Dr. Katrin Müller-Johnson

Senior Lecturer in Applied Criminology

Dipl. Psych., Free University of Berlin, Germany, 1999
MSt Legal Research, Oxford University, UK, 2000
Ph.D. Human Development, Cornell University, USA, 2005

Dr. Mueller-Johnson's research concentrates on victimisation, investigative interviewing and police and legal decision-making.

Within the area of victimisation her main focus is on sexual offences, such as in child sexual abuse or rape. Her research into investigative interviewing is connected to this interest in sexual victimisation as in sexual offences there is often little evidence apart from the victim statement and thus the victim's testimony is of crucial importance. Dr Mueller-Johnson studies police interviewing of vulnerable witnesses, such as the investigative interviewing of children, older adults, or persons with disabilities. One major area of this research is on ways to improve the quality of police interviews. Within that she currently studies the effects of matching the time of day of the interview to the interviewee's chronotype. She also investigates the effects of cognitive aging on eyewitness testimony and how to enhance older witnesses' performance using knowledge from applied cognitive gerontology. Her research on decision-making in the criminal justice context spans police as well as jury and judges' decision-making. Information on an AHRC grant investigating jurors' interpretations of standards of proof can be found on the project archive website.

Her work has been funded by the AHRC, British Academy, Newton Trust, Optimus Foundation and Department of Justice for Northern Ireland. She has collaborated with UK and international police forces. Dr. Mueller-Johnson is part of the Violence Research Centre.

She teaches research methods, legal and criminological psychology, victimology as well as criminological theory.

Selected Publications:


  • Mueller-Johnson, K. (2017). Cyber-Grooming. In Rueegger, P., Gysi, J (eds): Kompendium zur sexualisierten Gewalt, 63-72. Bern, CH: Hogrefe.
  • Obsuth, I., Mueller-Johnson, K., Murray, A., & Eisner, M (2017). Violent poly-victimisation over time: A longitudinal examination of the prevalence and patterns of physical and emotional victimisation throughout adolescence (11-17 years). Journal of Research on Adolescence.
  • Mueller-Johnson, K., Eisner, M.P. & Obsuth, I. (2014). Sexual victimization of youth with a physical disability: An examination of the prevalence rates, risk and protective factors. Journal of Interpersonal Violence, 29(17): 3180-3206.
  • Lundrigan, S. & Mueller-Johnson, K. (2013) Male Stranger Rape: A Behavioural Model of Victim-Offender Interaction. Criminal Justice and Behavior, doi:10.1177/0093854812474451.
  • Averdijk, M., Mueller-Johnson, K., Eisner, M. (2011) Sexual Victimisation of children and adolescents in Switzerland. Final Report for the UBS Optimus Foundation, available at:

Eyewitness Psychology and Investigative Interviewing

  • Kulkofsky, S., Wang Q., Conway, M., Hou, Y., Aydin, C., Mueller-Johnson, K., & Williams, H. (2011). Cultural Variation in the Correlates of Flashbulb Memories: An Investigation in Five Countries. Memory, 19, 3, 233-240.
  • Mueller-Johnson, K., (2009). Older Adults as Witnesses in Court. In Jamieson, A., Moenssens, A. (Ed). Wiley Encyclopedia of Forensic Science. Chichester: John Wiley Sons Limited.
  • Mueller-Johnson, K. (2009). Ältere Menschen als Zeugen vor Gericht. Forensische Psychiatrie, Psychology und Kriminologie. 3, 3, 163- 170.
  • Gilstrap, L.L., Laub, C., Zierten, E.A. & Mueller-Johnson, K. (2008). The effects of adult suggestion and child consistency on young children's reports. Journal of Applied Social Psychology, 38, 7, 1905-1920.
  • Mueller-Johnson, K., Toglia, M.P., Sweeney, C.D., Ceci, S.J. (2007) The perceived credibility of older adults as witnesses and its relation to ageism. Behavioral Sciences and the Law, 25, 355-375.
  • Mueller-Johnson, K. & Ceci, S.J. (2007). The elderly eyewitness: A review and prospectus. In Toglia, M.P., Read, D.J., Ross, D.F., Lindsay, R.C.L., (Eds.). The Handbook of Eyewitness Psychology: Volume 1 Memory for Events, 577-603, Mahwah, NJ: Lawrence Erlbaum Associates, Inc.
  • Mueller-Johnson, K. & Ceci, S. J. (2005). Zur suggestiven Beeinflussbarkeit von älteren Menschen (On the suggestibility of older adults). In K.-P.Dahle, R. Volbert (Eds.), Entwicklungspsychologische Aspekte der Rechtspsychologie. (Developmental aspects of legal psychology), 318-329. Goettingen: Hogrefe.
  • Mueller-Johnson, K. & Ceci, S.J.(2004). Memory and suggestibility in older adults: Live event participation and repeated interview. Applied Cognitive Psychology, 18, 8, (1109-1127).

Decision-Making within the Criminal Justice Context

  • Mueller-Johnson, K., Dhami, M. K. & Lundrigan, S. (2017). Jurors’ interpretation of beyond reasonable doubt instructions. Psychology, Crime and Law. DOI: 10.1080/1068316X.2017.1394461
  • Dhami, M. K., Lundrigan, S., & Mueller-Johnson, K. (2015). Instructions on reasonable doubt: defining the standard of proof and the juror's task. Psychology, Public Policy and Law, 21, 169-178.
  • Lundrigan, S., Dhami, M.K., Mueller-Johnson, K. (2013). Predicting Verdicts using Pre-Trial Attitudes and Standards of Proof. Legal and Criminological Psychology, DOI: 10.1111/lcrp.12043.
  • Leeney, D.G. & Mueller-Johnson, K. (2012): Examining the forensic quality of police call-centre interviews, Psychology, Crime & Law, 18, 7, 669-688.
  • Mueller-Johnson, K. & Dhami, M. K. (2010). Effects of offenders' age and health on sentencing decisions. The Journal of Social Psychology, 150, 1, 77-97.
  • Leeney, D. G. & Mueller-Johnson, K. (2010). Examining the link between forensic quality and customer service quality of police call centre interviews. International Journal of Police Science and Management, 12, 1, 69-80.
  • Kautt, P.M. & Mueller-Johnson, K. (2009). Cross-jurisdictional disposition variability under sentencing guidelines: The example of equivalent sex offenses. Criminal Justice Review, 34, 3, 350-381.
  • Coates, S, Kautt, P.M. & Mueller-Johnson, K. (2009). Fixed Penality Notices. Journal of Experimental Criminology, 5, 399-428.