Arrested development? Reconsidering dual-systems models of brain function in adolescence and disorders

The dual-systems model of a ventral affective system, whose reactivity confers risks and liabilities, and a prefrontal control system, whose regulatory capacities buffer against these vulnerabilities, is an intuitive account that pervades many fields in the cognitive neurosciences--especially in the study of populations that differ from neurotypical adults, such as adolescents or individuals with affective or impulse regulation disorders. However, recent evidence that is inconsistent with dual-systems models illustrates the complexity of developmental and clinical variations in brain function. Building new models to account for this complexity is critical to progress in these fields, and will be facilitated by research that emphasizes network-based approaches and maps relationships between structure and function, as well as brain and behavior, over time.     

Adolescent athletes’ learning about coping and the roles of parents and coaches

Objectives

The purpose of this study was to develop a grounded theory of the ways adolescent athletes learned about coping in sport. We subsequently came to focus on the roles of parents and coaches within this process.

Method

Interviews were conducted with 17 athletes (8 females, 9 males, M_age = 15.6 years), 10 parents (6 mothers, 4 fathers), and 7 male coaches. Grounded theory methodology (Corbin & Strauss, 2008) was used.

Results

Learning about coping was an experiential process consisting of the athletes’ sport experiences and learning through trial and error, reflective practice, and coping outcomes (consistent performance, independence in coping, and persistence in coping). Learning was facilitated by athletes being exposed to multiple situations and reflecting on their coping efforts. Parents and coaches helped athletes learn about coping by creating a supportive context for learning (listening and monitoring their own reactions, establishing trust and respect, reading the athlete, and fostering independence). Parents and coaches also used specific strategies to help athletes learn about coping, including questioning and reminding, providing perspective, sharing experiences, dosing stress experiences, initiating informal conversations, creating learning opportunities, and direct instruction.

Conclusions

Adolescent athletes must gain personal experience in dealing with stressors in order to learn how to cope. Parents and coaches represent key sources of influence within the process of learning about coping.     

Anxiety attenuates awareness of emotional faces during rapid serial visual presentation

Anxiety limits normative perception and impacts the interaction between key neurophysiological systems, possibly by decreasing recruitment of goal-oriented processes and increasing recruitment of stimulus-driven processes. Previous studies examining the impact of anxiety on emotion processing commonly lack a sample with levels of anxiety comparable to a clinical population. Many also fail to control for co-occurring symptoms like depression. The current study used rapid serial visual presentation (RSVP) with two emotional targets, comparing healthy controls to a group of individuals with symptom levels comparable to anxiety disorder patients. The results showed a modulatory effect of anxiety; the high anxiety (HA) group showed an enhanced impairment in detecting the second of two emotional targets relative to the low anxiety (LA) control group. Though there were no group-specific effects on the attentional blink or repetition blindness, there was a significant interaction of group with first and second target valence. Notably, HA individuals showed deficits (where LA individuals showed benefits) when the same emotion was presented twice. Further, when the first target was neutral, second target detection was especially impaired in HA individuals. Correlational analyses confirmed perceptual limitations were related to anxiety, but not depression, positive affect, or negative affect. The current results, along with past findings, suggest that clinical anxiety leads to deficits in overall cognitive control, increased difficulty inhibiting attention to distractors, and impairments in rapid, intuitive emotion processing.     

Perceptual simulations can be as expressive as first-order logic

Theories asserting that human reasoning is based on perceptual simulations often suppose these simulations are of concrete individual objects and the specific relations that hold among them. However, much human knowledge involves assertions about which relations do not hold, generalities over large numbers of objects and conditional facts. Can simulation theories explain how the mind represents these forms of knowledge, or are they inferior in their expressive power to knowledge representation schemes based on logical formalisms designed specifically to deal with negative, conditional and quantificational knowledge? In this paper, we show how assertions about mental simulations can in fact straightforwardly express all the concepts that comprise first-order logic, including negation, conditionals and both universal and existential quantification. We also speculate on how to extend this approach to deal with probabilistic and more expressive logics.     

Catching a glimpse of working memory: top-down capture as a tool for measuring the content of the mind

This article outlines a methodology for probing working memory (WM) content in high-level cognitive tasks (e.g., decision making, problem solving, and memory retrieval) by capitalizing on attentional and oculomotor biases evidenced in top-down capture paradigms. This method would be of great use, as it could measure the information resident in WM at any point in a task and, hence, track information use over time as tasks dynamically evolve. Above and beyond providing a measure of information occupancy in WM, such a method would benefit from sensitivity to the specific activation levels of individual items in WM. This article additionally forwards a novel fusion of standard free recall and visual search paradigms in an effort to assess the sensitivity of eye movements in top-down capture, on which this new measurement technique relies, to item-specific memory activation (ISMA). The results demonstrate eye movement sensitivity to ISMA in some, but not all, cases.     

Spatial working memory for locations specified by vision and audition: Testing the amodality hypothesis

Spatial working memory can maintain representations from vision, hearing, and touch, representations referred to here as spatial images. The present experiment addressed whether spatial images from vision and hearing that are simultaneously present within working memory retain modality-specific tags or are amodal. Observers were presented with short sequences of targets varying in angular direction, with the targets in a given sequence being all auditory, all visual, or a sequential mixture of the two. On two thirds of the trials, one of the locations was repeated, and observers had to respond as quickly as possible when detecting this repetition. Ancillary detection and localization tasks confirmed that the visual and auditory targets were perceptually comparable. Response latencies in the working memory task showed small but reliable costs in performance on trials involving a sequential mixture of auditory and visual targets, as compared with trials of pure vision or pure audition. These deficits were statistically reliable only for trials on which the modalities of the matching location switched from the penultimate to the final target in the sequence, indicating a switching cost. The switching cost for the pair in immediate succession means that the spatial images representing the target locations retain features of the visual or auditory representations from which they were derived. However, there was no reliable evidence of a performance cost for mixed modalities in the matching pair when the second of the two did not immediately follow the first, suggesting that more enduring spatial images in working memory may be amodal.     

"I'm attached, and I'm a good guy/gal!": how character attachment influences pro- and anti-social motivations to play massively multiplayer online role-playing games

One's feelings of intimacy and connectedness with distal, fictional media characters are referred to as parasocial interactions. Video games have challenged this concept, as the distance between game players and characters is greatly reduced, if not completely removed, in virtual environments. Games encourage the internalization and psychological merging of a player's and a character's mind, a multidimensional concept known as character attachment (CA). Data from our study suggest that dimensions of CA are useful in understanding both pro- and anti-social gaming motivations. Pro-social gamers feel a greater sense of control over their characters, while anti-social gamers are more likely to suspend their disbelief of the game environment and not take responsibility for their virtual actions. Pro-social gaming was more prevalent in older gamers, and younger male game characters were motivated by anti-social reasons.     

Female meadow voles,Microtus pennsylvanicus,respond differently to the scent marks of multiple male conspecifics

Many nonhuman animals are capable of discriminating a group or entity containing more objects from one containing less of the same objects. The capacity for making judgments of numerousness may also allow individuals to discriminate between potential mates. Female meadow voles (Microtus pennsylvanicus) may use judgments of relative numerousness to distinguish between potential suitors by selecting males that signal their interest by depositing more scent marks relative to other males. We used a familiarization–discrimination paradigm in the absence of training to test the hypothesis that female voles will discriminate between the different numerosities of scent marks of two male conspecifics that are similar in features of their phenotype and quality. During the exposure phase, we presented female voles with different ratios of feces scent marks from two males. During the test phase, we presented females with a single, fresh fecal scent mark from each of the two male donors, whose marks they had previously encountered during the exposure phase. In both phases, females spent more time investigating the scent mark(s) of the male that deposited more scent marks than that of the male that deposited fewer scent marks provided the difference in the ratio of scent marks provided by the male donors in the exposure phase was ≥2. Our results are consistent with studies on a variety of taxa, suggesting that numerosity discriminations are evolutionarily ancient and spontaneously available to nonhuman animals and humans.     

Perfectionism in Pediatric Anxiety and Depressive Disorders

Although perfectionism has been identified as a factor in many psychiatric disorders across the life span, it is relatively understudied in pediatric anxiety and depressive disorders. Furthermore, there exists little cohesion among previous research, restricting the conclusions that can be made across studies. In this review, research associating perfectionism with pediatric anxiety and depression is examined and a framework is presented synthesizing research to date. We focus on detailing the current understanding of how perfectionism develops and interacts with other developmental features characteristic of anxiety and depression in children and potential pathways that result in anxiety and depressive disorders. This includes: how perfectionism is measured in children, comparisons with relevant adult literature, the development of perfectionism in children and adolescents, mediators and moderators of the link between perfectionism and anxiety and depression, and the role of perfectionism in treatment and prevention of these disorders. We also present research detailing perfectionism across cultures. Findings from these studies are beginning to implicate perfectionism as an underlying process that may contribute broadly to the development of anxiety and depression in a pediatric population. Throughout the review, difficulties, limitations, and gaps in the current understanding are presented while offering suggestions for future research.