatment with the emergence of psychopathology. Development and Psychopathology, 31(3), 899-915. doi: 10.1017/S0954579419000348
*Reuben, A., *Schaefer, J.D., Moffitt, T.E., Belsky, D.W., Broadbent, J., Harrington, H., Houts, R., Ramrakha, S., Poulton, R., Caspi, A. (2019). Association of childhood lead exposure with adult personality traits and lifelong mental health. JAMA Psychiatry, 76(4), 418-425. doi: 10.1001/jamapsychiatry.2018.4192
Schaefer, J.D. (2018). Use of hierarchical measures of psychopathology to capture the long (and wide) shadow of early deprivation in the Bucharest Early Intervention Project analysis. JAMA Psychiatry, 75(11), 1101-1102. doi:10.1001/jamapsychiatry.2018.2215
Schaefer, J.D., Moffitt, T.E., Arseneault, L., Danese, A., Fisher, H.L., Houts, R., Sheridan, M. A., Wertz, J., Caspi, A. (2018). Adolescent victimization and early-adult psychopathology: Approaching causal inference using a longitudinal twin study to rule out alternative non-causal explanations. Clinical Psychological Science, 6(3), 352-371. doi: 10.1177/2167702617741381
Belsky, D.W., Moffitt, T.E., Cohen, A.A., Corcoran, D.L., Levine, M.E., Prinz, J., Schaefer, J.D., Sugden, K., Williams, B., Poulton, R., Caspi, A. (2018). Eleven telomere, epigenetic clock, and biomarker-composite quantifications of biological aging: Do they measure the same thing? American Journal of Epidemiology, 187(6), 1220-1230. doi: 10.1093/aje/kwx346
*Schaefer, J.D., *Scult, M.A., Caspi, A., Belsky, D.W., Hariri, A.R., Harrington, M., Houts, R., Ramrakha, S. Poulton, R., Moffitt, T.E. (2017). Is low cognitive functioning a predictor or consequence of major depressive disorder? A test in two longitudinal birth cohorts. Development and Psychopathology, 1-15. doi: 10.1017/S095457941700164X
Schaefer, J.D., Caspi, A., Belsky, D.W., Harrington, H., Houts, R., Horwood, J., Hussong, A., Ramrakha, S., Poulton, R., Moffitt, T.E. (2017). Enduring mental health: prevalence and prediction. Journal of Abnormal Psychology, 126(2), 212-224. doi: 10.1037/abn0000232
Belsky, D.W., Caspi, A., Houts, R., Cohen, H., Corcoran, D., Danese, A., Harrington, H., Israel, S., Levine, M., Schaefer, J. D., Sugden, K., Williams, B., Yashin, A., Poulton, R., Moffitt, T. E. (2015). Quantification of biological aging in young adults. Proceedings of the National Academy of Sciences, 112(30): E4104-10.
doi: 10.1073/pnas.1506264112
Schaefer, J.D., Caspi, A., Belsky, D., Harrington, H., Houts, R., Israel, S., Levine, M., Sugden, K., Williams, B., Poulton, R., Moffitt, T. E. (2015). Early-life intelligence predicts midlife biological age. The Journal of Gerontology: Psychological Sciences, 1-8. doi: 10.1093/geronb/gbv035.
Schaefer, J., Giangrande, E., Weinberger, D.R., Dickinson, D. (2013). The global cognitive impairment in schizophrenia: Consistent over decades and around the world. Schizophrenia Research, 150(1): 42-50. doi: 10.1016/j.schres.2013.07.009
Book Chapters
Dickinson, D., Schaefer, J., Weinberger, D.R. (2013). The multi-faceted “global” cognitive impairment profile in schizophrenia. In P.D. Harvey (Ed.), Cognitive Impairment in Schizophrenia: Characteristics, Assessment, and Treatment. Cambridge, UK: Cambridge University Press.
Other Public Output
Schaefer, J.D. (2021, February 16) If you stay mentally well your entire life, you’re not normal. Aeon: Psyche. https://psyche.co/ideas/if-you-stay-mentally-well-your-entire-life-youre-not-normal
2. Reuben, A., Schaefer, J. (2017, July 14) Mental illness is far more common than we knew. Scientific American: Observations. https://blogs.scientificamerican.com/observations/mental-illness-is-farmore-common-than-we-knew/#
1. Schaefer, J.D. (2017). Is “abnormal psychology” really all that abnormal? American Psychological Association, Society of Clinical Psychology: Clinical Bulletin. http://www.div12.org/isabnormal-psychology-really-all-that-abnormal