ProfessorWayne Welsh
541 Gladfelter Hall


Violence, Corrections, Substance Abuse Treatment, Organizational Change, Implementation Science


My research interests include violence, corrections, substance abuse treatment, and organizational change in both adult and juvenile settings. I am author of Counties in Court: Jail Overcrowding and Court-Ordered Reform (Temple University Press, 1995), Criminal Justice Policy and Planning, with Philip Harris (Elsevier, 2013, 4th Ed.), and Criminal Violence: Patterns, Causes and Prevention, co-authored with Marc Riedel (Oxford, 2015, 4th Ed.). I am currently Co-PI on JJ-TRIALS (Juvenile Justice – Translational Research on Interventions for Adolescents in the Legal System), a national multi-site study (National Institute on Drug Abuse, 2013-2017) to investigate and improve implementation of evidence practices for drug-involved youth in the juvenile system. I was Co-Investigator on CJ-DATS2 (Criminal Justice Drug Abuse Treatment Systems), a national, collaborative research project (National Institute on Drug Abuse, 2009-14).

Key research questions addressed organizational and systems issues related to implementation of effective drug treatment and other services in adult criminal justice settings. I was Lead Researcher for our research center on two of three multisite protocols: Medication Assisted Treatment Implementation in Community Correctional Environments (MATICCE), and the Organizational Process improvement intervention (OPII). I’ve been PI on several other large, multi-site research projects conducted as part of a long term research partnership with the PA Dept. of Corrections which began in 1998 and continues to the present. Funded projects include: “A Multi-Site Evaluation of Prison-Based Drug Treatment: A Research Partnership Between the Pennsylvania Department of Corrections and Temple University” (Pennsylvania Commission on Crime and Delinquency; 2005-08); “Evaluation of Drug Treatment Programs at the State Correctional Institution (SCI) at Chester: A Partnership Between the Pennsylvania Department of Corrections, Gaudenzia, Inc., and Temple University” (National Institute of Justice, 2002-06); “Evaluation of Prison based Drug Treatment in Pennsylvania: A Research Collaboration Between the Pennsylvania Department of Corrections and the Center for Public Policy at Temple University” (National Institute of Justice, 2000-02); and “Building An Effective Research Collaboration Between the Center for Public Policy at Temple University and the Pennsylvania Department of Corrections” (National Institute of Justice, 1998-2000).

Other funded projects include “Building a Culture and Climate of Safety in Public Schools: School-Based Management and Violence Reduction in Philadelphia” (National Institute of Justice, (1993-95) and “Reducing Over-Representation of Minorities in the Juvenile Justice System” (Pennsylvania Commission on Crime and Delinquency, 1994-96). Service to the community includes volunteer participation on the Philadelphia Mayor`s Reentry Task Force and the Philadelphia Children`s Round Table (chaired by the Philadelphia Family Court President). I also serve on the Editorial Advisory Board for the Prison Journal, the oldest, peer-reviewed journal publishing research on adult and juvenile confinement, treatment interventions, and alternative sanctions.

Selected Publications

  • Prendergast, M., Welsh, W. N., Stein, L., et al. (Published online Aug. 24, 2016). Influence of organizational characteristics on success in implementing process improvement goals in correctional treatment settings. Journal of Behavioral Health Services & Research. DOI: 10.1007/s11414-016-9531-x.
  • Monico, L.B., Mitchell, S.G., Welsh, W.N., Link, N., Hamilton, L., Redden, S.M., Schwartz, R.P., & Friedmann, P.D. (2016). Developing effective interorganizational relationships between community corrections and community treatment providers. Journal of Offender Rehabilitation, 55(7): 484-501, DOI: 10.1080/10509674.2016.1218401
  • Kelley, C.E. & Welsh, W.N. (2016). Examining climate across prison-based substance abuse treatment groups. Substance Use & Misuse. 51(7): 902-911. DOI: 10.3109/10826084.2016.1155621
  • Welsh, W. N., Prendergast, M., Knight, K., et al. (2016). Correlates of interorganizational service coordination in community corrections. Criminal Justice and Behavior 43(4): 483-505. DOI: 10.1177/0093854815607306
  • Welsh, W. N., Knudsen, H. K., Knight, K., et al.(2016). Effects of an organizational linkage intervention on inter-organizational service coordination between probation/parole agencies and community treatment providers. Administration and Policy in Mental Health and Mental Health Services Research 43(1): 105-121. PubMed PMID: 25559124. DOI: 10.1007/s10488-014-0623-8.
  • Welsh, W.N. et al. (2015). Effects of a strategy to improve offender assessment practices: Staff perceptions of implementation outcomes. Drug and Alcohol Dependence. DOI:
  • Welsh, W.N. et al. (2015). Effects of an Organizational Linkage Intervention on Inter-Organizational Service Coordination Between Probation/Parole Agencies and Community Treatment Providers. Administration and Policy in Mental Health and Mental Health Services Research. DOI: 10.1007/s10488-014-0623-8.
  • Welsh, W.N., & Harding, C. (2015). School effects on delinquent behavior. In: M. Krohn & J. Lane (Eds.), Handbook on Juvenile Delinquency and Juvenile Justice. John Wiley & Sons: Hoboken, NJ.
  • Friedmann P.D., Wilson, D., Knudsen, H., Ducharme, L., Welsh, W., et al. (2015). Effect of an organizational linkage intervention on staff perceptions of medication-assisted treatment and referral intentions in community corrections. Journal of Substance Abuse Treatment, 50, 50–58.
  • Welsh, W.N., Zajac, G., & Bucklen, K. (2014). For whom does prison based drug treatment work? Results from a randomized experiment. Journal of Experimental Criminology 10(2):151-177. DOI 10.1007/s11292-013-9194-z.
  • Houser, K. & Welsh, W. (2014). Examining the association between co-occurring disorders and seriousness of misconduct by female prison inmates. Criminal Justice and Behavior 41:650-666.
  • Shafer, M.S., Prendergast, M., Melnick, G., Stein, L.A., Welsh, W.N. et al. (2014). A cluster randomized trial of an organizational process improvement intervention for improving the assessment and case planning of offenders: a Study Protocol. Health and Justice 2:1 (8 January 2014) DOI: 10.1186/2194-7899-2-1
  • Friedmann, P.D., Ducharme, L.J., Welsh, W., et al. (2013). A cluster randomized trial of an organizational linkage intervention for offenders with substance use disorders: Study protocol. Health and Justice 1:6 (19 December 2013) DOI: 10.1186/2194-7899-1-6.
  • Welsh, W.N. & Zajac, G. (2013). A Multi-Site Evaluation of Prison-Based Drug Treatment: Four-Year Follow-up Results. The Prison Journal 93(3): 251-271.
  • Stahler, G. Mennis, J., Belenko, S., Welsh, W., Hiller, M., & Zajac. G. (2013). Predicting Recidivism for Released State Prison Offenders: Examining the Influence of Individual and Neighborhood Characteristics and Spatial Contagion on the Likelihood of Reincarceration. Criminal Justice and Behavior 40(6): 690-711.
  • Freidmann, P., Hoskinson, R., Gordon, M., Schwartz, R., Kinlock, T., Knight, K., Flynn, P.M., Welsh, W.N., et al. (2012). Medication-assisted treatment in criminal justice settings affiliated with the Criminal Justice Drug Abuse Treatment Studies (CJ-DATS): Availability, barriers and intentions. Substance Abuse 33:9-18.
  • Houser, K.A., Salvatore, C., & Welsh, W.N. (2012). Individual level predictors of community aftercare completion. The Prison Journal 92: 106-124.
  • Welsh, W.N. (2010). Inmate responses to prison-based drug treatment: A repeated measures analysis. Drug and Alcohol Dependence 109:37-44.
  • Welsh, W.N. (2010). Prison-based substance-abuse programs. In: Gideon, L. and Sung, H. (Eds.), Rethinking corrections: Rehabilitation, reintegration and reentry (pp. 157-192). Thousand Oaks, CA: Sage.
  • Welsh, W.N. and P.N. McGrain. (2008). Predictors of therapeutic engagement in prison-based drug treatment. Drug and Alcohol Dependence 96:271–280.
  • Kelly, C.E. and Welsh, W.N. (2008). The Predictive Validity of the Level of Service Inventory-Revised for Drug-Involved Offenders. Criminal Justice and Behavior 35:819-831.
  • Welsh, W.N. (2007). “A Multi-Site Evaluation of Prison-Based TC Drug Treatment.” Criminal Justice and Behavior 34:1481-1498.
  • Welsh, W.N., P. McGrain, N. Salamatin, and G. Zajac. (2007). Effects of Prison Drug Treatment on Inmate Misconduct: A Repeated Measures Analysis. Criminal Justice and Behavior 34: 600-615.
  • Welsh, W.N. (2006). The Need for a Comprehensive Approach to Program Planning, Development, and Evaluation. Criminology and Public Policy 5:603-614.

Courses Taught

  • CJ 1001 Introduction to Criminal Justice (UG)
  • CJ 2696 Planned Change in Criminal Justice (UG)
  • CJ 3402 Environmental Criminology (UG)
  • CJ 4402 Violence, Crime and Justice (UG)
  • CJ 8205 Aggression and Violence (G)
  • CJ 8302 Advanced Research Methods in Criminal Justice (G)
  • CJ 8310 Special Topics Seminar: Crime and the Life Course (G)
  • CJ 8225 Rehabilitation, Reentry, and Recidivism (G)
  • CJ 8235 Criminal Justice Organizations: Structure, Process and Change (G)