Impulsive and Omission Errors: Potential Temporal Processing Endophenotypes in ADHD

Temporal processing (TP) is associated with functions such as perception, verbal skills, temporal perspective, and future planning, and is intercorrelated with working memory, attention, and inhibitory control, which are highly impaired in individuals with attention deficit hyperactivity disorder (ADHD). Here we evaluate TP measures as potential endophenotypes in Caribbean families ascertained from probands affected by ADHD. A total of 232 individuals were recruited and clinically evaluated using an extensive battery of neuropsychological tasks and reaction time (RT)-based task paradigms. Further, the heritability (genetic variance underpinning phenotype) was estimated as a measure of the genetics apportionment. A predictive framework for ADHD diagnosis was derived using these tasks. We found that individuals with ADHD differed from controls in neuropsychological tasks assessing mental control, visual-verbal memory, verbal fluency, verbal, and semantic fluency. In addition, TP measures such as RT, errors, and variability were also affected in individuals with ADHD. Moreover, we determined that only omission and commission errors had significant heritability. In conclusion, we have disentangled omission and commission errors as possible TP endophenotypes in ADHD, which can be suitable to assess the neurobiological and genetic basis of ADHD. A predictive model using these endophenotypes led to remarkable sensitivity, specificity, precision and classification rate for ADHD diagnosis, and may be a useful tool for patients’ diagnosis, follow-up, and longitudinal assessment in the clinical setting.

Beyond the Household: Caribbean Families and Biocultural Models of Alloparenting

Alloparental or extramaternal care is an integral aspect of human childrearing. This behavior has been explored both as an extension of the primary mother–infant dyad that evolved to meet the demands of altricial offspring and as an economic exchange of energy and resources. Much of this research centers on foraging or small-scale communities and positions the household as the central unit through which to explore negotiations of care. In this review, I use evidence from Black Caribbean communities living in industrialized countries to challenge the broad applicability of the analytical model of the bounded household and to question whether our current articulations of theory and empirical assessments of extramaternal care are well suited to investigations of these behaviors in the vast majority of contemporary human populations. Alloparental practices in the Caribbean reflect dynamic responses to maternal migration and the local influence of global labor markets. The children who remain at home experience variability in the care received from their surrogate parents. The dynamic aspect of the care practices enacted by these transnational families reveals the behavioral flexibility that has been integral to human survival.

FINANCIAL LITERACY, RETIREMENT, AND BECOMING FINANCIALLY CAPABLE IN A DEVELOPING COUNTRY

Worldwide, 3.5 billion (67%) of older adults do not understand basic financial concepts. In the Caribbean, families and professionals alike are struggling to assist and financially support a rapidly ageing population. The concept of children as “pension guarantee” is widely practised throughout the Caribbean, but factors such as modernization, urbanization, migration, and a shift in societal norms pertaining to familial responsibilities, have left many older persons financially fending for themselves. Less than half of all Jamaicans have adequate retirement funds. People with limited financial resources can and do save, but often use strategies that are not advantageous. The stark reality of low pension coverage among older Jamaicans and austere working conditions among public and some private sector workers indicate growing economic, financial, and societal challenges. Jamaica’s rapidly growing ageing population has resulted in both a workforce and a retirement financial crisis. This symposium provides an overview of the current policy and economic issues. We describe the design, implementation, and evaluation of an economic program to increase financial literacy and planning of adults nearing retirement age. To increase financial retirement literacy of Jamaicans with limited educational and financial resources, a peer-to-peer program was developed using a culturally adapted version of the FDIC Money Smart Program. A peer-to-peer approach has the potential to strengthen financial literacy and enhance retirement planning behaviours of underserved adults and avoid further burdening an already limited workforce. This project’s findings can inform policy, shape program development, and guide implementation of similar programs in low resource countries.

Fathers’ Cognitive Engagement and Preschoolers’ Literacy Skills in Three Ethnic Groups in Trinidad and Tobago

Using the UNICEF Multiple Indicator Cluster Surveys, this study assessed the associations between fathers’ cognitive engagement and preschoolers’ literacy skills in African Caribbean, Indo-Caribbean, and mixed-ethnic Caribbean families in Trinidad and Tobago. The sample consisted of 476 fathers and their preschool-aged children. Multigroup structural equation modeling indicated that paternal cognitive engagement was associated with children’s literacy skills in mixed-ethnic Caribbean and Indo-Caribbean families above and beyond maternal cognitive engagement activities. Across all groups, children’s age, number of hours in preschool, and number of children’s books in the home were associated with children’s literacy skills. Fathers’ residential status was associated with children’s literacy skills differently across ethnic groups. Findings are interpreted in terms of the importance and consistency of paternal engagement in the home environment for the acquisition of early language skills in developing countries.

ADHD Endophenotypes in Caribbean Families

Objective: The aim of this study is to contrast the genetics of neuropsychological tasks in individuals from nuclear families clustering ADHD in a Caribbean community. Method: We recruited and clinically characterized 408 individuals using an extensive battery of neuropsychological tasks. The genetic variance underpinning these tasks was estimated by heritability. A predictive framework for ADHD diagnosis was derived using these tasks. Results: We found that individuals with ADHD differed from controls in tasks of mental control, visuospatial ability, visuoverbal memory, phonological and verbal fluency, verbal and semantic fluency, cognitive flexibility, and cognitive ability. Among them, tasks of mental control, visuoverbal memory, phonological fluency, semantic verbal fluency, and intelligence had a significant heritability. A predictive model of ADHD diagnosis using these endophenotypes yields remarkable classification rate, sensitivity, specificity, and precision values (above 80%). Conclusion: We have dissected new cognitive endophenotypes in ADHD that can be suitable to assess the neurobiological and genetic basis of ADHD.