The purpose of the present study is to examine the relationship among psychological flexibility, mindfulness, and goal-directed behaviors controlled by executive function, as measured by the Avoidance and Fusion Questionnaire for Youth (AFQ-Y), the Child and Adolescent Mindfulness Measure (CAMM), and the Comprehensive Executive Function Inventory (CEFI). Participants completed the AFQ-Y, CAMM, and CEFI as part of a Midwestern alternative school’s curriculum. Data was collected for 30 participants (male = 28, female = 2) with approval from the school. The results indicate a significant relationship between the AFQ-Y and CAMM (r = -0.7711, p < 0.0001), CAMM and CEFI (r = -0.3226; p = 0.0821), AFQ-Y and the emotion regulation subscale (r = -0.5018; p = 0.0047), as well as the working memory subscale of the CEFI (r = -0.3622; p = 0.0492), and the CAMM and the emotion regulation subscale (r = 0.494; p = 0.0055), organization subscale (r = 0.3723; p = 0.0427), and working memory subscale (r = 0.4725; p = 0.0084). The results are beneficial for clinicians who specialize in providing treatment to children and adolescents with development disabilities and various other disorders. Limitations and future research are also discussed within the current study.

Stress is associated with a range of unhealthy eating habits. However, no previous studies have used experimental design to take an intergenerational perspective in the examination of how stress may influence parental feeding behavior, nor have they examined potential protective factors. The current study tests the effects of stress on maternal feeding behaviors and explores the potential protective role of maternal executive functioning (EF). We manipulated maternal stress with the Trier Social Stress Task (TSST) in a community sample mothers (N = 61, Mage = 33.45 years). We measured maternal EF with a series of computerized tasks. Maternal feeding behavior was observationally coded using standardized procedures. Results indicate a main effect of stress on controlling feeding styles. Furthermore, this effect of stress on controlling feeding behaviors is ameliorated among mothers with higher levels of EF. Results suggest potential factors to be considered in the treatment and prevention of diet-related illnesses.

abstract: Dual language use is thought to afford certain cognitive advantages to bilingual children and may function as an additional resource to help low-income Mexican-American children achieve academically. Emotion regulation and executive functioning (e.g., inhibition) have been found to be particularly important in studies investigating pathways to early academic achievement. Understanding how we can capitalize on children’s bilingual abilities to strengthen their executive functioning and emotion regulation, or to offset problems in these domains, may be important to promote better educational outcomes and inform policy. Thus, the current study investigated the relation between emerging bilingualism, inhibition, emotion regulation, and academic achievement across early childhood in sample of 322 low-income, Mexican-American children. Data were collected in a laboratory space at child ages 36-, 54-, and 72-months. Bilingualism was indexed as the interaction of Spanish and English vocabulary, and a mediated moderation model was examined. Results provided further evidence that inhibition positively predicts academic achievement during early childhood. Greater Spanish language vocabulary indirectly predicted academic achievement while controlling for English language vocabulary, suggesting that children from immigrant families may benefit from maintaining their Spanish language abilities as they begin to immerse themselves in an English-speaking classroom. Advancing our understanding of the development of self-regulatory abilities within bilingual, immigrant populations could have significant implications for educational policy. / Dissertation/Thesis / Masters Thesis Psychology 2018

Inflammatory models of neurodegeneration suggest that higher circulating levels of inflammation can lead to cognitive decline. Despite established independent associations between greater body mass, increased inflammation, and cognitive decline, no prior research has explored whether markers of systemic inflammation might mediate the association between body mass and changes in cognitive functioning. To test such a model, we used two longitudinal subsamples (ns = 9066; 12,561) of aging adults from the English Longitudinal Study of Ageing (ELSA) study, which included two cognitive measures components of memory and executive functioning, as well as measurements of body mass and systemic inflammation, assessed via C-reactive protein (CRP). Greater body mass was indirectly associated with declines in memory and executive functioning over 6 years via relatively higher levels of CRP. Our results suggest that systemic inflammation is one biologically plausible mechanism through which differences in body mass might influence changes in cognitive functioning among aging adults.

Huntington's disease (HD) is a genetic, neurodegenerative disorder that is characterized by motor, cognitive and psychiatric disturbances. Anosognosia, or lack of awareness of symptoms, is commonly observed in neurodegenerative disorders, including HD. Most theories suggest that emotion, executive functioning, and memory play important roles in self-awareness. There is limited research of anosognosia in HD and no theoretical model of how it manifests in the disease. The purpose of this study was to examine Metacognitive Knowledge, or overall beliefs about the self, and Online Awareness, or the ability to predict (Anticipatory Awareness) and evaluate (Emergent Awareness) task performance, in HD. Fifty-six symptomatic HD patients and fifty informants completed the study. Results revealed that those with the best executive functioning and lowest apathy were also better able to report on their symptoms. Those with the best executive functioning and memory and lowest apathy were the best at predicting and evaluating their performance on cognitive tasks. Patient self-report of memory was associated with cognitive performance while self-report of executive functioning and apathy was not. Only informant report of apathy and executive functioning was related to cognitive performance. For both Metacognitive Knowledge and Online Awareness, HD patients tended to have a better awareness of memory than executive functioning. These results suggest that awareness in HD is governed by local monitoring systems rather than a single metacognitive mechanism. It is also consistent with literature that suggests that individuals are least able to evaluate performance on tasks for which they are poorest in skill level, as HD patients tend to have impaired executive functioning and increased apathy with relative sparing of memory.

Television shows, especially cartoons, are one of the most common types of media in children’s lives. Although there is a well-established connection between television exposure and difficulties with attention, it is unclear if all types of television are equally impactful. Given the amount of time children are exposed to television, there is a need to better understand which components of shows may or may not impact one’s attentional and executive functioning abilities. One such factor is the pace of the content. The current study expands on this limited area of the literature by utilizing a 9-minute 30-second long cartoon video, which has been edited at both a fast and slow pace, to examine the influence of pace on measures of attention and executive functioning (the Stop Signal Task and the Attentional Network Test) in both Typically Developing children (N = 24) and children with Attention-Deficit/Hyperactivity Disorder (ADHD; N = 17). Two (group; children with ADHD vs. Typically Developing children) x two (pace; fast vs. slow) ANCOVAs were conducted separately with each outcome measure as the dependent variable, group (ADHD and Typically Developing) and pace (fast and slow) as the independent variables, and IQ and Internalizing Problems as covariates. Findings suggested that although the majority of results were non-significant, effect sizes for group and pace (and associated covariates) varied across outcome measures. The Alerting and Executive Control ANT Networks also had non-significant but small effect sizes for the group by pace interactions. Planned comparisons of estimated marginal means revealed a non-significant and small effect of pace for children with ADHD, but no effect for Typically Developing children, for both interactions. Implications for those who work with and care for children are reviewed, and study limitations and future research directions are discussed.

Brain injuries are one of the leading causes of disability and death globally, and prevalence numbers indicate an increase of injuries each year. Brain injuries significantly burden the individual afflicted; the effects of brain injuries are felt across families and relationships, and society at large. Brain injuries are often complicated by co-morbid socially significant health disorders, from mental health to financial and challenging behavior (i.e., aggression). The presence of these can severely limit access to community and rehabilitative opportunities. Some common characteristics underlying these socially significant problems are executive dysfunction and impulsivity. The literature broadly points to the role of executive functioning in impulsivity, indicating that when these processes are inadequate, impulsivity is more severe. To complicate, impulsivity research within brain injury is not broad. Additionally, little consensus exists on the concept and how stable this behavior is, and whether impulsivity can be improved. An area of impulsivity research, delay discounting, has gained increased attention from behavior scientists in the past 30 years because of its pragmatic approach to impulsivity. Delay discounting is a trans-disease process and various clinical populations discount delayed rewards at a high rate. The few studies that exist indicate that brain-injured people also discount at a higher rate compared to controls. Furthermore, high delay discounting have well-established connections with other socially significant health disorders. Due to the lack of breadth of the discounting literature in brain injury research, one exciting area is temporal stability and clinical interventions to decrease discounting. In a set of two studies, the aim was to expand the current knowledge on temporal stability, connections to socially significant behavior and deficits, and the effects on clinical interventions to reduce discounting. Study 1 examined the relationship between responses on discounting tasks at two different times and the relationship between discounting and measures of challenging behavior and executive functions. This study indicates that discounting was stable, that challenging behavior is related to higher rates of discounting yet did not find a relationship with executive functioning. Study 2 investigated the effects of computerized cognitive training and mindfulness training on discounting, executive functioning, and challenging behavior in multiple baseline research design across three participants. Results indicated that a small and transient improvement in delay discounting was observed for two of three participants during the computerized cognitive training. The improvement increased once the mindfulness training was introduced for the same two participants. Improvements were observed on executive functioning measures for all participants, and limited improvements were observed from measures of challenging behavior. Together these findings add to the body of literature on delay discounting and brain injury by demonstrating temporal stability and to the literature on clinical interventions to reduce high rates of delay discounting

Parkinson’s disease (PD) is a common neurodegenerative disorder associated with dysfunction of the basal ganglia, which contributes to a range of motor, cognitive, and affective symptoms. Striatal dopaminergic deficits are one of the core pathological mechanisms thought to contribute to the extra-motor (i.e., cognitive and affective) symptoms in early PD. The present study investigated the relationship between striatal dopaminergic integrity and cognition in 21 patients with PD and 21 age and education matched controls. Each individual underwent dopamine transporter (DaT) imaging with single photon emission computed tomography (SPECT) (i.e., DaTscan) and standardized neuropsychological testing. Strong positive associations were found between DaT availability in the striatum and verbal memory (r = .52-.61) and problem solving/set-shifting (r = .55) in patients with PD. Additional moderate to strong positive associations (r = .49-.56) between DaT concentrations and visuospatial functions in patients with PD were found. However, similar significant associations between DaT and cognition were observed in age and education matched controls. Clinically, it is important for health care professionals to consider the role of both striatal and extra-striatal mechanisms as they relate to cognition in PD. Future studies examining the full range of pathological mechanisms that contribute to cognitive dysfunction in PD over time are warranted in order to inform more effective and targeted interventions.

Bilingual language control refers to how bilinguals are able to speak exclusively in one language without the unintended language intruding. Two prominent verbal theories of bilingual language control have been proposed by researchers: the inhibitory control model (ICM) and the lexical selection mechanism model (LSM). The ICM posits that domain-general inhibition is employed in order to suppress the unintended language’s activation. The LSM posits that inhibition is not used; rather a lexical selection mechanism targets only the intended language’s words. In order to better test the theories’ hypotheses, I developed computational models to estimate participants’ reaction times when naming in blocks of semantically related pictures and in blocks of semantically unrelated pictures. For these tasks, the ICM model predicts that semantic interference will be abolished when bilinguals switch languages, while the LSM model does not. In Experiment One, English-Spanish bilinguals named pictures that were either semantically related to the previous four trials, or semantically unrelated to the previous four trials. Research indicated that language switching did not abolish priming effects, supporting the ICM. These results contradict conclusions found in previous literature. To reconcile this, another experiment was conducted. It was similar to Experiment One, except filler trials separated semantically related trials. Results showed that each time a semantically related neighbor was presented, naming latency increased by ~10ms regardless of language switching or number of filler items. It suggests that the existing literature mistook incremental learning effects as priming effects, and it demonstrates a need to incorporate theories of incremental learning into theories of bilingual language control.

Executive functioning usually refers to one’s ability to regulate one’s behavior, set goals, be mentally flexible, and understand the consequence of one’s actions. However, certain neurodevelopmental disabilities such as Autism, often can negatively impact executive function processes. Although applied behavior analytic (ABA) treatment is the most recommended intervention for autism treatment practitioners rarely assess or target executive functioning within their treatment planning. The present study assessed the relationship between direct and indirect executive functioning scores and a language assessment used by ABA providers. Thirty-nine children with autism spectrum disorder were administered a variety of scales including the Behavior Rating Inventory of Executive Functioning (BRIEF 2), Comprehensive Executive Functioning Inventory (CEFI), Tower of London (TOL), and the PEAK Comprehensive Assessment (PCA). Obtained data yielded a moderate, negative relationship between the total BRIEF and total PCA scores (r=-0.521, p=.032) and a moderate, positive relationship between CEFI planning and PCA scores (r=0.394, p=.017). However, there was a strong correlation between total PCA scores and TOL scores (r=0.708, p=.005).