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Chapter 2 constructs a hypothetical case study illustrating the ethical, legal, and economic priorities involved in regulatory compliance for sole proprietorships and then considers whether these priorities differ for publicly traded corporations. The case study demonstrates that compliance obligations vary with the moral saliency of the law in question but not with the organizational structure of the firm. Corporate executives working with legal counsel and corporate compliance officers face the same duties as sole proprietors. All are honor-bound to increase shareholder profit, but only through ethical means. Topics of political obligation, statutory interpretation, and corporate governance flesh out the discussion.
Parents play a key role in adolescent licensure in the United States, particularly for those with children diagnosed with CHD. Many seek strategies to facilitate discussions about driving safety, yet limited research on parental perceptions restricts resources available for these conversations.
Purpose:
This study examined parental perspectives on barriers and facilitators to safe, independent driving among adolescents with CHD and impacts of CHD on family driving experiences.
Methods:
Semi-structured interviews were conducted with 29 parents of adolescents with CHD (93% mothers), and key themes were identified using conventional content analysis.
Results:
Two themes emerged: (1) parents see driving as a pivotal step towards adolescent independence, leading to both anticipation and apprehension; (2) driving introduces challenges specific to adolescence that may not be evident earlier. Ninety-seven percent of parents reported their adolescent had no current or expected driving restrictions, consistent with reports from parents of adolescents without CHD.
Conclusions:
Parents perceived minimal CHD impact on driving, but concerns such as fatigue, cognitive effects, and attention deficit hyperactivity disorder were revealed often intensifying during adolescence and unrecognised. Provider-led discussions addressing driving readiness, CHD, and other health issues can support families during transition from adolescence to adulthood.
Verbal fluency tasks are widely used to assess language abilities and executive functions in both clinical and research settings. In post-stroke patients, prior research has indicated a significant hodological contribution to the neural basis of verbal fluency; however, this has largely been examined using lesion-based measures, predefined tractography approaches, and traditional diffusion metrics.
Methods:
Quantitative anisotropy-based structural connectometry derived from correlational tractography was employed to determine the white matter circuits underlying semantic and phonemic fluency in 44 patients with post-stroke aphasia.
Results:
Both task types were found to be linked to anterior frontal connections of left-hemisphere dorsal and ventral associative pathways, as well as domain-general projection pathways. However, visual inspection of the connectomes, supported by supplementary cross-control analyses, suggested differences in the relative emphasis and distribution of pathways, with phonemic fluency aligning more with the dorsal stream, while semantic fluency showed greater reliance on the ventral stream and a wider range of cortico-subcortical connections.
Conclusions:
The findings contribute to current understanding of the neural networks of verbal fluency in aphasia, with potential relevance for clinical practice and research.
Recent advancements in the development of novel therapies to treat phenylketonuria (PKU) have fueled a call for new assessment tools that are sensitive to PKU-related neurocognitive disruptions. The present study evaluated the NIH Toolbox, a computer-administered battery of neurobehavioral measures, for assessing cognitive function in children and adults with early-treated PKU.
Methods:
Data were examined from 91 individuals with PKU (aged 8–55 years) enrolled in an ongoing NIH-funded longitudinal study of hyperphenylalaninemia. Participants completed the NIH Toolbox as well as several validation instruments including the Wechsler Abbreviated Scale of Intelligence-Second Edition, Cambridge Neuropsychological Test Automated Battery (CANTAB), and Conners’ Continuous Performance Test.
Results:
Consistent with prior research, crystallized cognition was intact in both children and adults. In contrast, fluid cognition deficits were observed primarily in younger children while older children and adults generally performed within expectations. NIH Toolbox composite scores demonstrated strong concurrent validity with Wechsler indices and moderate correlations with other established measures.
Conclusions:
The NIH Toolbox shows promise as a valid and practical measure of neurocognitive function in PKU, supporting its potential integration into clinical trials and research protocols. Future research should prioritize longitudinal designs to assess test–retest reliability, sensitivity to change, and subgroup differences related to treatment modalities. Ongoing efforts, such as the PHEFREE consortium, will be critical for establishing the NIH Toolbox as a robust outcome measure for PKU intervention studies.
Physical neglect constitutes an experience of deprivation characterised by the absence of care, supervision, and stimulation, which may affect cognitive development during adolescence and hinder the learning of strategies to cope with demands. This study aimed to analyse coping styles and cognitive performance in adolescents in residential care with physical neglect as the predominant form of maltreatment, as well as to examine the association between both dimensions.
Methods:
This observational, cross-sectional study included 45 adolescents in residential care, aged between 12 and 16 years, with physical neglect as the predominant type of maltreatment. The instruments used were the Adolescent Coping Scale (ACS), the Stroop Color and Word Test (SCWT), the Behavioural Assessment of the Dysexecutive Syndrome for Children (BADS-C), and the Digit Span and Coding subtests of the Wechsler Intelligence Scale for Children (WISC-V).
Results:
Participants showed a predominance of the non-productive coping style, together with lower-than-expected scores for their age and educational level in selective attention, processing speed, working memory, planning, cognitive flexibility, and inhibition. Lower cognitive and executive performance was related to greater use of the non-productive coping style. In addition, linear regression analyses showed that the global cognitive performance index was significantly associated with the non-productive coping style, even after statistically controlling for sex, age, and polyvictimization.
Conclusion:
These findings suggest the importance of jointly considering coping styles and cognitive performance in adolescents in residential care with physical neglect, as well as the potential value of interventions that integrate emotion regulation, executive functions, and problem-solving.
Individuals with ADHD have difficulty providing precise estimates of time. Nevertheless, they may still be able to harness temporally predictable information to guide behavior and regulate action control. We therefore examined whether temporal cueing improves impulse control or, conversely, exacerbates impulsive tendencies, in adults with ADHD.
Methods:
Adults with ADHD and matched controls performed a temporally cued Simon task. Target onset time was either predictable or unpredictable, and lateralized responses were either compatible or incompatible with target location. Analysis of reaction time (RT) distributions allowed us to decompose impulsive behavior into two key elements: the initial urge to react impulsively and the top-down suppression of these impulses. Individual differences in attention and impulsivity were assessed using a Continuous Performance Test (CPT).
Results:
Temporal cueing increased fast impulsive errors in both groups. However, temporal cues sped responses to compatible targets in controls but to incompatible targets in adults with ADHD. Distributional analyses revealed that although temporal predictability reduced inhibitory efficiency over time in controls, it actually improved the late-stage engagement of inhibitory processes in adults with ADHD. Furthermore, in the clinical group, greater RT variability in the CPT – reflecting attentional instability – was associated with larger cueing benefits, whereas higher CPT commission errors predicted weaker benefits.
Conclusions:
By compensating for endogenous deficits in action control, temporal cues facilitated top-down suppression of impulsive responses, particularly in individuals with high attentional instability. Our findings demonstrate that temporal predictability can act as a functional scaffold for inhibitory control in ADHD.
How bilingualism impacts the brain networks that support language and cognitive control in childhood is largely unknown. Here we used diffusion-weighted and resting-state functional MRI to assess structural and functional connectivity in 36 English–Greek bilinguals and 17 English monolinguals aged 8 to 10 years. We examined language networks (arcuate and inferior fronto-occipital fasciculus microstructure; fronto-temporal functional connectivity) as well as domain-general networks involved in attention and cognitive control (superior longitudinal fasciculus microstructure; default mode network; salience network; fronto-parietal control network; striatal network functional connectivity). In the bilingual group, greater bilingual engagement was associated with enhanced default-mode and fronto-parietal functional connectivity. Earlier bilingual exposure was associated with higher superior longitudinal fasciculus microstructure. There were no associations between bilingual experience measures and language network metrics. Overall, we reveal that immersive bilingualism leaves neural signatures in the developing brain, mainly by shaping the intrinsic connectivity of domain-general networks.
This study analyses subject personal pronoun (SPP) use in Spanish among 82 typically developing children, assessing how executive functions (EFs) and linguistic abilities interact with third-person singular pronoun expression. Researchers manually coded 9750 SPP instances from sociolinguistic interviews and administered standardized tests of morphosyntax, lexicon, inhibition, working memory (WM), and attention. The investigation had two aims: (1) to replicate prior findings on SPP constraints and (2) to evaluate the contributions of linguistic and EF abilities to third-person pronoun expression. Mixed-effects binary logistic regressions confirmed three common constraints on SPP use: the first-person singular, the imperfect tense, and switch-reference contexts, replicating previous studies’ results. Although initial correlations linked EF measures to SPP expression, multiple regression analyses revealed that morphosyntactic abilities accounted for the unique variance in pronoun expression. Thus, in this sample, children’s language-internal morphosyntactic abilities are better related to third-person singular pronoun expression than our tests of inhibition, attention, and WM.
Neonatal brain injury can have impact on long-term functional outcomes. Intraventricular hemorrhage is associated with neurodevelopmental impairment (cerebral palsy, cognitive or language delay, and vision or hearing impairment) at age 2 years. Risk of significant impairment is increased by severity of hemorrhage, posthemorrhagic hydrocephalus, and white matter injury. Infants experiencing perinatal stroke most commonly face motor impairments in early childhood and beyond. Injury from hypoxia–ischemia may lead to motor delays, cognitive impairment, and behavioral challenges. Brain injury during the neonatal period can alter developmental trajectories, causing functional impairment, limitations in peer and community participation, and significant family distress. Despite this, the infant nervous system is incredibly plastic and resilient. The neonatal period is a time of active synaptogenesis and the building of larger neural networks through which to acquire motor, cognitive, and language skills. Brain injury can disrupt this process. Yet infants also display a remarkable ability to recover, adapt, and (re)gain functional abilities due to the robust developmental activity of the immature nervous system. Outcomes largely depend on injury location and extent, and environmental context. Brain injury developmental impact can be exacerbated by concomitant social adversity. Treatment delays must be identified early, and effective directed interventions initiated.
As perinatal medical care has improved, the most prevalent aftermath of preterm birth has shifted to developmental and behavioral deficits without motor disabilities. Compared to individuals born at term, individuals born preterm, particularly those born before 32 weeks’ gestational age, have poorer cognition, executive function, attention span, processing speed, language skills, and academic outcomes. They are at elevated risk for developing behavioral and emotional conditions, including attention deficit hyperactivity disorder, anxiety, autism, depression and mood disorder. Individuals born preterm have long-term differences in brain structure. Interventions for individuals are critical, beginning in early years.
Neonatal encephalopathy (NE) encompasses a range of disorders presenting with altered brain function in neonates, often leading to long-term neurodevelopmental deficits. Characterized by symptoms such as altered consciousness, poor tone, and seizures, NE occurs in 1–6 per 1,000 live term births and is a major cause of neurodevelopmental disabilities. Although many cases relate to hypoxic–ischemic injury, other causes include metabolic disorders, infections, and congenital anomalies. The introduction of therapeutic hypothermia (TH) has improved outcomes for infants with hypoxic–ischemic encephalopathy (HIE), significantly reducing the incidence of severe neurodevelopmental disabilities. However, variations in practices and results persist, and adjunct therapies such as erythropoietin have not shown effective benefits. The chapter discusses the spectrum of neurocognitive impairments following HIE, predictors of outcomes based on brain injury patterns, and highlights ongoing research to understand the long-term impact of these interventions on affected individuals.
Research has indicated that many medical and psychosocial factors contribute to cognitive deficits in sickle cell disease (SCD). Some studies of SCD in early childhood found cognitive functioning to be associated with socioeconomic status but not disease severity. The current study examined how the home environment is associated with cognitive functioning and school readiness in children with SCD.
Methods:
Young children (n = 29; Mage = 4.4 years SD = 0.3) with SCD underwent an evaluation of cognitive and academic skills. Subsequently, researchers and caregivers completed the Home Observation for Measurement of the Environment (HOME), an in-home measure of cognitive stimulation. Linear regression was used to examine the relationship between each of the HOME subscales and cognitive and academic measures while controlling for genotype.
Results:
The total score from the HOME inventory was associated with overall IQ, working memory, and school readiness. Among the subscales of the HOME inventory, Learning Materials, Modeling, and Variety were associated with cognitive and academic outcomes.
Conclusions:
Stimulation in a child’s home may affect cognitive and academic development in young children with SCD. Future research should examine the benefits of increasing learning materials and the variety of activities in the homes of young SCD patients.
Cognitive dysfunction is a core feature of major depressive disorder (MDD). Although both repetitive transcranial magnetic stimulation (rTMS) and vortioxetine have demonstrated procognitive effects, direct comparative evidence remains limited. This study compared the clinical and cognitive outcomes of rTMS and vortioxetine in patients with MDD.
Methods:
In this 8-week naturalistic study, 40 patients with MDD received either rTMS (n = 25) or vortioxetine (n = 15). Depressive symptoms were assessed using the Montgomery–Åsberg Depression Rating Scale (MADRS). Cognitive performance was evaluated with the Perceived Deficits Questionnaire–Depression (PDQ-D), Trail Making Test Part B (TMT-B), Stroop Test, and Wisconsin Card Sorting Test (WCST). Longitudinal changes were analyzed using linear mixed-effects models. Week-8 outcomes were examined using ANCOVA adjusted for baseline cognitive performance and relevant clinical covariates.
Results:
Both groups showed significant improvements in depressive symptoms and cognitive performance over time, with no significant treatment × time interactions. Baseline cognitive performance strongly predicted week-8 outcomes. Domain-specific differences were observed in executive functioning: vortioxetine showed a modest advantage in WCST performance, whereas rTMS showed a non-significant trend toward better Stroop interference performance. No significant differences were detected in processing speed.
Conclusion:
rTMS and vortioxetine were associated with comparable improvements in depressive symptoms and cognitive functioning in patients with MDD. Baseline cognitive status appeared to be a stronger predictor of outcome than treatment modality.
To compare associations between neurocognitive testing and two different self-report paradigms: (1) recall-based (PROMIS Cognitive Function) and (2) real-time, task-specific (NASA-Task Load Index [NASA-TLX]) among 56 patients with breast cancer.
Methods:
This is a secondary analysis from a phase II, single-arm trial of memantine to prevent cognitive decline among patients receiving chemotherapy for breast cancer (NCT04033419). Before chemotherapy and 4 weeks after their final cycle, participants completed neuropsychological assessment and self-report measures. Memantine was administered between assessments. At pre-chemotherapy, multivariable linear regression evaluated associations between a unit-weighted, composite neurocognitive test score with PROMIS Cognitive Function and NASA-TLX, controlling for age, cancer stage, and cognitive reserve. Explanatory analyses examined associations within individual neurocognitive subtests. Multivariable regression explored the extent to which pre-treatment self-reported cognition predicted post-treatment performance.
Results:
Pre-chemotherapy, higher NASA-TLX scores (greater perceived workload) were robustly associated with worse performance (β = −0.31 [−0.50, −0.12], p = .002). Relationships were strongest for executive function: Animal Fluency (IQR = 35): −3.3 (−5.8, −0.8), p = .011; COWA (IQR = 36) = −6.7 (−12.8, −0.7), p = .031; One Touch Stockings (IQR = 31): −0.70 (−1.0, −0.3), p < .001. Pre-treatment NASA-TLX was also associated with post-treatment performance in univariable but not multivariable models. PROMIS Cognitive Function and neurocognitive performance were not associated.
Conclusions:
The NASA-TLX and neurocognitive performance were strongly associated, particularly in the executive function domain. Future work involving the NASA-TLX in cancer populations, including its use in everyday contexts, will help clarify whether it may enhance CRCI characterization.
Impairments in spatial working memory (SWM) have been observed in several disparate psychiatric conditions. The present study investigated how SWM varied across a range of psychiatric disorders in a large sample of young adults using the SWM test from the Cambridge Neuropsychological Test Automated Battery.
Methods
A sample of 575 participants aged 18–29 years was enrolled from the general community and evaluated for psychiatric disorders using several screening evaluations. Performance on the SWM test was assessed, with outcome measures of strategy and total errors. Using Z-scores and Cohen’s d effect sizes, SWM was compared between each psychiatric disorder and healthy controls.
Results
The majority of psychiatric diagnoses examined demonstrated SWM deficits in both strategy and total errors. Large effect sizes in strategy were observed for bulimia, post-traumatic stress disorder, major depressive disorder, social phobia, and agoraphobia. Large effect sizes in total errors were observed for agoraphobia, major depressive disorder, social phobia, intermittent explosive disorder, obsessive-compulsive disorder, bulimia, post-traumatic stress disorder, and gambling disorder.
Conclusions
Our findings suggest that SWM impairment is a transdiagnostic element of psychiatric illness rather than serving as a specific feature of any one diagnosis. Future directions include the exploration of how SWM deficits may be utilized in prognostic and therapeutic interventions.
It has been widely suggested in recent years that exposure to and use of multiple languages can affect cognitive performance, with bilinguals frequently being argued to demonstrate superior cognitive performance to their monolingual peers. The current study investigates whether there are any effects of minimal exposure to second-language (L2) Welsh on the cognitive skills of English-speaking emergent bilingual primary school children in Wales. Participants were divided into two language groups based on their school year, with performance between monolingual (N = 25) and emergent bilingual (N = 38) children compared on a variety of executive function (EF) tasks. Results revealed superior performance for the bilingual children in Reception and Year 1 on all EF tasks aside from the Forward digit recall compared to monolingual peers, with no differences between groups in Year 2. This suggests that the cognitive benefits of bilingualism emerge at very early stages of second-language exposure.
This chapter explores human cognition as a set of interconnected processes – perception, memory, attention, learning, reasoning, and executive function that allow us to adapt flexibly to complex environments. It contrasts human cognition with artificial intelligence, showing how neural networks and transformers borrow inspiration from the brain but lack intuition, context sensitivity, and self-awareness. Through examples from neuroscience and AI, the chapter highlights how both systems process information, learn, and make decisions. It argues that the future lies not in replacing human cognition but in building augmented cognition – partnerships where AI amplifies human thought and creativity rather than substituting for it.
Preterm-born children are at increased risk for executive function (EF) deficits, particularly in inhibitory control. While bilingualism has been linked to enhanced EF in term-born children, its effects on preterm populations are less understood. This study explored whether bilingualism supports inhibitory control in preterm-born children using behavioral and functional near-infrared spectroscopy (fNIRS) data during a Go/No-Go task. Sixteen preterm-born children (ages 6–7), both bilingual and monolingual, were assessed. Bilingual participants demonstrated faster reaction times (RTs) without compromising accuracy and showed lower levels of oxygenated hemoglobin (HbO) in the frontal lobe, indicating more efficient neural effort. Results underscore a distinct neural and behavioral profile in bilingual preterm children during inhibitory control tasks, emphasizing the role of language experience in shaping EF outcomes. These findings suggest that bilingualism may offer cognitive benefits for inhibitory control in preterm-born children and highlight the potential for bilingualism to support EF development in at-risk groups.
Maternal mental health strongly influences child development and depression risk. This study investigated how positive and negative dimensions of prenatal maternal mental health differentially shape childhood depressive symptoms through cognitive mediators.
Methods
Participants were drawn from the Growing Up in Singapore Towards Healthy Outcomes (GUSTO) cohort. Of the 1198 mother–child dyads enrolled, 523 (52.6% boys) had sufficient data for the mediation analysis. Maternal mental health at 26 weeks’ gestation was assessed using a bifactor model derived from the Beck Depression Inventory-II, State–Trait Anxiety Inventory, and Edinburgh Postnatal Depression Scale. Child language ability was measured at age 2 years with the Bayley Scales of Infant Development, executive function at age 7 years with the Behaviour Rating Inventory of Executive Function, and depressive symptoms at age 9 years with the Children’s Depression Inventory-2. Serial mediation models tested hypothesized pathways.
Results
Distinct mediation pathways emerged. Positive maternal mental health was associated with enhanced early language ability, which in turn was associated with fewer depressive symptoms in later childhood (β = −0.017, 95% CI: −0.042, −0.003). Conversely, negative maternal mental health was associated with poorer executive functioning, which in turn was associated with more depressive symptoms (β = 0.040, 95% CI: 0.016–0.077).
Conclusions
Positive and negative maternal mental health are linked to childhood depressive symptoms through distinct neurocognitive pathways. By identifying language and executive function as specific developmental mediators, our findings point to targeted and developmentally sensitive intervention opportunities to disrupt intergenerational pathways of depression.
Metabolic dysfunction-associated steatotic liver disease (MASLD) (formerly known as nonalcoholic fatty liver disease) is the most prevalent liver disease globally. Emerging evidence suggests MASLD-related metabolic and inflammatory processes may disrupt frontostriatal–limbic circuits, contributing to alterations in cognitive and reward-related brain function. This systematic review aimed to examine whether MASLD is associated with changes in cognitive functioning and reward-related processes, and whether these changes correspond to structural and functional brain alterations. A systematic search of PubMed, Web of Science, and Google Scholar was conducted from inception to November 11, 2025, using terms related to MASLD, cognition, and reward. Eligible studies included adult MASLD populations and observational designs assessing cognitive and/or reward outcomes. Studies involving neuropsychiatric or neurological disorders or medications known to affect cognition were excluded. Fourteen studies (eight cross-sectional, four cohort or case–control, and two Mendelian randomization) found MASLD significantly associated with poorer attention, executive function and memory, often proportional to disease severity. Neuroimaging studies reported significant reductions in cortical thickness, hippocampal and white matter volume, increased white matter hyperintensities, and cerebrovascular dysfunction (p < 0.05), most pronounced in executive and visuospatial regions. Limited evidence suggested alterations in small-to-moderate circuits, including nucleus accumbens dysfunction and reduced hippocampal–orbitofrontal connectivity. MASLD is associated with cognitive impairment, reward-related neural systems, and structural and cerebrovascular brain alterations. These findings reinforce its characterization as a multisystem condition affecting brain health and neuropsychiatric risk. Longitudinal studies with standardized criteria and confounder adjustment are needed to clarify causal mechanisms.