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Background: Accumulating evidence internationally points to an increased risk of crime perpetration and victimization among people with an intellectual disability (ID). This study aimed to examine the impact that comorbid mental illness had on the association between intellectual disability, crime perpetration and criminal victimization. Method: A case linkage methodology involving 2,220 individuals with an intellectual disability from an Australian State. Results: One in four (27%) had contacts with public mental health services; 8.2% had a comorbid mental illness. This "dual disability" group was between 2.97 and 3.22 times more likely than those with intellectual disability alone to have a history of criminal charges, and between 2.76 and 2.97 times more likely to have been a victim of crime. Conclusions: The extent of criminality and victimization found among people with dual disability indicates a potentially multiply stigmatized group for whom the need for a coordinated cross-agency service response remains paramount.

A large proportion of forensic mental health (FMH) inpatients experience cognitive impairments, which may impact the extent to which they benefit from interventions aimed at reducing their risk of recidivism. These impairments should be identified and responded to as quickly and accurately as possible. The current study explored when and how FMH inpatients' cognition is assessed during their stay at a forensic hospital, with a cognitive profile being constructed of the sample. The medical files of inpatients who resided at the hospital in Melbourne (Australia) during January 2016 and December 2019 were reviewed retrospectively. A total of 99 medical files were identified. The type, timing and results of each cognitive assessment were collected. Frequency analysis revealed more than half of the sample received a cognitive assessment, with most of the cognitive assessments being conducted within the first year of an inpatient's admission to hospital. Between 19% and 31% of inpatients with available cognitive data demonstrated a global cognitive impairment, depending on the cognitive measure being used. These results highlight the value of assessing FMH inpatients for cognitive impairments to respond to them appropriately to increase their chances of rehabilitation. Careful consideration should be given to the type of cognitive assessment tool used among this demographic. [ABSTRACT FROM AUTHOR]

Posttraining rapid eye movement (REM) sleep has been reported to be important for efficient memory consolidation. The present results demonstrate increases in the intensity of REM sleep during the night of sleep following cognitive procedural/implicit task acquisition. These REM increases manifest as increases in total number of rapid eye movements (REMs) and REM densities, whereas the actual time spent in REM sleep did not change. Further, the participants with the higher intelligence (IQ) scores showed superior task acquisition scores as well as larger posttraining increases in number of REMs and REM density. No other sleep state changes were observed. None of the pretraining baseline measures of REM sleep were correlated with either measured IQ or task performance. Posttraining increases in REM sleep intensity implicate REM sleep mechanisms in further off-line memory processing, and provide a biological marker of learning potential. (Contains 4 tables and 2 figures.)

Little is known whether differences exist in motivation and reactive/instrumental offense behaviors between murder offenders with and without psychotic disorder. To contribute to better prevention strategies, the aim of this study was to investigate offense characteristics in murder offenders with a psychotic, nonpsychotic or no psychiatric diagnosis, and whether these factors differ according to sex. This data study examined the population of murder offenders between 1997 and 2005 (N = 435) in Victoria, Australia. Apparent motive for murder was allocated to one of six classifications. Assignations of reactive versus instrumental offense categories, co-offending, victim-offender relationship were determined by review of case material. Mental health service usage and prevalence of mental illnesses were identified through data with the statewide register of contacts with the public mental health system. Of the 435 offenders, 43 (9.9%) had been diagnosed with a psychotic illness. Gender differences between and within offenders with and without a psychotic disorder were analyzed. Murder offenders with a psychotic disorder were 3.19 (95% confidence interval [CI] = [1.27, 8.03]) times more likely to be motivated by revenge than nonpsychotic offenders and those with no diagnosis (odds ratio [OR] = 2.46, 95% CI = [1.10, 5.53]). The diagnostic groups did not differ on premeditation of their offenses or prior convictions. Perpetrators with psychotic illness were significantly more likely to kill family members and others known to them. It appears that for the psychotic disorder group, the perception of having been wronged in some way is a potential risk marker for planning and committing a serious offense. Care should be taken to improve adherence and access to care to avoid possible future serious violence especially in female patients with a high burden of mental illness like schizophrenia or severe mood disorders. [ABSTRACT FROM AUTHOR]