Research Papers - School of Psychology
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Publication Open Access Exploring the Similarities and Differences in Offender Characteristics Across Aspiring, Probable, and Successful Serial Homicide Offenders: The Importance of an Inclusive …(SocArXiv, 2019-01) Yaksic, E; Konikoff, D; Gordon, D; Mooney, R; Allely, C; De Silva, R; Matykiewicz, B; Smith-Inglis, M; Giannangelo, S. J; Daniels, S; Sarteschi, C. MThe current study examines potential serial homicide offenders (SHOs), a previously unacknowledged offender group comprised of aspiring and probable SHOs, and compares them to successful SHOs. Data on 17 aspiring, 46 probable, and 16 successful SHOs were collected. The study results indicate that potential serial killers share more in common with successful SHOs than they do with one-off homicide offenders. While there is overlap among these groups, there is insufficient evidence to suggest discreet transitions among categories or that being a potential SHO is the final step on a pathway towards becoming a successful SHO. Potential SHOs cannot reliably be thought of as prospective SHOs if all things were equal. An as yet identified factor, such as resiliency, still separates potential SHOs from successful SHOs. Early identification and timely intervention is important to interrupt impending murders by potential SHOs and halt them at this pivotal point in their developmental trajectory.Publication Open Access Detecting a decline in serial homicide: Have we banished the devil from the details?(Cogent, 2019-01-01) Yaksic, E; Allely, C; De Silva, R; Smith-Inglis, M; Konikoff, D; Konikoff, K; Gordon, D; Denisov, E; Keatley, D. AThe current research provides perspective regarding the true prevalence of serial murderers in modern society and addresses the conflict between the evidenced decline in serial homicide and the viewpoint that the phenomenon is increasing. The likelihood that serial murderers are responsible for most unresolved homicides and missing persons is examined in the context of a declining prevalence. A mixed methods approach was used, consisting of a review of a sample of unresolved homicides, a comparative analysis of the frequency of known serial homicide series and unresolved serial homicide series, and semi-structured interviews of experts. In failing to become serial killers, aspiring and probable serial killers and spree killers have impacted the rate of serial murder by not reaching their potential. The past decade contained almost half the cases (13%) that existed at the 1980s peak of serial homicide (27%). Only 282 (1.3%) strangled females made up the 22,444 unresolved homicides reviewed. Most expert respondents thought it unreasonable that any meaningful proportion of missing persons cases are victims of serial homicide. Technology, shifts in offending behavior, proactive law enforcement action, and vigilance of society have transformed serial killing and aids in viewing offenders as people impacted by societal shifts and cultural norms. The absence of narrative details inhibited some aspects of the review. An exhaustive listPublication Embargo How much damage do serial homicide offenders wrought while the innocent rot in prison? A tabulation of preventable deaths as outcomes of sentinel events(Routledge, 2021-01-02) Yaksic, E; Allred, T. B; Drakulic, C; Mooney, R; De Silva, R; Geyer, P; Wills, A; Comerford, C; Ranger, RThe criminal justice system has allowed serial homicide offenders (SHOs) to commit additional homicides by failing to identify them after their initial homicide. Recidivism has been possible in instances where the SHO benefited from the wrongful incarceration of an innocent person for one of their homicides. Data from the National Registry of Exonerations was utilized to tabulate the full extent of these sentinel events, defined as the number of deaths that could have been prevented. Additional research was conducted to identify where victims fell in the offender’s killing sequence. This ancillary data revealed the number of victims whose deaths could have been prevented had the offender been apprehended earlier in their series of homicides. Sixty-two SHOs were responsible for 249 deaths, 114 of which were committed after an innocent person was incarcerated for the SHO’s initial homicide. To prevent further loss of life, law enforcement must: act upon accurate information; lower the SHO evidentiary threshold; prevent personal bias from influencing investigative steps; obtain training in the behavior of SHOs; admit mistakes; and re-examine convictions if wrongdoing is suspected.Publication Embargo A heuristic study of the similarities and differences in offender characteristics across potential and successful serial sexual homicide offenders(researchgate.net, 2021-08) Yaksic, E; Harrison, M; Konikoff, D; Mooney, R; Allely, C; De Silva, R; Matykiewicz, B; Inglis, M; Giannangelo, S. J; Daniels, S; Sarteschi, C. MThis heuristic study examined potential serial sexual homicide offenders (SSHOs), an unacknowledged offender group comprised of aspiring and probable SSHOs, and compared them with successful SSHOs. Data were collected on six aspiring SSHOs who each failed a single homicide attempt, 16 probable SSHOs who committed 17 homicides in separate events, and 13 successful SSHOs who killed 90 victims in separate events. The study results indicate that while potential SSHOs share more in common with successful SSHOs than they do with single-victim nonsexual homicide offenders, and that there is an overlap between potential SSHOs and successful SSHOs, there is currently insufficient evidence to suggest that there are discreet transitions among categories. While few potential SSHOs strive to become successful SSHOs, this may be due to weak or nonexistent emotional triggers. Being a potential SSHO does not appear to be a predictable first step on a pathway towards becoming a successful SSHO, as potential SSHOs cannot reliably be thought of as prospective SSHOs if all things were equal. The present study could not foresee all potential SSHOs becoming successful ones. An as yet unidentified number of factors still appear to separate potential SSHOs from successful SSHOs.Publication Open Access A Meta-Analysis of Childhood Maltreatment in Relation to Psychopathic Traits(PsyArXiv, 2021-12-17) de Ruiter, C; Burghart, M; De Silva, R; Garcia, S. G; Mian, U; Walshe, E; Zouharova, VPsychopathy is a personality disorder characterized by a mix of traits belonging to four facets: affective (e.g., callous/lack of empathy), interpersonal (e.g., grandiosity), behavioral instability (e.g., impulsivity, poor behavioral controls), and social deviance (e.g., juvenile delinquency, criminal versatility). Several scholars have argued that early childhood maltreatment impacts the development of psychopathy, although views regarding its role in the four facets differ. We conducted a meta-analysis including 47 studies comprising a total of 349 effect sizes and 12,737 participants, to investigate the association between the four psychopathy facets and four types of child maltreatment: physical abuse, emotional abuse, neglect, and sexual abuse. We found support for a moderate link between overall psychopathy and childhood physical abuse, emotional abuse, and neglect, as well as overall childhood maltreatment. The link between psychopathy and childhood sexual abuse was small, but still significant. These associations were stronger for the behavioral and antisocial facets than for the affective and interpersonal facets of psychopathy, but nearly all associations were significant. Our findings are consistent with recently developed theories on the role of complex trauma in the development of severe personality disorders. Trauma-focused preventive and therapeutic interventions can provide further tests of the trauma-psychopathy hypothesis.Publication Embargo Toward minority resilience – an integrated qualitative analysis with trans and gender non-conforming interviewees in Sri Lanka(Emerald Publishing, 2025-04-08) De Silva, R; Henrich, S; de Silva, B.G. R; Maycock, M; Edirisooriya, C; Nagahawatta, K; Medawatta, WPurpose – This study aims to explore minority resilience of trans and gender non-confirming individuals within a non-Western, collectivist society in Sri Lanka. Design/methodology/approach – In total, 15 interviews were analyzed with the multi-method qualitative text and discourse analysis framework; by incorporating the depth of discourse analysis with the breadth of thematic analysis. Findings – Four narratives emerged (jealousy and competition; authentic expression; othered or shunned; and conditional acceptance), located at the convergence of the two interview foci, “group membership” and “level of support”. Study findings strengthen the Transgender Resilience Intervention Model with evidence from a non-Western context, highlighting unique findings from Sri Lanka. Research limitations/implications – The sample size, focus on one nationality, exclusion of minors and recruitment of participants with access to digital devices may limit generalizability of study findings. Some responses on autobiographical data required prompting by the researcher, and retrospective recollections may not be reliable. Originality/value – To the best of the authors’ knowledge, this research is one of the first studies in South Asia to explore minority resilience with trans and gender non-conforming individuals. The findings add to the growing body of South Asian scholarship and further expand the predominantly Global North literature by providing a collectivist perspective.