Differential trajectories of age-related changes in components of executive and memory processes

Several studies have demonstrated age-related declines in general executive function and memory. In this study, we examined cross-sectional and longitudinal age effects in more specific cognitive processes that constitute executive function and memory. We postulated that, whereas some components of executive and memory functions would show age differences and longitudinal declines, other specific abilities would be maintained or even improve with repeated testing. In a sample of individuals ≥55 years old from the Baltimore Longitudinal Study of Aging, we found longitudinal declines in inhibition, manipulation, semantic retrieval, phonological retrieval, switching, and long-term memory over a maximum of 14 years follow-up. In contrast, abstraction, capacity, chunking, discrimination, and short-term memory were maintained or even improved longitudinally, probably due in part to repeated testing. Moreover, whereas several different abilities were correlated across participants' cross-sectional performance, longitudinal changes in performance showed more heterogeneous trajectories. Finally, compared with cross-sectional performance, longitudinal trajectories showed better distinction between participants with and those without later cognitive impairment. These results show that longitudinal cognitive aging of executive and memory functions is not a uniform process but a heterogeneous one and suggest that certain executive and memory functions remain stable despite age-related declines in other component processes. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

Health worker attitudes toward peer workers in hepatitis C prevention

Attitudes toward people who inject drugs (PWID) and attitudes toward peer workers among a cross-section of 101 Australian hepatitis C health workers were assessed. A survey consisting of Likert-type questions and one open-ended question regarding training was used. Bivariate and regression analyses demonstrated that health workers' attitudes toward peer workers were associated with their attitudes toward PWID, independent of type of organization or time in the hepatitis C sector. Qualitative analysis revealed four training areas suggested by health workers for peer workers. Implications of these findings for staff and peer training are discussed and future research directions suggested.     

Taxometric Investigation of PTSD: data from two nationally representative samples

Current psychiatric nosology depicts posttraumatic stress disorder (PTSD) as a discrete diagnostic category. However, only one study has examined the latent structure of PTSD, and this study suggested that PTSD may be more accurately conceptualized as an extreme reaction to traumatic life events rather than a discrete clinical syndrome. To build on the existing literature base, the present research examined the latent structure of posttraumatic stress reactions by applying three taxometric procedures (MAXEIG, MAMBAC, and L-Mode) to data collected from large nationally representative samples of women (ns = 2684 and 3033) and adolescents (n = 3775). Results consistently provided evidence for a dimensional PTSD solution across samples and statistical procedures. These findings have important implications for the theory, assessment, and investigation of posttraumatic stress reactions.     

視、听語文材料同时識記的干扰与相对优势

問題識記时若有两种或多种感觉通道同时活动,可能彼此助长,也可能相互干扰。这对于了解識記时神經中枢各部分的活动与相互影响可能有一定的启发意义。视、听两种感觉通道在学习时最常应用,两种感觉通道可以同时或先后接受同一的刺激物,也可接受不同的刺激物。以往关于比較視、听材料識記效果的研究較多,結果指出,两种感觉材料的識記效果一般难分高低,主要决定于材料的性貭与被試的經驗等条件。     

体育馆比赛厅观众席距离与视觉辨认的关系

問題 深入地探討体育館內观众席的视觉效果問題,是保証观众“看得好”的首要因素,是合理分布观众席、决定比賽厅平面形式(如圓形、椭圓形、方形、矩形等)的必备前提。决定观众席视觉效果的两大因素是观察距离及观察方位。关于这两个問題,国內外先后都进行过研究,但距离、方位与观众席分区方法的关系等問題,一般多局限在理論方面的討論,不能完全符合于实际情况。要对这些問題进行更深入的探討,必需进行视知觉心理学方面的实驗和研究,非仅靠建筑学知識所能解决,本研究卽试图通过知觉心理学的研究方法,对体育館比賽厅观众席距場地距离与視觉辨认的关系进行一些探索。     

Dealing with Big Numbers: Representation and Understanding of Magnitudes Outside of Human Experience

Being able to estimate quantity is important in everyday life and for success in the STEM disciplines. However, people have difficulty reasoning about magnitudes outside of human perception (e.g., nanoseconds, geologic time). This study examines patterns of estimation errors across temporal and spatial magnitudes at large scales. We evaluated the effectiveness of hierarchical alignment in improving estimations, and transfer across dimensions. The activity was successful in increasing accuracy for temporal and spatial magnitudes, and learning transferred to the estimation of numeric magnitudes associated with events and objects. However, there were also a number of informative differences in performance on temporal, spatial, and numeric magnitude measures, suggesting that participants possess different categorical information for these scales. Educational implications are discussed.     

Multiple channel exposure therapy for women with PTSD and comorbid panic attacks

Multiple channel exposure therapy (M-CET; Falsetti & Resnick, 2000) was developed to treat posttraumatic stress disorder (PTSD) with comorbid panic attacks and can be administered in a group format. In addition to being a cost-effective way to provide treatment, group treatment for those with PTSD has been proposed as potentially very beneficial for addressing feelings of shame related to the traumatic event as well as social isolation in general (Foy et al., 2000). Previous studies of M-CET indicate that it may be effective for the treatment of PTSD with comorbid panic attacks (Falsetti et al., 2001, 2003, 2005). The authors examine the relationship of PTSD and panic symptoms pre- and posttreatment and present 6-month follow-up data on the long-term effectiveness of M-CET.