Research Interests

Epidemiology of youthful drug use and its correlates; natural history of non-medical drug use; substance use and comorbid psychiatric disorders; substance abuse prevention theory and practice; health behavior theory.

Selected Professional Activities

2006 – Present: College on Problems of Drug Dependence - Regular Member

2010 – 2013: Editorial Review Board, Journal of Psychoactive Drugs

Selected Peer-Reviewed Publications

Falck R, Nahhas RW, Li L, Carlson RG. (2012) Surveying teens in school to assess the prevalence of problematic drug use. Journal of School Health, 82(5):217-224.

Daniulaityte R, Falck R, Carlson RG. (2012) Illicit buprenorphine use in a community sample of young adult non-medical users of pharmaceutical opioids. Drug and Alcohol Dependence, 122(3):210-207.

Daniulaityte R, Falck R, Li L, Nahhas RW, Carlson RG. (2012) Respondent-driven sampling to recruit young adult non-medical users of pharmaceutical opioids: problems and solutions. Drug and Alcohol Dependence, 121(1-2):23-29.

Carlson R, Sexton R, Wang J, Falck R, Leukefeld C, Booth B. (2010) Predictors of substance abuse treatment entry among rural illicit stimulant users in Ohio, Arkansas, and Kentucky. Substance Abuse, 31(1):1-7.

Falck R, Wang J, Carlson R. (2008) Among long-term crack users, who avoids and who succumbs to addiction? Drug and Alcohol Dependence, 98(1-2): 24-29.

Falck R, Wang J, Carlson R. (2008) Depressive symptomatology in young adults with a history of MDMA use: a longitudinal analysis. Journal of Psychopharmacology, 22(1): 47-54.

Falck, R., Wang, J., Carlson, R. (2007) Health status of illicit stimulant drug users in rural Ohio. Journal of Psychoactive Drugs, SARC Supplement No. 4:401-405.

Falck R, Wang J, Carlson R, Krishnan L, Leukefeld C, Booth B. (2007) Perceived need for substance abuse treatment among illicit stimulant drug users in rural areas of Ohio, Arkansas, and Kentucky. Drug and Alcohol Dependence, 91(2):107-114.

Falck R, Wang J, Carlson R. (2007) Crack cocaine trajectories among users in a midwestern American city. Addiction, 102(9):1421-1431.

Falck R, Li L, Carlson R, Wang J. (2006) The prevalence of dextromethorphan abuse among high school students. Pediatrics, 118(5):2267-2269. [research letter]

Booth B, Leukefeld C, Falck R, Wang J, Carlson R. (2006) Correlates of rural methamphetamine and cocaine users: results from a multisite community study. Journal of Studies on Alcohol, 67(4):493-501.

Falck R, Carlson R, Wang J, Siegal H. (2006) Psychiatric disorders and their correlates among young adult MDMA users in Ohio. Journal of Psychoactive Drugs, 38(1):19-29.

Falck R, Wang J, Carlson R, Siegal H. (2006) Prevalence and correlates of current depressive symptomatology among a community sample of MDMA users in Ohio. Addictive Behaviors, 31(1):90-101.

Siegal H, Falck R, Wang J, Carlson R, Massimino KP. (2006) Emergency department utilization by crack-cocaine smokers in Dayton, Ohio. American Journal of Drug and Alcohol Abuse, 32(1):55-68.

Siegal H, Draus P, Carlson R, Falck R, Wang J. (2006) Perspectives on health among adult users of illicit stimulant drugs in rural Ohio. Journal of Rural Health, 22(2):169-173.

Carlson R, Wang J, Falck R, Siegal H. (2005) Drug use practices among MDMA/ecstasy users in Ohio: a latent class analysis. Drug and Alcohol Dependence, 79(2):167-179.

Falck R, Siegal H, Wang J, Carlson R, Draus P. (2005) Non-medical drug use among stimulant-using adults in small towns in rural Ohio. Journal of Substance Abuse Treatment, 28(4):341-349.

Wang J, Carlson R, Falck R, Siegal H, Rahman A, Li L. (2005) Respondent-driven sampling to recruit MDMA users: a methodological assessment. Drug and Alcohol Dependence, 78(2):147-157.

Draus P, Siegal H, Carlson R, Falck R, Wang J. (2005) Cracking the cornfields: recruiting illicit stimulant drug users in rural Ohio. Sociological Quarterly, 46(1):165-189.

Falck R, Wang J, Siegal H, Carlson R. (2004) The prevalence of psychiatric disorder among a community sample of crack-cocaine users: an exploratory study with practical implications. Journal of Nervous and Mental Disease, 192(7):503-507.

Falck R, Carlson R, Wang J, Siegal H. (2004) Sources of information about MDMA (3,4-methylenedioxymethamphetamine): perceived accuracy, importance, and implications for prevention among young adult users. Drug and Alcohol Dependence, 74(1):45-54.

Falck R, Wang J, Siegal H, Carlson R. (2003) Current health problems among a community sample of crack-cocaine users in Ohio. Journal of Psychoactive Drugs, 35(4):471-478.

Falck R, Wang J, Carlson R, Siegal H. (2002) Variability in drug use prevalence across school districts in the same locale in Ohio. Journal of School Health, 72(7):288-293.

Falck R, Wang J, Carlson R, Eddy M, Siegal H. (2002) The prevalence and correlates of depressive symptomatology among a community sample of crack-cocaine smokers. Journal of Psychoactive Drugs, 34(3):281-288.

Siegal H, Falck R, Wang J, Carlson R. (2002) Predictors of drug abuse treatment entry among crack-cocaine smokers. Drug and Alcohol Dependence, 68(2):159-166.

Falck R, Wang J, Carlson R, Siegal H. (2001) The epidemiology of physical attack and rape among crack-using women. Violence and Victims, 16(1):79-89.

Falck R, Wang J, Siegal H, Carlson R. (2000) Longitudinal application of the Medical Outcomes Study 36-item short form health survey with not-in-treatment crack-cocaine users. Medical Care, 39(9):902-910.

Carlson R, Falck R, Siegal H. (2000) Crack-cocaine injection in the heartland: an ethnographic perspective. Medical Anthropology, 18:305-323.

Falck R, Siegal H, Wang J, Carlson R. (1999) Differences in drug use among rural and suburban high school students in Ohio. Substance Use and Misuse, 34(4 & 5):567-577.

Falck R, Wang J, Carlson R, Siegal H. (1997) Factors influencing condom use among heterosexual users of injection drugs and crack cocaine. Sexually Transmitted Diseases, 24(4):204-210.

Falck R, Ashery R, Carlson R, Wang J, Siegal H. (1995) Injection drug users, crack smokers, and the use of human services. Social Work Research, 19(3):164-173.

Falck R, Siegal H, Wang J, Carlson R. (1995) Usefulness of the health belief model in predicting HIV needle risk practices among injection drug users. AIDS Education and Prevention, 7(6):523-533.

Ashery R, Carlson R, Falck R, Siegal H, Wang J. (1995) Female condom use among injection drug- and crack cocaine-using women. American Journal of Public Health, 85(5):736-737. [research letter]

Siegal H, Carlson R, Falck R, Wang J. (1995) Drug abuse treatment experience and HIV risk behaviors among active drug injectors in Ohio. American Journal of Public Health, 85(1):105-108.

Falck R, Carlson R, Price S, Turner J. (1994) Case management to enhance HIV risk reduction among users of injection drugs and crack cocaine. Journal of Case Management, 3(4):162-166.

Carlson R, Wang J, Siegal H, Falck R, Guo J. (1994) An ethnographic approach to targeted sampling: problems and solutions in AIDS prevention research among injection drug and crack-cocaine users. Human Organization, 53(3):279-286.

Falck R, Siegal H, Forney M, Wang J, Carlson R. (1992) The validity of injection drug users self-reported use of opiates and cocaine. Journal of Drug Issues, 22(4):823-832.

Siegal H, Carlson R, Falck R, Li L, Forney M, Rapp R, Baumgartner K, Myers W, Nelson M. (1991) HIV infection and risk behaviors among intravenous drug users in low seroprevalence areas in the Midwest. American Journal of Public Health, 81(12):1642-1644.

Falck R, Craig R. (1988) Classroom-oriented, primary prevention programming for drug abuse. Journal of Psychoactive Drugs, 20(4):403-408.

Falck R. (1981) The evolution of a community-based drug analysis program. Journal of Psychoactive Drugs, 13(4):381-383.

Falck R, Seal M. (1980) Street drug misrepresentation. Journal of the American Medical Association, 244(4):332. [research letter]

Sigell L, Kapp F, Fusaro G, Nelson D, Falck R. (1978) Popping and snorting volatile nitrites: a current fad for getting high. American Journal of Psychiatry, 135(10):1216-1218.

Selected Other Publications

Falck R, Carlson R, Siegal H. (2000) Turning Point – HIV Risk Reduction for Injection Drug Users and Their Sex Partners. Sociometrics Corporation: Los Altos, CA.

Siegal H, Carlson R, Falck R, Wang J. (2000) Drug-using MSM focus groups: Dayton and Columbus, Ohio. In: Rhodes F, Deren S, Cottler L, Siegal H, Stark M, Reich W and the DUMSM Multisite Research Consortium (eds.) A Multisite Study of HIV Risks in Drug-Using Men Who Have Sex with Men, pp. 7-27. The University Press: Long Beach CA.

Carlson R, Siegal H, Falck R. (1995) Qualitative research methods in drug abuse and AIDS prevention research: an overview. In: Lambert E, Ashery R & Needle R (eds.) Qualitative Methods in Drug Abuse and HIV Research, pp. 6-26. National Institute on Drug Abuse Research Monograph 157, NIH Publication No. 95-4025, Rockville MD.

Siegal H, Carlson R, Falck R. (1993) HIV infection/serostatus—outside epicenters. In: Brown B & Beschner G (eds.) Handbook on Risk of AIDS—Injection Drug Users and Sexual Partners, pp. 38-71. Greenwood Press: Westport CT.

Falck R, Siegal H, Carlson R. (1992) Case management to enhance AIDS risk reduction: practical and philosophical considerations. In: Ashery R. (ed.) Progress and Issues in Case Management, pp. 167-180. National Institute on Drug Abuse Research Monograph Series No. 127, DHHS: Washington, DC.