Stressful life events and predictors of post-traumatic growth among high-risk early emerging adults

Stressful life events (SLEs) may elicit positive psychosocial change among youth, referred to as post-traumatic growth (PTG). We assessed types of SLEs experienced, degree to which participants reported PTG, and variables predicting PTG across 24 months among a sample of high-risk, ethnically diverse, early emerging adults. Participants were recruited from alternative high schools (n = 564; mean age = 16.8; 65% Hispanic). Multi-level regression models were constructed to examine the impact of environmental (SLE quantity, severity) and personal factors (hedonic ability, perceived stress, developmental stage, future time orientation) on a composite score of PTG. The majority of participants reported that positive changes resulted from their most life-altering SLE of the past two years. Predictors of PTG included fewer SLEs, less general stress, having a future time perspective, and greater identification with the developmental stage of emerging adulthood. Findings suggest intervention targets to foster positive adaptation among early emerging adults who experience frequent SLEs.     

Habituation contributes to within-session changes in free wheel running.

Three experiments tested the hypothesis that habituation contributes to the regulation of wheel running. Rats ran in a wheel for 30-min sessions. Experiment 1 demonstrated spontaneous recovery. Rats ran more and the within-session decreases in running were smaller after 2 days of wheel deprivation than after 1 day. Experiment 2 demonstrated dishabituation. Running rate increased immediately after the termination of a brief extra event (application of the brake or flashing of the houselight). Experiment 3 demonstrated stimulus specificity. Rats completed the second half of the session in either the same wheel as the first half, or a different wheel. Second-half running was faster in the latter case. Within-session patterns of running were well described by equations that describe data from the habituation, motivation, and operant literatures. These results suggest that habituation contributes to the regulation of running. In fact, habituation provides a better explanation for the termination of wheel running than fatigue, the variable to which this termination is usually attributed. Overall, the present findings are consistent with the proposition that habituation and sensitization contribute to the regulation of several forms of motivated behavior.     

Effects of post-session wheel running on within-session changes in operant responding

This study tested the effects of post-session wheel running on within-session changes in operant responding. Lever-pressing by six rats was reinforced by a food pellet under a continuous reinforcement (CRF) schedule in 30-min sessions. Two different flavored food pellets were used as reinforcers. In the wheel conditions, 30-min operant-sessions with one of the flavored pellets were followed by 30-min free-wheel running sessions. Meanwhile, in the home conditions, rats’ operant responding was reinforced by the other flavored pellets during 30-min operant-sessions, and the rats were then returned to their homecages. All rats were exposed to 4 wheel and 4 homecage sessions. Operant responding was lowered during the wheel conditions. However, post-session running did not alter the within-session pattern of operant responding. These effects were practically identical to the effects of drug-induced taste-aversion learning on within-session changes in operant responding, suggesting similar mechanisms in both taste-aversion preparations.     

Effects of attention and external stimuli on duration estimation under aprospective paradigm

The study examined whether there are two independent cognitive factors affecting duration estimation. In two experiments, we manipulated simultaneously and independently two variables, namely, the level of attention to the lapse of time and the quantity of perceived changes, and examined their effects on duration estimation under a prospective paradigm. The duration was estimated to be longer when subjects attended to the lapse of time than when they attended to tasks during the target interval (Experiments 1 and 2). The characteristics of external stimuli irrelevant to the tasks, namely, the rate of presentation of sounds (Experiment 1) and the velocity of moving dots (Experiment 2), affected duration estimation, even though the attention level was little changed by these stimuli. These findings suggest that there are at least two independent cognitive factors that affect duration estimation.     

机器学习在儿童创伤后应激障碍识别及转归预测中的应用

创伤后应激障碍(PTSD)会给儿童发展带来负面效应,其影响甚至延续至成年期。然而传统诊断方式难以做到快速、客观、准确的识别和诊断儿童PTSD,机器学习作为一种处理大量变量和数据的新兴方法,逐渐被应用到儿童PTSD的早期预测、识别及辅助诊断等研究中。机器学习凭借其性能、原理等方面的优势,可被应用在儿童PTSD的识别与转归领域。相比自我报告式的诊断,通过机器学习辅助识别和诊断儿童PTSD的过程具有效率高、客观准确、节约资源等独特优势。然而,机器学习也在硬件成本、算法选择和预测准确度等方面存在局限性。未来研究人员需要进一步提高机器学习诊断识别儿童PTSD的准确率,并将机器学习算法同传统诊断方法结合进行更多的探索和应用。     

阅读知觉广度眼动研究述评

文章述评了测量阅读知觉广度的实验范式,并对阅读知觉广度的研究成果以及影响阅读知觉广度大小的因素进行小结,最后对国内研究阅读知觉广度需要注意的问题进行了讨论。     

Is Disgust a Homogeneous Emotion?

Many theoretical accounts consider disgust to be a unitary emotion, although others have challenged this notion. We predict that if core disgust and socio-moral disgust are different constructs, then their co-associated elicited emotions are likely to be different, and time as well as gender are likely to differentially affect their intensity (via a greater reliance of socio-moral disgust on cognitive appraisal). To test these predictions, participants were shown photographs of core and socio-moral disgust elicitors and asked to provide a wide ranging rating of their emotional response to each at 3 time points. Each elicitor generated a significantly different emotional response. Furthermore, the disgust response to core elicitors weakened over time whereas socio-moral responses intensified. Males and females showed similar levels of disgust to socio-moral elicitors, but females showed higher levels to core elicitors. Overall, the results suggest that a different emotional construct was activated by each type of elicitor.     

Primary school teachers’ perceptions of school children coping with changing family situations – a hybrid Hong Kong experience

The personal beliefs of teachers and the cultural traditions of society can have significant effects on the adjustment of children in changing family situations. This paper explores primary school teachers’ perception of children coping with difficult family situations and family changes in the hybrid context of Hong Kong, where Westernization meets with Chinese culture. A qualitative case study methodology was used. Thirty one teachers of different ages, experience, and roles at school were interviewed. The finding shows that teachers were on the whole quite traditional in their perception of children in difficult family situations despite the co-existence of modern ideas of marriage with traditional family values. Implications of the study for teacher education are discussed.     

“Why would you want to do that work?” The positive impact on therapists of working with child victims of sexual abuse in Ireland: a thematic analysis

Abstract

Research on the impact on psychotherapists of working with trauma has typically focused on negative impact and protective strategies and supports for therapists working in this field, such as self-care strategies and supervision. Yet many clinicians speak of the rewarding and fulfilling experiences of working with those who have been sexually abused. This study explored the positive impact of working with children who have been sexually abused in a sample of psychotherapists in Ireland. Unstructured interviews were conducted with nine female therapists who work in a specialist sexual abuse service with child victims of sexual abuse. An inductive thematic analysis identified four key themes: “the struggle to talk about the positive impact”, “professional satisfaction from helping children”, “learning life lessons from children” and “the magical connection that happens in therapy”. The findings show that, despite therapists’ tendency to think about negative impact, when encouraged to do so they described finding the work professionally rewarding, experiencing an enhancement of their own attitudes and lives through learning from the children they worked with and feeling uplifted within the therapeutic relationship with the child. Suggestions are offered for future research that may provide a broader understanding of the positive impact of this work.     

Meta-analysis of the association between rumination and reduced autobiographical memory specificity

The CaRFAX model, proposed by Williams J. M. G. (2006. Capture and rumination, functional avoidance, and executive control (CaRFAX): Three processes that underlie overgeneral memory. Cognition and Emotion, 20, 548–568. doi:10.1080/02699930500450465; Williams, J. M. G., Barnhofer, T., Crane, C., Herman, D., Raes, F., Watkins, E., &; Dalgleish, T. (2007). Autobiographical memory specificity and emotional disorder. Psychological Bulletin, 133(1), 122–148. doi:10.1037/0033-2909.133.1.122) posits that reduced autobiographical memory specificity, a key factor associated with the emergence and maintenance of emotional disorders, may result from heightened rumination. We provide the first meta-analysis of the relation between autobiographical memory specificity and trait rumination. PsycINFO, PsycARTICLES and MEDLINE databases were searched and the following were extracted: the correlation between the number of specific memories recalled in the Autobiographical Memory Test and self-reported trait rumination scores, and its sub-factors – brooding and reflection. The pooled effect size for the correlation between memory specificity and trait rumination was small (d?=??.05) and did not differ significantly from zero (p?=?.09). The effect sizes for the correlation with brooding and reflection were not significantly different from zero. There is limited support for the association between trait rumination and memory specificity suggested in CaRFAX.