Vânia Lima Pereira, Sandra Freitas, Mário R. Simões, Bianca Gerardo
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引用次数: 0
Abstract
Background
There are numerous scales for screening cognitive performance and thus identification of any potential deficits, but in spite of the vulnerability of the prison population to such problems, there has been no adequate validation of screening tools specifically for use with prisoners or others in the criminal justice system.
Aim
To validate the Montreal Cognitive Assessment (MoCA) for use with prisoners.
Methods
100 adult prisoners in one Portuguese prison were randomly invited by clinicians to take part in this study. A same size sample of community-living adult non-offenders of similar age was selected from the MoCA's normative study database in Portugal. For both groups, the key inclusion criterion was fluency in the Portuguese language. All participants completed the Mini Mental State Examination (MMSE) and the MoCA, both in Portuguese translation. Cronbach's alpha coefficient was calculated as an index of internal consistency and Pearson's r correlations calculated. Group performances were compared using independent samples t-test. Covariance analysis (ANCOVA) was computed with level of education as covariate. To measure the magnitude of the effect, was used. A receiver operating characteristics curve analysis was computed to evaluate the discriminatory accuracy of MoCA and MMSE.
Results
The MoCA showed a ‘reasonable’ internal consistency index (α = 0.75) as well as positive and significant correlations with the MMSE. As a cognitive measure, however, the MoCA showed consistently superior psychometric properties and higher discriminatory accuracy (MoCA = 89%) than the MMSE (65%). According to the Youden index, the optimal cut-off point for the MoCA is below 24 points, whereas for the MMSE, it is below 27.
Conclusions
The MoCA is a valid cognitive screening tool for use with prisoners. Further validations against detailed cognitive evaluation would be a useful next step.
期刊介绍:
Criminal Behaviour & Mental Health – CBMH – aims to publish original material on any aspect of the relationship between mental state and criminal behaviour. Thus, we are interested in mental mechanisms associated with offending, regardless of whether the individual concerned has a mental disorder or not. We are interested in factors that influence such relationships, and particularly welcome studies about pathways into and out of crime. These will include studies of normal and abnormal development, of mental disorder and how that may lead to offending for a subgroup of sufferers, together with information about factors which mediate such a relationship.