Components of executive control with advantages for bilingual children in two cultures

The present study used a behavioral version of an anti-saccade task, called the ‘faces task’, developed by [Bialystok, E., Craik, F. I. M., & Ryan, J. (2006). Executive control in a modified anti-saccade task: Effects of aging and bilingualism. Journal of Experimental Psychology: Learning, Memory, and Cognition, 32, 1341-1354] to isolate the components of executive functioning responsible for previously reported differences between monolingual and bilingual children and to determine the generality of these differences by comparing bilinguals in two cultures. Three components of executive control were investigated: response suppression, inhibitory control, and cognitive flexibility. Ninety children, 8-years old, belonged to one of three groups: monolinguals in Canada, bilinguals in Canada, and bilinguals in India. The bilingual children in both settings were faster than monolinguals in conditions based on inhibitory control and cognitive flexibility but there was no significant difference between groups in response suppression or on a control condition that did not involve executive control. The children in the two bilingual groups performed equivalently to each other and differently from the monolinguals on all measures in which there were group differences, consistent with the interpretation that bilingualism is responsible for the enhanced executive control. These results contribute to understanding the mechanism responsible for the reported bilingual advantages by identifying the processes that are modified by bilingualism and establishing the generality of these findings across bilingual experiences. They also contribute to theoretical conceptions of the components of executive control and their development.     

Sequential learning models for the Wisconsin card sort task: Assessing processes in substance dependent individuals

The Wisconsin card sort task (WCST) is a commonly used neuropsychological test of executive or frontal lobe functioning. Traditional behavioral measures from the task (e.g., perseverative errors) distinguish healthy controls from clinical populations, but such measures can be difficult to interpret. In an attempt to supplement traditional measures, we developed and tested a family of sequential learning models that allowed for estimation of processes at the individual subject level in the WCST. Testing the model with substance dependent individuals and healthy controls, the model parameters significantly predicted group membership, even when controlling for traditional behavioral measures from the task. Substance dependence was associated with (a) slower attention shifting following punished trials and (b) reduced decision consistency. Results suggest that model parameters may offer both incremental content validity and incremental predictive validity.     

Neuropsychology: Implications for the Treatment of Alcoholism

The author describes cognitive deficits that are attributable to alcoholism and discusses the prospect for recovery of these impaired skills. Rather than viewing neuropsychological testing simply as a diagnostic exercise, the author considers the potential treatment role of this psychological subspecialty and its implication for alcoholism counselors.     

The effect of repetitive saccade execution on the attention network test: Enhancing executive function with a flick of the eyes

The simple act of repeatedly looking left and right can enhance subsequent cognition, including divergent thinking, detection of matching letters from visual arrays, and memory retrieval. One hypothesis is that saccade execution enhances subsequent cognition by altering attentional control. To test this hypothesis, we compared performance following repetitive bilateral saccades or central fixation on the revised attention network test, which measures the operation of three distinct attentional networks: alerting, orienting, and executive function. The primary finding was that saccade execution increased the subsequent operation of the executive function network, which encompasses attentional control. Specifically, saccade execution decreased response time to target stimuli in the presence of response-incongruent flankers. A secondary finding was that saccade execution decreased response time to targets when an invalid location was cued prior to target onset. These findings suggest that saccades are an effective means of improving attentional control. Of greater theoretical importance, the study establishes attentional enhancement as a potential mechanism by which saccades enhance other aspects of cognition. Although some saccade execution effects have been found to depend on consistency of handedness (i.e., the consistency with which an individual uses one hand over the other), saccade-induced enhancement of attentional control occurred independently of handedness consistency.     

Deconstructing executive deficits among persons with autism: implications for cognitive neuroscience

Individuals with autism demonstrate impairments on measures of executive function (EF) relative to typically developing comparison participants. EF is comprised of several processes including inhibition, working memory and set shifting that develop throughout the lifespan. Impairments in EF may appear early in development and persist, or may represent a more transient delay which resolves with time. Given the unevenness of the cognitive profile of persons with autism, understanding the development of EF poses methodological challenges. These issues include those related to matching measures and the choice of comparison participants to which the performance of persons with autism will be compared. In the current review, we attempt to break down the processes of inhibition, working memory and set shifting among persons with autism. We propose to do this within a developmental perspective that highlights how matching measures and comparison participants can affect the interpretation of research findings.     

The interruptive effect of pain on attention

Pain is known to disrupt attentional performance in both healthy adults and patients with chronic pain. Exactly which aspects of attentional function are affected are, however, still to be determined. The primary aim of this investigation was to systematically examine the effects of experimentally induced pain on a range of attentional performance tasks. Following a review of tests of attentional disruption, seven best candidate tasks were selected and examined across seven experiments. The tasks were: continuous performance, flanker, endogenous precueing, n-back, inhibition, attentional switching, and divided attention. Healthy adult participants performed each of these tasks under three different conditions: a painful heat sensation, a warm heat sensation, and a nonheat control. Pain differentially affected attentional performance across these tasks; pain-related attentional impairment was found on the n-back, attentional switching, and divided attention tasks, but not on the other tasks. This finding suggests that the aspects of attention most affected by pain are those essential for the completion of complex tasks that require the processing of multiple cues and control over attentional deployment. These results are discussed in the context of an emerging view of pain as a demand for executive control and the development of measures that could be used to examine attentional disruption in the context of pain.     

Treatment of co-occurring child maltreatment and substance abuse

Despite high prevalence and severe negative consequences of child maltreatment (e.g., Brown, G. R., & Anderson, B., (1991). Psychiatric morbidity in adult inpatients with childhood histories of sexual and physical abuse. American Journal of Psychiatry, 148, 55–61; Jaudes, P. K., Ekwo, E., & Van Voorhis, J.V., (1995). Association of drug abuse and child abuse. Child Abuse and Neglect, 19, 1065–1075; Murphy, J. M., Jellinek, M., Quinn, D., Smith, G., & Goshkom, M., (1991). Substance abuse and serious child mistreatment: Prevalence, risk, and outcome in a court sample. Child Abuse and Neglect, 15, 197—211), the treatment of perpetrators and victims of child abuse and neglect remains grossly understudied (Behl, L. E., Conyngham, H. A., & May, P. F., (2003). Trends in child maltreatment literature. Child Abuse and Neglect, 27, 215–229). More than half of parentes founded for the abuse and neglect of their children have evidenced drug abuse, yet no treatments have been validated that concurrently address these problems. The reciprocal interaction between substance abuse and child maltreatment supports the need to concurrently treat these problems. This article illustrates the relationship between child maltreatment and parental substance abuse and proposes a behavioral model to explain the reciprocal influence of drug abuse and child maltreatment. A behavioral treatment plan that is designed to concurrently address drug abuse and child abuse is proposed and suggestions are made for future directions in this area.     

Substance use/abuse as a predictor to illegal and violent behavior: A review of the relevant literature

The preponderance of the research evidence supports the conclusion that abuse of certain types of illicit drugs, separately from the abuse of alcohol, predisposes to subsequent violent behavior. The relationship of cocaine/crack to violent crime has been established more clearly for users of crack in inner city areas than it has for those who are users of other forms of cocaine in the general population.In regard to any race/ethnic or socioeconomic factors in the relationships between substance use/abuse and violent behavior, most clearly established is that a higher proportion of young Black males, compared to other race/ethnic groups, are actively involved in dealing cocaine/crack in some inner city poverty areas.As for gender differences, the research evidence indicates that alcohol abuse as a predictor to and a precipitant of violent behavior, is more clearly established for males than for females. Drug abuse, as distinct from alcohol abuse, has been found to predict subsequent violent behavior, for females as well as for males. “Co-morbidity,” the combination of substance use with and psychopathology, appears more likely to predict for females to later violent behavior. Psychopathology and mental health problems are less likely to predict occurrence of either violent or criminal behavior in the future than are either alcohol abuse or drug abuse.     

Substance use/abuse as a predictor to illegal and violent behavior: A review of the relevant literature

The preponderance of the research evidence supports the conclusion that abuse of certain types of illicit drugs, separately from the abuse of alcohol, predisposes to subsequent violent behavior. The relationship of cocaine/crack to violent crime has been established more clearly for users of crack in inner city areas than it has for those who are users of other forms of cocaine in the general population.In regard to any race/ethnic or socioeconomic factors in the relationships between substance use/abuse and violent behavior, most clearly established is that a higher proportion of young Black males, compared to other race/ethnic groups, are actively involved in dealing cocaine/crack in some inner city poverty areas.As for gender differences, the research evidence indicates that alcohol abuse as a predictor to and a precipitant of violent behavior, is more clearly established for males than for females. Drug abuse, as distinct from alcohol abuse, has been found to predict subsequent violent behavior, for females as well as for males. “Co-morbidity,” the combination of substance use with and psychopathology, appears more likely to predict for females to later violent behavior. Psychopathology and mental health problems are less likely to predict occurrence of either violent or criminal behavior in the future than are either alcohol abuse or drug abuse.     

Planning in young children: A review and synthesis

Research on the development of planning is reviewed in the context of a framework that considers the role of three types of cognitive flexibility in planning development: event-independent temporal representation, executive function, and self-projection. It is argued that the emergence of planning abilities in the preschool period is dependent upon the development of event-independent temporal representation. Research on the development of executive function suggests that its sub-components, in particular inhibitory control, may be linked to developmental improvements on planning tasks. Recently, new paradigms have established that self-projection to the future appears to develop over the preschool period. We consider how these different forms of cognitive flexibility may themselves be related in development.     

Substance Abuse Treatment Outcomes: Treatment Practice and Policy Implications

Treatment professionals, whether clinicians, scientists, or policy makers, are interested in developing methods to improve behavioral health treatment outcomes. Clinicians are interested in knowing what treatment practices to incorporate into the services they offer clients. Policymakers request guidance regarding which decisions are most likely to lead to effective treatment approaches and structures. Scientists are eager to contribute knowledge pertinent to building and evaluating effective treatment practices and policies. The papers in this special series provide information on substance abuse treatment practices andpresent findings relevant to clinical practice, policy decisions, and scientific inquiry. This paper provides a brief overview of the National Treatment Improvement Evaluation Study (NTIES) and briefly summarizes the other research papers included in this issue, all of which exemplify practice and policy issues in the substance abuse treatment field and bolster approaches applied to address these issues.     

Parent rating of executive function in fetal alcohol spectrum disorder: A review of the literature and new data on Aboriginal Canadian children

Aboriginal children in Canada are at high risk of fetal alcohol spectrum disorder (FASD) but there is little research on the cognitive impact of prenatal alcohol exposure (PAE) in this population. This paper reviews the literature on parent report of executive functioning in children with FASD that used the Behavior Rating Inventory of Executive Function (BRIEF). New data on the BRIEF is then reported in a sample of 52 Aboriginal Canadian children with FASD for whom a primary caregiver completed the BRIEF. The children also completed a battery of neuropsychological tests. The results reveal mean scores in the impaired range for all three BRIEF index scores and seven of the eight scales, with the greatest difficulties found on the Working Memory, Inhibit and Shift scales. The majority of the children were reported as impaired on the index scores and scales, with Working Memory being most commonly impaired scale. On the performance-based tests, Trails B and Letter Fluency are most often reported as impaired, though the prevalence of impairment is greater for parent ratings than test performance. No gender difference is noted for the parent report, but the boys had slightly slower intellectual functioning and were more perseverative than the girls on testing. The presence of psychiatric comorbidity is unrelated to either BRIEF or test scores. These findings are generally consistent with prior studies indicating that parents observe considerable executive dysfunction in children with FASD, and that children with FASD may have more difficulty with executive functions in everyday life than is detected by laboratory-based tests alone.     

Representational and executive selection resources in 'theory of mind': evidence from compromised belief-desire reasoning in old age

Effective belief-desire reasoning requires both specialized representational capacities-the capacity to represent the mental states as such-as well as executive selection processes for accurate performance on tasks requiring the prediction and explanation of the actions of social agents. Compromised belief-desire reasoning in a given population may reflect failures in either or both of these systems. We report evidence supporting this two-process model from belief-desire reasoning tasks conducted with younger and older adult populations. When task inferential complexity is held constant, neither group showed specific difficulty with reasoning about mental state content as compared with non-mental state content. However, manipulations that systematically increase executive performance demands within belief-desire reasoning caused systematic decreases in task performance in both older and younger adult groups. Moreover, the effect of increasing executive demands was disproportionately greater in the older group. Regression analysis indicated that measures of processing speed and inhibition contributed most to explaining variance in accuracy and response times in the belief-desire reasoning tasks. These results are consistent with the idea that compromised belief-desire reasoning in old age is likely the result of age-related decline in executive selection skills that supplement core mental state representational abilities, rather than as a result of failures in the representational system itself.     

Cognitive processing of moral and social judgements: A comparison of offenders,students, and control participants

Examining cognitive processes related to offenders’ moral and social judgements is important in order to better understand their criminal behaviour. In the present study, 30 offenders, 30 students, and 24 control participants were administered the moral-conventional judgements computer task, which requires responding under strict time constraints. Participants read scenarios and were asked to judge whether the act was acceptable or unacceptable when rules were either assumed or removed. Additionally, participants completed an executive function (EF) task in order to examine the relation between EF and moral and social judgements. The findings revealed that, as expected, controls and students had faster reaction times (RTs) and a higher percentage of normative judgements than offenders. Additionally, offenders had a low percentage of normative judgements, particularly in the conventional rule removed condition. Finally, RTs of moral and conventional judgements in most conditions were related to EF among students but not controls or offenders. We conclude that offenders, as compared to controls and students, may rely more on rule-oriented responding and may rely less on EF when making moral and social judgements.     

Child and Adolescent Tobacco and Substance Use within the Context of ADHD: Implications for Prevention and Treatment

Tobacco, alcohol, marijuana, and other forms of substance use among children and adolescents is a significant public health concern. At present, one high-risk population of great concern is those affected with Attention-Deficit/Hyperactivity Disorder (ADHD) and those with subthreshold ADHD-like symptoms. The prevalence of tobacco and substance use is considerable within this population, and ADHD and ADHD-like symptoms often present as comorbid conditions. To further the understanding of this problem, a review is provided of youth tobacco and substance use and their biobehavioral influences in the context of ADHD. Using primary care as an example, opportunities for tobacco and substance use prevention and treatment within this high-risk population are examined.     

The role of goal representation in preschoolers' flexibility and inhibition

This study addressed the role of goal representation in preschoolers’ inhibition and flexibility performance. A total of 56 4- and 5-year-olds were tested in an adapted version of the Shape School task where the difficulty of goal representation was manipulated by varying the degree of transparency of task cues. The findings showed that both age groups’ performance in the flexibility phase was increased when demands on goal representation were alleviated by using transparent cues instead of arbitrary cues. Furthermore, 4-year-olds performed more accurately on go trials in the inhibition phase with transparent cues than with arbitrary cues. These results confirm the critical role of goal representation in flexibility and reveal its influence in inhibition contexts. Altogether, this study suggests that goal representation is a key element for efficient executive function across a variety of settings involving different executive functions.     

The relative unnaturalness of atheism: On why Geertz and Markússon are both right and wrong

Commonly scholars in the cognitive science of religion (CSR) have advanced the naturalness of religion thesis. That is, ordinary cognitive resources operating in ordinary human environments typically lead to some kind of belief in supernatural agency and perhaps other religious ideas. Special cultural scaffolding is unnecessary. Supernaturalism falls near a natural anchor point. In contrast, widespread conscious rejection of the supernatural as in atheism appears to require either special cultural conditions that upset ordinary function, cognitive effort, or a good degree of cultural scaffolding to move people away from their maturationally natural anchor-points. Geertz and Markússon (2009) identify ways to strengthen cognitive approaches to the study of religion and culture, including atheism, but fail to demonstrate that atheism is as natural in a comparable respect as theism.     

A cognitive model of suicidal behavior: Theory and treatment

With some prominent exceptions, much of the research designed to elucidate the nature, prevalence, and correlates of suicidal behavior has been conducted from an atheoretical perspective. Conversely, psychological theories to explain suicidal behavior are largely untested by rigorous experimental designs. We propose a cognitive model of suicidal behavior that is grounded in the empirical literature on cognitive and behavioral correlates of and risk factors for suicidal behavior. In addition, we demonstrate the manner in which the theoretical components are targeted in cognitive therapy for suicidal patients. We highlight aspects of the model with less empirical support, and we propose ways those constructs can be tested in future research.     

The development of analogy making in children: Cognitive load and executive functions

The aim of the current study was to investigate the performance of 6-, 8-, and 14-year-olds on an analogy-making task involving analogies in which there are competing perceptual and relational matches. We hypothesized that the selection of the common relational structure requires the inhibition of other salient features, in particular, perceptual matches. Using an A:B::C:D paradigm, we showed that children’s performance in analogy-making tasks depends crucially on the nature of the distractors. Children chose more perceptual distractors having a common feature with C compared with A or B (Experiment 1). In addition, they were also influenced by unstructured random textures. When measuring reaction times instead of accurate responses, only the 8-year-olds’ reaction times were significantly influenced by perceptual distractors. The 6-year-olds seemed to select the first match they noticed, and the 14-year-olds were not influenced (or much less influenced) by featural distractors. These results are compatible with an analogy-making account based on varying limitations in executive functioning at different ages.