Differential brain shrinkage over 6 months shows limited association with cognitive practice

The brain shrinks with age, but the timing of this process and the extent of its malleability are unclear. We measured changes in regional brain volumes in younger (age 20–31) and older (age 65–80) adults twice over a 6 months period, and examined the association between changes in volume, history of hypertension, and cognitive training. Between two MRI scans, 49 participants underwent intensive practice in three cognitive domains for 100 consecutive days, whereas 23 control group members performed no laboratory cognitive tasks. Regional volumes of seven brain structures were measured manually and adjusted for intracranial volume. We observed significant mean shrinkage in the lateral prefrontal cortex, the hippocampus, the caudate nucleus, and the cerebellum, but no reliable mean change of the prefrontal white matter, orbital-frontal cortex, and the primary visual cortex. Individual differences in change were reliable in all regions. History of hypertension was associated with greater cerebellar shrinkage. The cerebellum was the only region in which significantly reduced shrinkage was apparent in the experimental group after completion of cognitive training. Thus, in healthy adults, differential brain shrinkage can be observed in a narrow time window, vascular risk may aggravate it, and intensive cognitive activity may have a limited effect on it.     

Abuse and religious experience: A study of religiously committed evangelical adults

Two hypotheses were tested: (1) in a sample of religiously-committed evangelical adults, past experience of abuse is related to more frequent (a) religious behaviour such as prayer, church attendance and Bible reading, and (b) religious experiences, such as religious visions, healings and speaking in tongues; (2) abuse is also associated with evidence of alienation from God, as noted in more frequent reports of God as distant and more frequent religious doubting. Survey data from 3424 adults attending one of four new evangelical movement churches were analysed. Controlling for socio-economic and religious socialization variables, a series of regression equations were calculated looking at the relationship between the experience of abuse and the dependent variables of three factor scores representing conventional religious behaviour, transcendent religious experience and feelings of distance from God. Self-report of the frequency of abuse was positively associated with frequency of reported transcendent religious experiences and with feelings of distance from God. A significant relationship between abuse and more conventional religious behaviour was not found. The findings provide mixed support for the idea that abuse results in ambivalent responses toward religion and God in religiously committed adults. The lack of relationship between abuse and conventional religious behaviours is somewhat inconsistent with prior results, and likely represents a ceiling effect. The positive correlation with transcendent religious experiences and distance from God are consistent with prior studies, but may suggest alternative explanations.     

Between Subjects: Commentary on Paper by Robert P. Drozek

This commentary on Drozek's paper outlines its key points under 10 headings, looking at various aspects of the intrapsychic and intersubjective elements involved in understanding motivation. There is discussion of issues of autonomy and dignity based upon Kant's philosophy that underpin the paper's assumptions about unconditional valuing of the other as a universal element of intersubjective motivation. In the commentary attention is paid to the role of desire in motivation, as well as some of the psychoanalytical literature on motivation, including papers by Sandler, Loewald, and Winnicott, some aspects of which connect up with the paper's theses. At various points, some of the clinical relevance of the paper's proposals are brought to light, in particular how the patient may be in a position to use the analyst's interventions as a source of intersubjective motivation.     

Chimpanzee (Pan troglodytes) relational matching: playing by their own (analogical) rules

Chimpanzees (Pan troglodytes) have been known to exhibit rudimentary abilities in analogical reasoning (Flemming, Beran, Thompson, Kleider, & Washburn, 2008; Gillian, Premack, & Woodruff, 1981; Haun & Call, 2009; Thompson & Oden, 2000; Thompson, Oden, & Boysen, 1997). With a wide array of individual differences, little can be concluded about the species' capacity for analogies, much less their strategies employed for solving such problems. In this study, we examined analogical strategies in 3 chimpanzees using a 3-dimensional search task (e.g., Kennedy & Fragaszy, 2008). Food items were hidden under 1 of 2 or 3 plastic cups of varying sizes. Subsequently, chimpanzees searched for food under the cup of the same relative size in their own set of cups--reasoning by analogy. Two chimpanzees initially appeared to fail the first relational phase of the task. Meta-analyses revealed, however, that they were instead using a secondary strategy not rewarded by the contingencies of the task--choosing on the basis of the same relative position in the sample. Although this was not the intended strategy of the task, it was nonetheless analogical. In subsequent phases of the task, chimpanzees eventually learned to shift their analogical reasoning strategy to match the reward contingencies of the task and successfully choose on the basis of relative size. This evidence not only provides support for the analogical ape hypothesis (Thompson & Oden, 2000), but also exemplifies how foundational conceptually mediated analogical behavior may be for the chimpanzee.     

V—Naive Realism and Experiential Evidence

I describe a naive realist conception of perceptual knowledge, which faces a challenge from the idea that normal perceivers and brains-in-vats have equally justified perceptual beliefs. I defend the naive realist position from Nicholas Silins's recent version of this challenge. I argue that Silins's main objection fails, and that the naive realist understanding of perceptual knowledge can be reconciled with the idea that brains-in-vats have justified perceptual beliefs.     

Young citizens in Hong Kong: obedient,active and patriotic?

There are multiple ways of understanding citizenship: as a status conferred by a nation state, a personal identity constructed in response to particular circumstances or a social identity developed out of group membership. These are not mutually exclusive categories: an individual may experience “citizenships” that integrate these legal, personal and social identities. Yet how do young people who are not yet citizens understand what it means to be a citizen? In the present study, 15-year-old Hong Kong students were surveyed 2 years after the transition from colonial rule to Chinese sovereignty. They were asked to respond to a series of questions about citizenship responsibilities and the way they saw these reflected in ‘good citizens’. The results showed that students viewed citizenship responsibilities as multidimensional with reference to specific groups. They identified legal obligations related to civil authorities, personal obligations to support other members of the community and patriotic obligations to support the nation-state.