Rebecca L. Silton

Approach and Avoidance Profiles Distinguish Dimensions of Anxiety and Depression

Although a substantial body of research has examined the relationship between motivational systems and mood and anxiety disorders, there is disagreement among theorists regarding the nature of these relationships. Discrepancies in the literature may be explained by several factors. Studies of motivational models rarely examine both mood and anxiety disorders simultaneously, making comparisons among them difficult. Furthermore, dimensions of anxiety often are not distinguished, obscuring potential relationships. Finally, although research in this area is beginning to conceptualize individual differences in motivational systems as longstanding temperament phenomena, this notion has not been widely incorporated into motivational models. The present study examined relationships between temperamental differences in approach and avoidance motivational systems and dimensions of anxiety and depression. Results revealed distinct relationships between motivational temperaments and each psychopathology dimension. Present findings implicate individual differences in temperamental motivation as a potential factor in the development and/or maintenance of mood and anxiety disorders.

Active Summers Matter: Evaluation of a Community-Based Summertime Program Targeting Obesogenic Behaviors of Low-Income, Ethnic Minority Girls.

Low-income minority females are disproportionately affected by obesity. The relevance of summer months to weight gain is often overlooked. Some evidence suggests that summer programming, such as day camps, may offer increased opportunities for structured physical activities resulting in less weight gain. This study examined the effectiveness of Girls in the Game, a six-hour four-week sports and fitness summer camp program, in increasing physical activity (PA) and reducing body mass index and media use. Statistically significant increases were observed in four physical activity measures including total PA, MVPA, average number of ten-minute bouts of MVPA, and minutes participants spent in bouts of at least ten minutes of MVPA. This chapter highlights the importance of investigating the potential relationships among weight, physical activity, sedentary time, media use, and participation in summer camp programming.

Electrophysiological evidence of the time course of attentional bias in non-patients reporting symptoms of depression with and without co-occurring anxiety

Anxiety is characterized by attentional biases to threat, but findings are inconsistent for depression. To address this inconsistency, the present study systematically assessed the role of co-occurring anxiety in attentional bias in depression. In addition, the role of emotional valence, arousal, and gender was explored. Ninety-two non-patients completed the Penn State Worry Questionnaire (Meyer et al., 1990; Molina and Borkovec, 1994) and portions of the Mood and Anxiety Symptom Questionnaire (Watson et al., 1995a,1995b). Individuals reporting high levels of depression and low levels of anxiety (depression only), high levels of depression and anxiety (combined), or low levels of both (control) completed an emotion-word Stroop task during event-related brain potential recording. Pleasant and unpleasant words were matched on emotional arousal level. An attentional bias was not evident in the depression-only group. Women in the combined group had larger N200 amplitude for pleasant than unpleasant stimuli, and the combined group as a whole had larger right-lateralized P300 amplitude for pleasant than unpleasant stimuli, consistent with an early and later attentional bias that is specific to unpleasant valence in the combined group. Men in the control group had larger N200 amplitude for pleasant than unpleasant stimuli, consistent with an early attentional bias that is specific to pleasant valence. The present study indicates that the nature and time course of attention prompted by emotional valence and not arousal differentiates depression with and without anxiety, with some evidence of gender moderating early effects. Overall, results suggest that co-occurring anxiety is more important than previously acknowledged in demonstrating evidence of attentional biases in depression.

Neural correlates of suspiciousness and interactions with anxiety during emotional and neutral word processing

Suspiciousness is usually classified as a symptom of psychosis, but it also occurs in depression and anxiety disorders. Though how suspiciousness overlaps with depression is not obvious, suspiciousness does seem to overlap with anxious apprehension and anxious arousal (e.g., verbal iterative processes and vigilance about environmental threat). However, suspiciousness also has unique characteristics (e.g., concern about harm from others and vigilance about social threat). Given that both anxiety and suspiciousness have been associated with abnormalities in emotion processing, it is unclear whether it is the unique characteristics of suspiciousness or the overlap with anxiety that drive abnormalities in emotion processing. Event-related brain potentials were obtained during an emotion-word Stroop task. Results indicated that suspiciousness interacts with anxious apprehension to modulate initial stimulus perception processes. Suspiciousness is associated with attention to all stimuli regardless of emotion content. In contrast, anxious arousal is associated with a later response to emotion stimuli only. These results suggest that suspiciousness and anxious apprehension share overlapping processes, but suspiciousness alone is associated with a hyperactive early vigilance response. Depression did not interact with suspiciousness to predict response to emotion stimuli. These findings suggest that it may be informative to assess suspiciousness in conjunction with anxiety in order to better understand how these symptoms interact and contribute to dysfunctional emotion processing.

Differential functional connectivity of rostral anterior cingulate cortex during emotional interference

Abstract The rostral-ventral subdivision of the anterior cingulate cortex (rACC) plays a key role in the regulation of emotional processing. Although rACC has strong anatomical connections with anterior insular cortex (AIC), amygdala, prefrontal cortex and striatal brain regions, it is unclear whether the functional connectivity of rACC with these regions changes when regulating emotional processing. Furthermore, it is not known whether this connectivity changes with deficits in emotion regulation seen in different kinds of anxiety and depression. To address these questions regarding rACC functional connectivity, non-patients high in self-reported anxious apprehension (AP), anxious arousal (AR), anhedonic depression (AD) or none (CON) indicated the ink color of pleasant, neutral and unpleasant words during functional magnetic resonance imaging. While ignoring task-irrelevant unpleasant words, AD and CON showed an increase in the functional connectivity of rACC with AIC, putamen, caudate and ventral pallidum. There was a decrease in this connectivity in AP and AR, with AP showing greater reduction than AR. These findings provide support for the role of rACC in integrating interoceptive, emotional and cognitive functions via interactions with insula and striatal regions during effective emotion regulation in healthy individuals and a failure of this integration that may be specific to anxiety, particularly AP.

Mental health risk factors associated with childhood language brokering

Serving as a language translator (broker) for family members during childhood can affect cognitive and emotional functions in both beneficial and detrimental ways. Child language brokers translate in a variety of contexts including conversations between their parents and financial, legal and medical professionals. Pressure to be involved in these activities may negatively affect mental health by placing undue stress on child language brokers, while also distracting them from other responsibilities such as school. In this study, the relationship between language brokering during childhood and adolescence and the mental health of bilingual young adults was examined. Overall, language brokers had higher levels of depression. Young adults who previously served as language brokers, particularly during their preadolescent years, had higher levels of anxiety than their bilingual non-brokering counterparts. It is important for parents, educators and mental health professionals to become more aware of the mental health consequences that may arise from language brokering duties, particularly how symptoms vary depending on whether brokering began in childhood or adolescence.

Cool, callous and in control: superior inhibitory control in frequent players of video games with violent content

Abstract Research on the effects of media violence exposure has shown robust associations among violent media exposure, increased aggressive behavior, and decreased empathy. Preliminary research indicates that frequent players of violent video games may have differences in emotional and cognitive processes compared to infrequent or nonplayers, yet research examining the amount and content of game play and the relation of these factors with affective and cognitive outcomes is limited. The present study measured neural correlates of response inhibition in the context of implicit attention to emotion, and how these factors are related to empathic responding in frequent and infrequent players of video games with graphically violent content. Participants completed a self-report measure of empathy as well as an affective stop-signal task that measured implicit attention to emotion and response inhibition during electroencephalography. Frequent players had lower levels of empathy as well as a reduction in brain activity as indicated by P100 and N200/P300 event related potentials. Reduced P100 amplitude evoked by happy facial expressions was observed in frequent players compared to infrequent players, and this effect was moderated by empathy, such that low levels of empathy further reduced P100 amplitudes for happy facial expressions for frequent players compared to infrequent players. Compared to infrequent players, frequent players had reduced N200/P300 amplitude during response inhibition, indicating less neural resources were recruited to inhibit behavior. Results from the present study illustrate that chronic exposure to violent video games modulates empathy and related neural correlates associated with affect and cognition.

Time Course of Brain Network Reconfiguration Supporting Inhibitory Control

Hemodynamic research has recently clarified key nodes and links in brain networks implementing inhibitory control. Although fMRI methods are optimized for identifying the structure of brain networks, the relatively slow temporal course of fMRI limits the ability to characterize network operation. The latter is crucial for developing a mechanistic understanding of how brain networks shift dynamically to support inhibitory control. To address this critical gap, we applied spectrally resolved Granger causality (GC) and random forest machine learning tools to human EEG data in two large samples of adults (test sample n = 96, replication sample n = 237, total N = 333, both sexes) who performed a color–word Stroop task. Time–frequency analysis confirmed that recruitment of inhibitory control accompanied by slower behavioral responses was related to changes in theta and alpha/beta power. GC analyses revealed directionally asymmetric exchanges within frontal and between frontal and parietal brain areas: top-down influence of superior frontal gyrus (SFG) over both dorsal ACC (dACC) and inferior frontal gyrus (IFG), dACC control over middle frontal gyrus (MFG), and frontal–parietal exchanges (IFG, precuneus, MFG). Predictive analytics confirmed a combination of behavioral and brain-derived variables as the best set of predictors of inhibitory control demands, with SFG theta bearing higher classification importance than dACC theta and posterior beta tracking the onset of behavioral response. The present results provide mechanistic insight into the biological implementation of a psychological phenomenon: inhibitory control is implemented by dynamic routing processes during which the target response is upregulated via theta-mediated effective connectivity within key PFC nodes and via beta-mediated motor preparation. SIGNIFICANCE STATEMENT Hemodynamic neuroimaging research has recently clarified regional structures in brain networks supporting inhibitory control. However, due to inherent methodological constraints, much of this research has been unable to characterize the temporal dynamics of such networks (e.g., direction of information flow between nodes). Guided by fMRI research identifying the structure of brain networks supporting inhibitory control, results of EEG source analysis in a test sample (n = 96) and replication sample (n = 237) using effective connectivity and predictive analytics strategies advance a model of inhibitory control by characterizing the precise temporal dynamics by which this network operates and exemplify an approach by which mechanistic models can be developed for other key psychological processes.

A Daily Diary Study of Executive Functions, Coping, and Mood among Low-Income Latino Adolescents.

This study used daily diary methodology to examine the association between executive functions and daily mood, as mediated by daily coping, among low-income Latino adolescents. Fifty-eight middle school students (53% male, X ¯ = 13.31 years, 95% Latino) completed baseline measures assessing demographic characteristics and executive functions (working memory, inhibition, shifting). They subsequently completed seven consecutive daily diaries assessing daily coping (engagement, disengagement) and mood (positive, negative). Results revealed two significant mediation models: daily disengagement coping partially mediated the association between working memory and daily negative mood; daily disengagement coping partially mediated the association between inhibition and daily negative mood. Mediation models including shifting and engagement coping were not significant. Findings suggest that adolescents with poorer working memory and poorer inhibition may rely on maladaptive coping strategies, which can impact mood. Clinical implications and recommendations for future research are discussed.

The Heat Is On: A Mixed-Method Examination of Eating Behavior and Executive Functions Among Low Income Minority Girls During Summertime

Despite evidence that youth gain weight disproportionately over the summer months, few studies examine contributing obesogenic behaviors. Utilizing a mixed-methods approach, this study examined associations between summertime dietary intake patterns and executive function among 79 low-income urban minority early adolescent girls (ages 9-13 years). Participants were interviewed via the multiple-pass 24-hour dietary recall method and completed individually administered executive function tasks. A subsample of 14 parents completed interviews to gather qualitative information about summertime eating patterns. Results suggested that participants consumed 25% to 35% more daily calories than recommended, and inhibition difficulties were associated with higher calorie and sugar-sweetened soft drink intake. In addition, over one third of participants were classified as nighttime eaters, and these participants had more difficulty with inhibition, even when accounting for sleep influences, and consumed more soft drinks than daytime eaters. Qualitative interviews consistently indicated that summertime changes food consumption as well as the timing and structure of the meals.