Executive functioning and processing speed in age-related differences in time estimation: a comparison of young,old, and very old adults

Age-related differences in time estimation were examined by comparing the temporal performance of young, young–old, and old–old adults, in relation to two major theories of cognitive aging: executive decline and cognitive slowing. We tested the hypothesis that processing speed and executive function are differentially involved in timing depending on the temporal task used. We also tested the assumption of greater age-related effects in time estimation in old–old participants. Participants performed two standard temporal tasks: duration production and duration reproduction. They also completed tests measuring executive function and processing speed. Findings supported the view that executive function is the best mediator of reproduction performance and inversely that processing speed is the best mediator of production performance. They also showed that young–old participants provide relatively accurate temporal judgments compared to old–old participants. These findings are discussed in terms of compensation mechanisms in aging.     

A Heideggerian Defense of Therapeutic Cloning

Debates about the legitimacy of embryonic stem-cell research have largely focused on the type of ethical value that should be accorded to the human embryo in␣vitro. In this paper, I try to show that, to broaden the scope of these debates, one needs to articulate an ontology that does not limit itself to biological accounts, but that instead focuses on the embryo’s place in a totality of relevance surrounding and guiding a human practice. Instead of attempting to substantiate the ethical value of the embryo exclusively by pointing out that it has potentiality for personhood, one should examine the types of practices in which the embryo occurs and focus on the ends inherent to these practices. With this emphasis on context, it becomes apparent that the embryo’s ethical significance can only be understood by elucidating the attitudes that are established towards it in the course of specific activities. The distinction between fertilized embryos and cloned embryos proves to be important in this contextual analysis, since, from the point of view of practice, the two types of embryos appear to belong to different human practices: (assisted) procreation and medical research, respectively. In my arguments, I highlight the concepts of practice, technology, and nature, as they have been analyzed in the phenomenological tradition, particularly by Martin Heidegger. I come to the conclusion that therapeutic cloning should be allowed, provided that it turns out to be a project that benefits medical science in its aim to battle diseases. Important precautions have to be taken, however, in order to safeguard the practice of procreation from becoming perverted by the aims and attitudes of medical science when the two practices intersect. The threat in question needs to be taken seriously, since it concerns the structure and goal of practices which are central to our very self understanding as human beings.     

时距估计年龄差异的认知机制

采用双任务的实验范式,通过对（5s、13s和26s）三个目标时距的产生法和复制法的结果来探讨时距估计年龄差异的认知机制。实验结果表明,在不同目标时距和不同的估计方法上均存在显著的年龄效应。年老被试在产生法上比年轻被试显著高估时距,存在非时间任务和年龄的交互作用,随着任务难度的增加年老被试会比年轻被试产生更长的时距。而在复制法上年老被试比年轻被试显著低估时距,但是只有在长时距条件下（26s）存在非时间任务和年龄的交互作用。本研究结果表明年老被试在产生法上对时距的高估可能与内部时钟减慢和注意资源减少有关,而在复制法上对时距的低估可能反映注意资源的减少。此外,对于长时距的时间复制,情节记忆的损伤也是导致时距估计年龄差异的一个可能原因。     

Just Ignore It? Parents and Genetic Information

This paper discusses whether prospectiveparents ought to find out about their geneticconstitution for reproductive reasons. It isargued that ignoring genetic information can bein line with responsible parenthood or perhapseven recommendable. This is because parenthoodis essentially an unconditional project inwhich parents ought to commit themselves tonurturing any kind of child. Besides, thetraditional reasons offered for theunfortunateness of impairments and the tragicfate of families with disabled children are notconvincing. Other morally problematic outcomesof genetics, such as discrimination againstindividuals with impairments, and limiting freeparental decision making, are alsoconsidered.     

Rank and reproduction among female langur monkeys: Aging and improvement (They're not just getting older,they're getting better)

An investigation of the social rank, reproduction, and ages of adult female Indian gray langur monkeys (Presbytis entellus) living in two colony social groups revealed that rank based on displacements is neither correlated with nor best predicted by female age or reproductive value. The hierarchy of female ranks is best conceptualized as a layered ranking system in which there are clusters of females of the same dominance rank forming layers within the structure. Statistical significance in frequencies of displacement differs between but not within these layered groups of females. Factors such as group composition, presence of uterine kin, reproductive state, and individual personality are hypothesized to predict changes in female rank far better than does reproductive value. Our data show that reproductive success increases with age. The infant survival record for the six oldest females in our colony was much better than for the five youngest adult females.     

The Seminal Contribution of Rabbi Moshe Feinstein to the Development of Modern Jewish Medical Ethics

The purpose of this essay is to show how, on a wide variety of issues, Rabbi Moshe Feinstein broke new ground with the established Orthodox rabbinic consensus and blazed a new trail in Jewish medical ethics. Rabbi Feinstein took power away from the rabbis and let patients decide their treatment, he opened the door for a Jewish approach to palliative care, he supported the use of new technologies to aid in reproduction, he endorsed altruistic living organ donation and recognized brain death (thus laying the groundwork for Orthodox Jewish acceptance of heart transplantation), he downplayed the value of social worth in triage decisions, and was a fierce defender of the rights of the fetus. I develop broader theological principles from Rabbi Feinstein's ethical positions and compare them to those of his Jewish and Christian contemporaries.     

神经培养的发展史与启示

简述神经培养技术与各学科关系的现状并回顾神经培养的发展历史,将神经培养历史划分为萌芽期、起步期、迅速发展阶段和新发展阶段等.从神经培养技术发展的角度入手,分析了新技术的突破与学科发展的密切关系.     

Book review

Wheeldon, L. (Ed.). (2000). Aspects of language production. Hove, UK: Psychology Press. Pp.419. ISBN 0-86377-882-8. Price £3995 (Hbk). ISBN 0-86377-883-6. Price £1995 (Pbk, published 2002).     

WOMB TRANSPLANTATION AND THE INTERPLAY OF ISLAM AND THE WEST

In Saudi Arabia in 2000 the world's first human uterus transplant was attempted with some success. In 2011 the second successful human uterus transplant took place in Turkey. Doctors in the United Kingdom have recently announced that uterus transplants will be carried out in the UK if doctors can raise enough funds to complete their research. As scientists continue to make progress in this domain this is anticipated to be the next breakthrough in the arena of assisted reproductive technologies. The procedure is designed to restore fertility in women unable to gestate due to an abnormal, damaged, or absent uterus. At present, the only other option for such women to achieve genetic motherhood is via surrogacy, which in Islam is widely regarded as haram or forbidden. This article examines the benefits of this technology so as to facilitate discourse between Islam and the West. It argues for Islamic scholars to consider these advances so as to ensure Muslims living as minorities in Western countries, such as the United Kingdom, are able to utilize such technology (if indeed regarded as permissible) should the government move to enact legislation to permit this procedure.