Subtyping obsessive-compulsive disorder: A taxometric analysis

Obsessive-compulsive disorder (OCD) is a heterogeneous condition comprising multiple symptoms. Researchers have identified OCD subtypes using a range of symptom-based research methods, including factor and cluster analyses and examination of differential treatment response. These methods can be challenged on the grounds that they fail to demonstrate the existence of discrete taxonomic entities. Furthermore, no study has examined subtyping on the basis of cognitive characteristics. In the present study, the categorical vs. dimensional status of 6 possible subtypes of OCD was examined using taxometric methods. Three potential cognitive subtypes (based on high levels of responsibility/threat estimation, perfectionism/certainty, and importance/control of thoughts) and 3 potential symptomatic subtypes (based on elevated levels of contamination obsessions and cleaning compulsions, checking, and obsessionality) were examined using the MAXEIG and MAMBAC procedures in a sample of 404 diagnosed cases of OCD. Findings favored dimensional models of the potential responsibility, perfectionism, checking, and contamination subtypes, but offered qualified support for taxonic models of the importance/control of thoughts and obsessional subtypes. Implications for the subclassification of OCD are discussed.     

隔代“亲”的社会心理解析

隔代抚育中出现了普遍的隔代“亲”现象。本文分别从文化传统（血缘宗亲）、心理需求、社会现实、补偿心理等几个方面来阐述隔代“亲”的成因。     

A Dynamic, Multi-Level Model of Culture: From the Micro Level of the Individual to the Macro Level of a Global Culture

Cet article propose un modèle de la culture à plusieurs niveaux, composé de caractéristiques dynamiques et structurelles qui rendent compte de l’interaction entre les différents niveaux de culture. On commence par présenter un résumé des modèles existants de la culture, puis on poursuit en proposant le modèle de la culture à plusieurs nivaeux. La dimension structurelle représente la construction emboîtée de la culture depuis le niveau le plus extensif d’une culture globale jusqu’à la représentation de la culture au niveau individuel en passant par les cultures nationale, organisationnelle et de groupe. La nature dynamique de la culture évoque les processus descendants et ascendants quand l’un des niveaux culturels entraîne des changements à d’autres niveaux. Plus particulièrement, le modèle soutient que le niveau le plus global de la culture affecte, par l’internédiaire de processus descendants, les changements comportementaux des gens relevant de différentes cultures. Inversement, des changements comportementaux au niveau individuel deviennent, grâce aux processus ascendants, des valeurs et des normes comportementales partagées, modifiant la macroculture. L’article demande que l’om passe de la culture conçue comme une entité stable à la culture perçue comme étant une entité dynamique, et que l’on accorde davantage d’intérêt aux interactions entre les différents niveaux de culture. This paper proposes a multi‐level model of culture, consisting of structural and dynamic characteristics that explain the interplay between various levels of culture. The paper begins with a summary of existing models of culture and continues with the proposed multi‐level model of culture. The structural dimension represents the nested structure of culture from the most macro level of a global culture, through national, organisational and team cultures, and down to the representation of culture at the individual level. The dynamic nature of culture conveys the top‐down–bottom‐up processes where one cultural level affects changes in other levels of culture. Specifically, the model proposes that globalisation, as the macro level of culture, affects, through top‐down processes, behavioral changes of members in various cultures. Reciprocally, behavioral changes at the individual level, through bottom‐up processes, become shared behavioral norms and values, modifying the culture of a macro level entity. The paper calls for a shift in the research focus on culture as stable, to culture as a dynamic entity and for a greater focus on the interplay between different levels of culture.     

How checking as a cognitive style influences working memory performance

Compulsive checking is known to influence memory, yet there is little consideration of checking as a cognitive style within the typical population. We employed a working memory task where letters had to be remembered in their locations. The key experimental manipulation was to induce repeated checking after encoding by asking about a stimulus that had not been presented. We recorded the effect that such misleading probes had on a subsequent memory test. Participants drawn from the typical population but who scored highly on a checking‐scale had poorer memory and less confidence than low scoring individuals. While thoroughness is regarded as a quality, our results indicate that a cognitive style that favours repeated checking does not always lead to the best performance as it can undermine the authenticity of memory traces. This may affect various aspects of everyday life including the work environment and we discuss its implications and possible counter‐measures. Copyright © 2010 John Wiley & Sons, Ltd.     

Where to look first for an explanation of induction with uncertain categories

Recent research has examined how people predict unobserved features of an object when its category membership is ambiguous. The debate has focused on whether predictions are based solely on information from the most likely category, or whether information from other possible categories is also used. In the present experiment, we compared these category-based approaches with feature conjunction reasoning, where predictions are based on a comparison among exemplars (rather than categories) that share features with a target object. Reasoning strategies were assessed by examining patterns of feature prediction and by using an eye gaze measure of attention during induction. The main findings were (1) the majority of participants used feature conjunction rather than categorical strategies, (2) people predominantly gazed at the exemplars that were most similar to the target object, and (3) although people gazed most at the most probable category to which an object could belong, they also attended to other plausible category alternatives during induction. These findings question the extent to which category-based reasoning is used for induction when category membership is uncertain.     

Posttraumatic stress disorder following the September 11, 2001, terrorist attacks: a review of the literature among highly exposed populations

The September 11, 2001 (9/11), terrorist attacks were unprecedented in their magnitude and aftermath. In the wake of the attacks, researchers reported a wide range of mental and physical health outcomes, with posttraumatic stress disorder (PTSD) the one most commonly studied. In this review, we aim to assess the evidence about PTSD among highly exposed populations in the first 10 years after the 9/11 attacks. We performed a systematic review. Eligible studies included original reports based on the full Diagnostic and Statistical Manual of Mental Disorders (4th ed., rev.; American Psychiatric Association, 2000) criteria of PTSD among highly exposed populations such as those living or working within close proximity to the World Trade Center (WTC) and the Pentagon in New York City and Washington, DC, respectively, and first responders, including rescue, cleaning, and recovery workers. The large body of research conducted after the 9/11 attacks in the past decade suggests that the burden of PTSD among persons with high exposure to 9/11 was substantial. PTSD that was 9/11-related was associated with a wide range of correlates, including sociodemographic and background factors, event exposure characteristics, loss of life of significant others, and social support factors. Few studies used longitudinal study design or clinical assessments, and no studies reported findings beyond six years post-9/11, thus hindering documentation of the long-term course of confirmed PTSD. Future directions for research are discussed.     

Phantom arcs: now you see them..

A new visual illusion is reported and illustrated. The illusion, dubbed 'phantom arcs', survives manipulations of contrast, scale, and hue. The arcs can be seen in printed versions as well as in images displayed on CRT or LCD monitors. Data collected in an undergraduate perception class reveal that the illusion can be seen by untrained observers.     

Impaired emotion recognition in music in Parkinson’s disease

Music has the potential to evoke strong emotions and plays a significant role in the lives of many people. Music might therefore be an ideal medium to assess emotion recognition. We investigated emotion recognition in music in 20 patients with idiopathic Parkinson’s disease (PD) and 20 matched healthy volunteers. The role of cognitive dysfunction and other disease characteristics in emotion recognition was also evaluated.     

溶栓后PCI,从不行到可行

再灌注治疗STEMI的方法有直接PCI和溶栓。我国各地医疗条件差别较大,只有12%的STEMI患者能够及时接受直接PCI,超过半数的患者仍行溶栓治疗,故溶栓在我国再灌注策略中占有重要地位。虽然溶栓后即刻PCI即易化PCI被证实不如直接PCI,但溶栓并非STEMI治疗的终点。目前国外循证证据显示溶栓后早期转运PCI优于溶栓失败后再转运行补救PCI,值得我国借鉴学习。