The PIQ greater than VIQ discrepancy in violent and nonviolent delinquents

Interactions with youth justice and associated costs for young people with speech, language and communication needs

BACKGROUND

Individuals with speech, language and communication needs (SLCN) are at greater risk of contact with the criminal justice system. Diagnosis and appropriate treatment of SLCN reduces these risks, leading to better life outcomes for the individual as well as broader social and economic benefits. These youth represent a particularly high-priority group for research into language deficits, as the juvenile justice system involves situations with a high risk or serious consequences that rely upon the application of effective language skills. Whilst some studies have established some gains in speech and communication from speech pathology (SP) interventions during custody, there is limited evidence on the long-term impact of these gains following release from custody. Similarly, few studies have directly measured the cost savings associated with early SP on subsequent youth antisocial behaviour and crime.

AIMS

To estimate the youth antisocial behaviours, youth justice (YJ) contacts and associated costs (from a justice perspective) of childhood SLCN.

METHODS & PROCEDURES

Using 12 years of data from a longitudinal study of Australian children and young people, we employ a panel fixed-effects model to explore the relationship between SLCN and youth antisocial behaviour and youth offending between 12 and 17 years of age. Using these results, we estimate the cost of SLCN and subsequent cost savings associated with identification of SLCN.

OUTCOMES & RESULTS

The results showed that the annual cost of SLCN to the YJ system (exchange rate as at 9 December 2020) is A$875 (95% confidence interval (CI) = A$195, A$1916) (US$$649, €536, £485) per person who participates in youth crime, which is due to higher rates of youth antisocial behaviour and youth offending. Identification of SLCN (defined by SP treatment) appears to have a positive impact on youth antisocial behaviour and crime, mediated through improved language and communication. On average, young people with a history of 'identified' SLCN incur A$188 (95% CI = A$42, A$412) lower YJ costs (US$$140, €105, £115), compared with the same individual, before identification. Over the lifetime of the individual, this equates to A$9.2 million (95% CI = A$2.05 million, A$20.2 million) (US$$6.8 million, €5.6 million, £5.1 million) cost savings to the YJ system (A$3389 per person with SLCN) (2020 Australian dollars) (US$2513, €2074, £1880).

CONCLUSIONS & IMPLICATIONS

Overall, the findings revealed that young people with SLCN have an elevated risk of youth antisocial behaviour and crime. However, the identification of SLCN (and subsequent treatment) leads to changes in the offending risk trajectory for these individuals, resulting in lower rates of youth antisocial behaviour and consequently lower rates of crime and its associated justice costs.

WHAT THIS PAPER ADDS

What is already known on the subject It is well documented in the literature that young people in contact with the justice system have much higher rates of previously undiagnosed SLCN than those of the general population. There is less known about whether the identification of SLCN (and subsequent treatment) leads to changes in the offending risk trajectory for these individuals, leading to lower rates of youth antisocial behaviours and crime. What this paper adds to existing knowledge This study uses a longitudinal survey of 5000 children and young people to track the antisocial behaviour and crime-risk trajectory of children and young people with SLCN. The study finds evidence that young people with 'identified' SLCN report less juvenile antisocial behaviour and lower YJ contacts after intervention. The potential lifetime cost savings associated with intervention is A$9.2 million (95% CI = A$2.05 million, A$20.1 million) (US$$6.8 million, €5.6 million, £5.1 million). What are the potential or actual clinical implications of this work? The findings of this study can quantify the effects (in terms of cost savings to the justice system) of the early identification and subsequent intervention for young people with SLCN.

Can IQ predict parent-reported behavioral and emotional problems in children with neurological deficiencies?

OBJECTIVE

The aim of the current study was to investigate whether total intelligence scores (FSIQ) and/or a discrepancy in intelligence can predict behavioral or emotional problems in children with neurological deficiencies.

METHOD

The population consists of children with neurological deficiencies (N = 610, ranging from 6 to 17 years), referred due to concerns on the (educational) development of the child to a tertiary outpatient clinic. All children were tested with the Dutch Wechsler Intelligence Scale for Children - third edition (WISC-III-NL). A VIQ-PIQ discrepancy score was calculated by subtracting the performance capacities of the verbal capacities. The effects of demographic variables, FSIQ, and the VIQ-PIQ discrepancy on two parent-rated questionnaires measuring behavior and emotions in children were analyzed with linear and logistic regression models.

RESULTS AND CONCLUSION

The VIQ-PIQ discrepancy was not predictive of behavioral or emotional problems recorded on the above-mentioned parent-rated questionnaires. The FSIQ score, age, and sex were predictive to some extent: increases in age and FSIQ led to a decrease of reported problems, and boys showed more problems than girls. Children with neurological deficiencies had on average significantly higher verbal capacities than performance capacities, in line with the neuropsychological principle that language survives brain damage whereas performance capacities are more affected.

PIQ > VIQ Discrepancy as a Correlate of Social Problem Solving and Aggression in Delinquent Adolescent Males

Numerous studies have established an association between a PIQ > VIQ discrepancy and juvenile delinquency. However, the reasons for this connection are unclear. In this study, we investigated the PIQ > VIQ discrepancy in a sample of 95 male adolescent delinquents and found that it was related not only to delinquency but also to social problem solving. We found that the PIQ > VIQ discrepancy was related to greater hostile attributional bias on a social problem-solving task. However, we did not find a link between the PIQ > VIQ discrepancy and measures of aggression.

Intelligence Score Profiles of Female Juvenile Offenders

Previous studies have found that male juvenile offenders typically obtain low scores on measures of intelligence, often with a pattern of higher scores on measures of nonverbal relative to verbal tasks. The research on the intelligence performance of female juvenile offenders is limited. This study explored the Wechsler Intelligence Scale for Children–Fourth Edition (WISC-IV) scores of 430 female juvenile offenders. Their mean IQ scores were significantly lower than the standardization sample means. Cluster analysis, which allows for identification of subgroups based on IQ score patterns, revealed five distinct subgroups of girls within the sample based on their WISC-IV Index scores. Although there was a cluster that was similar to the Verbal IQ (VIQ) < Performance IQ (PIQ) pattern described in previous studies, the other clusters serve as a reminder of the diversity of cognitive functioning among juvenile offenders.

The relation of violence exposure and ethnicity to intelligence and verbal-performance discrepancies in incarcerated male adolescents

Incarcerated populations have an estimated incidence of intellectual disabilities (IDs) far higher than national norms, ranging as high as 10%. In the present study, the relation between ID and violence exposure in 115 incarcerated adolescents was examined. Interpersonal violence exposure (IPV-E) predicted an average decrease in full scale IQ of 4.5 points, explaining approximately 5% of the difference in IQ. Child maltreatment increased the odds of having a verbal disability by three folds and explained 17% of the variance in verbal disability. Hierarchical regression was used to examine the relative contribution of ethnicity, poverty, and violence exposure to intellectual functioning. The literature on racial bias in incarceration and the implications for the present study are discussed.

Validity of the Massachusetts Youth Screening Instrument-2 (MAYSI-2) scales in juvenile justice settings

High prevalence rates of psychological problems among juvenile offenders underscore the need for effective mental health screening tools in the juvenile justice system. In this study, we evaluated the validity of the Massachusetts Youth Screening Instrument-2 (MAYSI-2) developed by Grisso and Barnum (2001) to identify mental health needs of adolescents in various juvenile justice settings. The sample was 1,192 adolescents (1,082 boys and 110 girls) admitted into Virginia juvenile correction facilities between the dates of July 2004 and June 2006. Analyses revealed higher MAYSI-2 scale scores for girls than for boys and MAYSI-2 scale intercorrelations were similar to those reported in the MAYSI-2 manuals (Grisso & Barnum, 2003, 2006). We also evaluated the concurrent validity of MAYSI-2 scales by examining scale score correlations with related and unrelated extratest variables. Results showed strong convergent validity for several MAYSI-2 scales.

Verbal ability and delinquency: testing the moderating role of psychopathic traits

BACKGROUND

Impaired verbal abilities are one of the most consistent risk factors for serious antisocial and delinquent behavior. However, individuals with psychopathic traits often show serious antisocial behavior, despite showing no impairment in their verbal abilities. Thus, the aim of the current study was to examine whether psychopathy moderates the relationship between verbal abilities and delinquent behavior in a sample of detained youth.

METHODS

The sample included 100 detained adolescent boys who were assessed on self-reported delinquent acts and psychopathic traits, as well as their age at first offense based on official records. Participants also completed a competitive computer task involving two levels of provocation, during which skin conductance was measured. A standard measure of receptive vocabulary was individually administered.

RESULTS

As predicted, there was a significant interaction between callous-unemotional (CU) traits (a critical dimension of psychopathy) and verbal ability when predicting violent delinquency. Individuals who were high on CU traits with higher scores on the measure of verbal abilities reported the greatest violent delinquency. These individuals also showed the lowest level of skin conductance reactivity during the provocation task.

CONCLUSIONS

The results suggest CU traits are an important moderator of the relation between verbal abilities and violent delinquency.

Interpretation of VIQ-PIQ and intersubtest differences on the Spanish version of the WAIS

Although the Spanish version of the Wechsler Adult Intelligence Scale (WAIS; Escala de Inteligencia Wechsler para Adultos [EIWA]) is the most frequently used intellectual assessment for Spanish speaking clients in the United States, there is little information available on score differences necessary to establish reliable and abnormal differences between Performance IQ (PIQ) and Verbal IQ (VIQ), and between the various subtests of the EIWA. The present study, based on EIWA standardization data (N = 616 Puerto Ricans), reports reliability data and base rates to assist in evaluating the clinical significance of PIQ-VIQ differences. The results demonstrated substantial similarity between the EIWA and the English versions of the Wechsler tests. The interpretation of these differences is discussed, and tables are presented of statistically and clinically significant differences.