Sleep deprivation impairs object recognition in mice

Many studies in animals and humans suggest that sleep facilitates learning, memory consolidation, and retrieval. Moreover, sleep deprivation (SD) incurred after learning, impaired memory in humans, mice, rats, and hamsters. We investigated the importance of sleep and its timing in an object recognition task in OF1 mice subjected to 6h SD either immediately after the acquisition phase (0-6 SD) or 6h later (7-12 SD), and in corresponding undisturbed controls. Motor activity was continuously recorded with infrared sensors. All groups explored two familiar, previously encountered objects to a similar extent, both at the end of the acquisition phase and 24h later during the test phase, indicating intact familiarity detection. During the test phase 0-6 SD mice failed to discriminate between the single novel and the two familiar objects. In contrast, the 7-12 SD group and the two control groups explored the novel object significantly longer than the two familiar objects. Plasma corticosterone levels determined after SD did not differ from time-matched undisturbed controls, but were significantly below the level measured after learning alone. ACTH did not differ between the groups. Therefore, it is unlikely that stress contributed to the memory impairment. We conclude that the loss of sleep and the activities the mice engaged in during the SD, impaired recognition memory retrieval, when they occurred immediately after acquisition. The delayed SD enabled memory consolidation during the 6h when the mice were allowed to sleep, and had no detrimental effect on memory. Neither SD schedule impaired object familiarity processing, suggesting that only specific cognitive abilities were sensitive to the intervention. Sleep may either actively promote memory formation, or alternatively, sleep may provide optimal conditions of non-interference for consolidation.     

Choose your lunch companion wisely: the relationships between lunch break companionship,psychological detachment,and daily vigour

This diary study examines psychological detachment, companionship, and content of conversation during lunch break as predictors of daily vigour after lunch break and at the end of the working day. Drawing on resource regulation theory and the effort recovery model (ERM), we hypothesize that companionship of the supervisor during lunch break is negatively and companionship of colleagues positively related to employee’s daily vigour. The companionship of both, supervisors and colleagues, as well as work-related conversations are hypothesized to decrease psychological detachment during lunch breaks. In total, 71 persons in administrative jobs completed daily surveys over one working week. Results of hierarchical linear modelling showed that psychological detachment is positively related to vigour after lunch break, but unrelated to vigour at the end of the working day. Lunch breaks with the supervisor predicted a lower level of vigour at the end of the working day, but a higher level of vigour after lunch break. Lunch breaks with colleagues were unrelated to vigour after lunch break, but associated with higher vigour at the end of a working day. The companionship of both—colleagues and supervisors—as well as work-related conversation decreased psychological detachment during lunch break.     

文化心理学的元理论突破及其局限性

文化心理学作为一个新兴的心理学取向,在很大程度上突破了主流心理学的元理论局限,提出了新的构建心理学理论体系的指导思想。这些思想为心理学的发展注入了新的血液,在很大的程度上促进了心理学的发展。但是,文化心理学有点矫枉过正,其元理论也存在着一定的不足,对之应有正确的认识。     

时距估计任务中的间断期望效应

使用单任务研究程序,采用引入提示线索的方法,以产生时距作为反应指标对存在间断的时距估计任务中的间断期望效应和提示线索效应（注意效应）进行系统考察,并对间断时距的效应、产生时距与等待时距的关系问题作出进一步探讨。结果表明,间断位置（等待时距）因素是被试时间判断的主要线索,被试的产生时距随着等待时距的增加而延长。间断实验中表现出极其显著的提示线索效应,此效应既增加了时距估计的变异,又延长了被试的时距估计。无间断实验条件下,被试表现出显著的间断期望效应,被试对间断的期望有损于时间估计。     

Sleepiness and days of recovery

In the literature recovery after work is taken for granted – one has 16 h off between work bouts and one has 36 h off each weekend. However, the situation for those working irregular work hours may be quite different because of night work, long shifts, or long sequences of working days. Strictly speaking we don't have any scientific support for theories on how recovery days should be patterned. This paper, therefore, brings together data from a series of our own studies that involve irregular work hours, with the specific purpose of looking at the recovery process. The results show that for the average normal office week worker two days of recovery are normally sufficient. For those who work long shifts in long sequences three days are needed for normalization, whereas 12 h shifts in 2–3 day sequences seem not to cause accumulated fatigue. Interestingly, fatigue/sleepiness is often at its peak during the first day of recovery – not the last day of the working week. Air crew and oil rig workers take a longer time to recover, probably because of too much adjustment of the biological clock. As a rule, long haul air crew is usually much more fatigued than short haul crew during their days off, despite the fact that long haul flying is voluntary and opted for by those who fly it. Also train drivers are affected during their days off by their irregular work hours – in particular backwards rotating schedules seem to cause accumulation of fatigue. The results suggest that one day of recovery never is sufficient, two days usually is, whereas 3–4 days are necessary after periods of severely disturbed circadian rhythmicity.     

禅宗心性学说中的心理治疗思想探究

禅宗心性学说中包含许多心理治疗的思想,对其挖掘与探究有着独特的价值。它的人性假设是人的当下自性是清净、空寂的;其病因理论认为人们的烦恼、苦难都是由于自心的执著导致;其治疗的方法核心是破除我法二执;其治疗的基本程序包括明心见性与修心养性两个阶段;其具体技术是禅定、正念、看话等方法。     

The cross-linguistic categorization of everyday events: a study of cutting and breaking

The cross-linguistic investigation of semantic categories has a long history, spanning many disciplines and covering many domains. But the extent to which semantic categories are universal or language-specific remains highly controversial. Focusing on the domain of events involving material destruction (“cutting and breaking” events, for short), this study investigates how speakers of different languages implicitly categorize such events through the verbs they use to talk about them. Speakers of 28 typologically, genetically and geographically diverse languages were asked to describe the events shown in a set of videoclips, and the distribution of their verbs across the events was analyzed with multivariate statistics. The results show that there is considerable agreement across languages in the dimensions along which cutting and breaking events are distinguished, although there is variation in the number of categories and the placement of their boundaries. This suggests that there are strong constraints in human event categorization, and that variation is played out within a restricted semantic space.     

Edward said: Identity,politics and history 1

Abstract

This paper draws on the work of Edward Said in order to extend understandings of the social and historical roots of identity, and to introduce possible new insights into the inextricable relationship between the West and the Rest. Edward Said, a critical thinker and exponent of postcolonial theory, was profoundly concerned with a range of political, historical and literary matters. His concerns focused on elucidating and analysing the social and political conditions that he argued are shot through culture. For Said nothing and no-one is immune from history, ideology or the political and social conditions that we inhabit. Said's preoccupation focused on illuminating that which is irreconcilable and he emphasized the tensions and contradictions in texts and in societies (especially America and the Middle East). His political and literary writing is ethical as it emphasizes the psychoanalytic endeavour to continually think anew and to investigate one's projections and illusions. There is no place for complacency in Said's work.     

Omnipotence in the transference and in the countertransference

The concept of omnipotence refers to a primitive fantasy, a mechanism of defense, and a pathological psychic structure. Omnipotence and its derivative defensive operation, omnipotent control, are highly prevalent in borderline personality organization. Three clinical vignettes illustrate these mechanisms in the treatment of patients with borderline, narcissistic, and obsessive personality disorders, respectively. These vignettes illustrate the transference developments when omnipotence and omnipotence control are dominant, and the therapeutic approach to these conditions.