Psychopathy in Italian female murderers

Over the years, the number of homicides in Italy has progressively decreased, ultimately becoming one of the lowest rates in Europe (357 = 0.7 per 100,000 inhabitants in 2017, according to ISTAT 1 ISTAT: Italian Institute of Statistics.
). The number of homicides committed by women was about 9% of the total number of homicides during our study period. The percentage has increased in recent years because the total number of homicides has decreased without a proportionate decrease in the number of female homicides. Indeed, murder is an unusual type of crime for a woman and is often associated with a mental disorder, so when a woman committed a homicide, a psychiatric assessment was often performed. A forensic psychiatry expert was assigned to investigate the offender's psychopathology and mental state at the time of the offense. The root causes of the crime remained unexplained, however, due to the lack of a psychiatric precedent to justify this kind of assessment. The role of psychopathy in homicide has seldom been studied in female offenders, even though psychopathy has an important role in violent crimes. The investigators examined, clinically and historically, a sample of women who committed murder with different levels of criminal responsibility (female homicide offenders found not guilty by reason of insanity, having partial criminal responsibility, and convicted as criminally responsible and sentenced to prison) to identify the prevalence of the psychopathic dimension and its possible role in this sample. Prevalence and degree of psychopathic traits were examined in these female offenders using the Psychopathy Checklist‐Revised. This study showed that females who had committed homicide were likely to suffer from mental illness; most of the homicidal acts were committed impulsively; and most female homicides occurred within the family, especially among women who were psychotic, but less so if they were psychopathic. Psychopathy tended to co‐occur more with personality disorders than with psychotic psychopathology. Psychopathy was more evident among female homicide offenders who had been abused or traumatized. Psychopathic women who killed had high factor F1 scores and low antisocial component of factor F2.     

A Century of Suicide in Italy: A Comparison between the Old and the Young

This study analyzes suicide rates from 1887 to 1993 in the Italian population between the ages of 15 and 24 years old and over 65 years of age, based on official data published in the Health Statistics Year Book. The rates of death by suicide (per 100,000) subjects) are calculated for each year and for 10-year periods, as are the mortality rates relative to each method of suicide, standardized by gender. The latter analysis was possible starting from 1951 only, when it became customary to record method. The findings indicate an increase in the suicide phenomenon in the elderly population in Italy over the test period. Rates are at least 3 times higher for men than for women. The highest rates are reported for elderly men, but there appears to have been a greater proportional increase in the number of suicides committed by elderly women. The rise was statistically significant in both males and females. By contrast, a rather constant decrease in suicide rates in young people emerges from the beginning of the century through to the present date. This decrease is more marked in females, although suicide rates are lower for females than for males. Over the study period, substantial changes have come about in the suicide methods used by both young and old people. There was an increase in poisoning by care exhaust fumes, jumping from heights, hanging, and firearms.     

Number sense at 12 months predicts 4-year-olds’ maths skills

Preverbal infants spontaneously represent the number of objects in collections. Is this ‘sense of number’ (also referred to as Approximate Number System, ANS) part of the cognitive foundations of mathematical skills? Multiple studies reported a correlation between the ANS and mathematical achievement in children. However, some have suggested that such correlation might be mediated by general-purpose inhibitory skills. We addressed the question using a longitudinal approach: we tested the ANS of 60 12 months old infants and, when they were 4 years old (final N = 40), their symbolic math achievement as well as general intelligence and inhibitory skills. Results showed that the ANS at 12 months is a specific predictor of later maths skills independent from general intelligence or inhibitory skills. The correlation between ANS and maths persists when both abilities are measured at four years. These results confirm that the ANS has an early, specific and longstanding relation with mathematical abilities in childhood.

Research Highlights

• In the literature there is a lively debate about the correlation between the ANS and maths skills.
• We longitudinally tested a sample of 60 preverbal infants at 12 months and rested them at 4 years (final sample of 40 infants).
• The ANS tested at 12 months predicted later symbolic mathematical skills at 4 years, even when controlling for inhibition, general intelligence and perceptual skills.
• The ANS tested at 4 years remained linked with symbolic maths skills, confirming this early and longstanding relation in childhood.