We strive to advance the development and collaboration of the psychological and judicial field in Finland with our research and publications. The starting point of our research is to serve the means and goals of our firm’s client work.  Because of this we always do our research on the basis of the practical work. A part of our research is done in collaboration with researchers from outside of our firm and with the institution of behavioural sciences at the University of Helsinki. Therefore we encourage students of psychology and law to be in touch with us regarding possible research collaboration.

PsyJuridica follows the guidelines concerning ethical scientific practice in Finland set by the Ministry of Education and Culture and the Finnish Advisory Board on Research Integrity.



Häkkänen-Nyholm, H., Laajasalo, T., Tuuri, T. (2013). Lapsen vieraannuttaminen vanhemmasta: Toimintatavat ja niiden vaikutus lapsen ja vanhemman hyvinvointiin.  Helsinki: Unigrafia.

The publication is the first Nordic research concerning the child's alienation from a parent based on empirical studies. The publication is based on research done by PsyJuridica Ltd. in collaboration with the institution of behavioural sciences at the University of Helsinki. 101 parents that had gone through a divorce or separation and had been exposed to alienation from their child answered a questionnaire online. The questionnaire looked into the ways that had been used to alienate the parent and how that had affected the child and the targeted parent. The publication includes a large review of scientific research from abroad concerning alienation. In the reflection part of the publication many questions arise concerning the functionality of the social services, how alienation is handled and how it's acknowledged while dealing with custody battles.


Psychopathy and Law: A Practitioners Guide is a book edited by Helinä Häkkänen-Nyholm and Jan-Olof Nyholm which gives theoretical and practical information about psychopathy to people who have been forced to face psychopaths in their life. More than 20 Finnish and foreign experts of psychopathy have participated in writing the book. It includes many practical examples. The chapters cover the history of psychopathy, evaluating psychopathy, psychopathy in prisons, the brain functions of a psychopath, the psychopathy of women and children, psychopathy and violence, psychopathy in white-collar crimes, interrogating a psychopath and psychopathy in a family, amongst other subjects. The publishing editor of the book is John Wiley&Sons. You can buy the book for example from Amazon.


Psykopatia is a book edited by Helinä Häkkänen-Nyholm and published by Edita. The book is the first Finnish textbook on psychopathy. It is used as a textbook in university studies on psychology, but it's also suited for people who want to learn more about psychopathy due to their situation in life. Several Finnish experts and clinicians with a broad experience of psychopathy have participated in writing the book. You can order the book at Edita, and Stockmann.

Dr. Häkkänen-Nyholm has authored and co-authored over 50 scientific articles and book chapters. Some of these are:

O'Toole, M. E., Folino, J., Garbarino, J., Gorelick, S. M., Häkkänen-Nyholm, H., Meloy, R., Samenow, S. E., Nishimura, Y. S. (2014). Why Do Young Males Attack Schools? Seven Discipline Leaders Share Their Perspectives. Violence and Gender, 1(1), 13-18.

Häkkänen-Nyholm, H. & Hare, R.D. (2009). Psychopathy, homicide, and the courts: Working the System. Criminal Justice & Behavior, 36(8), 761-777.

Häkkänen, H. (2010). Stalking. In Brown, J. & Campbell, L. (Eds.). Cambridge Handbook of Forensic Psychology. Cambridge University Press.

Häkkänen-Nyholm, H. (2010). Stalking. In Granhag, P-A (Ed). Forensic Psychology in context: Nordic and International approaches. Willan Publishing.

Putkonen, H., Weizmann-Henelius, G., Lindberg, N., Rovamo, T., & Häkkänen-Nyholm, H. (2011). Gender differences in homicide offender's criminal career, substance abuse and mental health care. A nationwide register-based study of Finnish homicide offenders 1995-2004. Criminal Behaviour and Mental Health, 21, 51-62.

Weizmann-Henelius, G., Grönroos, M., Putkonen, H., Eronen, M., Lindberg, Nina., & Häkkänen-Nyholm, H., (2010). Psychopathy and gender differences in childhood psychosocial characteristics in homicide offenders - a nationwide register-based study. Journal of Forensic Psychiatry and Psychology.

For a full list of Dr. Häkkänen-Nyholm's publications and the publication of her research group at the University of Helsinki, please see: