Investigating semantic memory impairments: The contribution of semantic priming

Abstract

The semantic priming task is a valuable tool in the investigation of semantic memory impairments in patients with acquired disorders of language. This is because priming performance reflects automatic or implicit access to semantic information, unlike most other tests of semantic knowledge, which rely on explicit, voluntary access. Priming results are important for two main reasons: First, normal priming results may be observed in patients who perform poorly on other semantic memory tests, enabling us to distinguish between loss of, or damage to, information in semantic memory, and voluntary access to that information. Second, we can investigate the detailed pattern of loss and preservation of different types of semantic information, by charting the priming effects for different kinds of words, and different kinds of semantic relations between primes and targets.

We discuss the use of the priming task in this context, and address some of the theoretical and methodological criticisms that have been raised in connection with use of the priming task to address these issues. We then describe two recent studies in which we have employed semantic priming tasks, along with other more traditional methods, to investigate specific questions about the semantic memory deficits of three patients.     

Just world beliefs,perceived stress,and health behavior: The impact of a procedurally just world∗

Recent research suggests that a just world view may promote good health while low belief in a just world may deleteriously affect well-being. However, this research is limited in that specific components of justice beliefs that are important to health are not well articulated. Additionally, many potential pathways linking perceived fairness to physical health remain largely unexplored. In the present study, we examined how individual differences in both distributive (outcomes and allocations) and procedural (rules and processes) just world beliefs are associated with stress and health behavior. Participants were recruited from two universities (N = 426) to complete individual differences measures of procedural and distributive just world beliefs, and also measures of perceived stress, health behavior, and physical symptoms. Results suggested that procedural, but not distributive just world views were important to well-being. In particular, belief in a procedurally just world was associated directly with lower perceived stress, and also indirectly with adaptive health behaviors and fewer physical health complaints. In general, these results suggest that beliefs about a procedurally just world may be particularly important to well-being, while also suggesting specific directions and mechanisms for future attempts at developing justice-oriented health interventions.     

Virtual Learning in a Socially Digitized World

Contemporary education is awakening from a crisis that has held the development of its potential and its relevance at bay for well over a century. Revolutions in science and spirituality are emerging a new relational intelligence that demands commensurate educational paradigms for its blossoming into daily engagements with life and the world around us. At the same time as people are leading increasingly interconnected lives, aware of and often participating in the narratives of people and ecosystems in other parts of the planet, information and communications technologies are increasingly integrating with and serving to mediate the human experience. This article explores the power of this confluence at the current nexus of civilizational demands in the context of increased planetary stresses and destabilizations. The case is made for a thrivable education praxis that draws on these emergent aspects of our developmental potential and emphasizes the importance of functional conviviality as an operational principle of learning for life.     

Cognitive,affective and social mechanisms in depression risk: Cognition,hostility, and coping style

Although some research has assessed cognitive variables in individuals at risk for depression, few studies have specifically assessed the role of automatic thinking, and virtually no studies have assessed anger and coping in this group. The current study compared measures of these variables in a high-risk group that was defined on the basis of a previous episode of depression, and a control group comprised of low-risk/never depressed individuals. Even though neither group evidenced depressive symptoms at the time of assessment, group comparisons and regression analyses indicated that high-risk individuals reported more negative automatic thoughts than did low-risk participants and that social support seeking, self-blame, and avoidance emerged as coping predictors of risk as did higher levels of anger and hostility. These data thus suggest patterns of interpersonal, behavioural, and cognitive variables that may characterise depression risk.     

Event-related cerebral hemodynamics reveal target-specific resource allocation for both “go” and “no-go” response-based vigilance tasks

Transcranial Doppler sonography was used to measure cerebral blood flow velocity (CBFV) in the right and left cerebral hemispheres during the performance of a 50-min visual vigilance session. Observers monitored a simulated flight of unmanned aerial vehicles for cases in which one of the vehicles was flying in an inappropriate direction relative to its cohorts. Two types of vigilance tasks were employed: a traditional task in which observers made button press (“go”) responses to critical signals, and a modification of the traditional task called the Sustained Attention to Response Task (SART) in which “go” responses acknowledged nonsignal events and response withholding (“no-go”) signified signal detection. Signal detections and global CBFV scores declined over time. In addition, fine-grained event-related analyses revealed that the detection of signals was accompanied by an elevation of CBFV that was not present with missed signals. As was the case with the global scores, the magnitude of the transient CBFV increments associated with signal detection also declined over time, and these findings were independent of task type. The results support the view of CBFV as an index of the cognitive evaluation of stimulus significance, and a resource model of vigilance in which the need for continuous attention produces a depletion of information-processing assets that are not replenished as the task progresses. Further, temporal declines in the magnitude of event-related CBFV in response to critical signals only is evidence that the decrement function in vigilance is due to attentional processing and not specific task elements such as the required response format.     

Feedback and stimulus-offset timing effects in perceptual category learning

We examined how feedback delay and stimulus offset timing affected declarative, rule-based and procedural, information–integration category-learning. We predicted that small feedback delays of several hundred milliseconds would lead to the best information–integration learning based on a highly regarded neurobiological model of learning in the striatum. In Experiment 1 information–integration learning was best with feedback delays of 500 ms compared to delays of 0 and 1000 ms. This effect was only obtained if the stimulus offset following the response. Rule-based learning was unaffected by the length of feedback delay, but was better when the stimulus was present throughout feedback than when it offset following the response. In Experiment 2 we found that a large variance (SD = 150 ms) in feedback delay times around a mean delay of 500 ms attenuated information–integration learning, but a small variance (SD = 75 ms) did not. In Experiment 3 we found that the delay between stimulus offset and feedback is more critical to information–integration learning than the delay between the response and feedback. These results demonstrate the importance of feedback timing in category-learning situations where a declarative, verbalizable rule cannot easily be used as a heuristic to classify members into their correct category.     

代际团结潜在类别与关系质量对自陈健康及幸福感的影响

本研究考察了成年子女与其父母的代际关系中团结和关系质量对代际双方身体和心理结果的影响。研究1中,对中国成年子女（N=1283）的潜在类别分析结果显示是六种代际团结类别,多项逻辑回归表明两代人的特征会影响团结潜在类别和关系质量。研究2中,对367对中国成年子女-父母（N=734）的报告进行等级线性建模,行动者-搭档互依模型结果指出好的团结潜在类别（自我和搭档报告的）和好的关系质量（自我报告的）与两代人的高幸福感相关,好的团结潜在类别（自我和搭档报告的）和好的关系质量（自我和搭档报告的）预测了两代人的低心理苦恼;其中代际和性别调节了团结类别和关系质量对自我报告健康及幸福感的作用,同时,两代人团结类别的交互作用和评价的相似性也影响了幸福感和心理苦恼。     

Who self-initiates gratitude interventions in daily life? An examination of intentions,curiosity, depressive symptoms,and life satisfaction

Despite a variety of interventions to increase well-being, little is known about who is interested in and initiates exercises on their own. We explored individual differences that predict who is most likely to participate in a voluntary gratitude intervention. College students (n = 226) completed measures of curiosity, depressive symptoms, life satisfaction, and intentions to change their lifestyle. Afterwards, participants received a personalized invitation to take part in a web-based intervention to enhance their well-being (anonymous and strictly voluntary). Results suggested that 11.5% of participants started the gratitude intervention. Individuals endorsing strong intentions to change their lifestyle (+1 SD above mean) were 2.2 times more likely than their peers to start the gratitude intervention. People with greater trait curiosity endorsed greater intentions to start this intervention; people with greater depressive symptoms endorsed weaker intentions. Both curiosity and depressive symptoms indirectly influenced initiation of the gratitude intervention via intentions. These findings provide support for particular paths that lead to the initial behavioral effort towards healthy change. We discuss the implications for attempting to increase and sustain people’s well-being.     

Children and Adolescents with Medically Unexplained Symptoms: A Systematic Review of the Literature

Abstract

Medically unexplained symptoms (MUS) in children and adolescents are confounding and concerning for patients, parents, and health care practitioners. Our goal was to review and summarize the literature for family therapists working with a diverse, challenging patient population coping with MUS. A search of multiple databases from 1994 to 2018 was conducted using MUS and related terms. The literature was then organized into subcategories based on its relevance to family therapists, particularly medical family therapists collaborating with primary care physicians. We conclude with a discussion about gaps in the literature and suggestions for clinical management.     

WORKPLACE SOCIAL SUPPORT AND WORK-FAMILY CONFLICT: A META-ANALYSIS CLARIFYING THE INFLUENCE OF GENERAL AND WORK-FAMILY-SPECIFIC SUPERVISOR AND ORGANIZATIONAL SUPPORT

This article uses meta-analysis to develop a model integrating research on relationships between employee perceptions of general and work-family-specific supervisor and organizational support and work-family conflict. Drawing on 115 samples from 85 studies comprising 72,507 employees, we compared the relative influence of 4 types of workplace social support to work-family conflict: perceived organizational support (POS); supervisor support; perceived organizational work-family support, also known as family-supportive organizational perceptions (FSOP); and supervisor work-family support. Results show work-family-specific constructs of supervisor support and organization support are more strongly related to work-family conflict than general supervisor support and organization support, respectively. We then test a mediation model assessing the effects of all measures at once and show positive perceptions of general and work-family-specific supervisor indirectly relate to work-family conflict via organizational work-family support. These results demonstrate that work-family-specific support plays a central role in individuals' work-family conflict experiences.