The update of semantic memories in amnestic mild cognitive impairment

It is still controversial to what extent neocortical consolidated memories are susceptible of change by processes of reconsolidation and transformation throughout experience, and whether the medial temporal lobes are necessary for this update of semantic consolidated memories, as they are for episodic remembering. We hypothesize that patients with amnestic mild cognitive impairment (aMCI) who have deficits in episodic memory may also have difficulties in updating information on added new features of objects. Sixteen participants with aMCI and 20 healthy control participants performed a semantic word-to-picture task, in which they were asked to identify as belonging to a given semantic category NEW objects, that have incorporated novel features, as well as OLD items, semantically and visually SIMILAR items and UNRELATED items. Patients with aMCI made a greater percentage of errors than healthy controls. Participants globally made greater percentages of errors in difficult types of items, namely NEW and SIMILAR, as compared to easier ones, OLD and UNRELATED. Importantly, an item by diagnostic group interaction effect was observed, and post hoc analysis showed that patients with aMCI made a higher percentage of errors than controls in NEW items only. In conclusion, patients with aMCI had a particular difficulty in identifying the NEW items of the word-to-picture task as compared to the control participants, supporting the concept of a flexible and dynamic conceptual knowledge system, involving the update of semantic memories and the integration of new attributes in a constant transformation process, which is impaired in these patients.     

The reciprocal relation between sleep and memory in infancy: Memory‐dependent adjustment of sleep spindles and spindle‐dependent improvement of memories

Sleep spindle activity in infants supports their formation of generalized memories during sleep, indicating that specific sleep processes affect the consolidation of memories early in life. Characteristics of sleep spindles depend on the infant's developmental state and are known to be associated with trait‐like factors such as intelligence. It is, however, largely unknown which state‐like factors affect sleep spindles in infancy. By varying infants’ wake experience in a within‐subject design, here we provide evidence for a learning‐ and memory‐dependent modulation of infant spindle activity. In a lexical‐semantic learning session before a nap, 14‐ to 16‐month‐old infants were exposed to unknown words as labels for exemplars of unknown object categories. In a memory test on the next day, generalization to novel category exemplars was tested. In a nonlearning control session preceding a nap on another day, the same infants heard known words as labels for exemplars of already known categories. Central–parietal fast sleep spindles increased after the encoding of unknown object–word pairings compared to known pairings, evidencing that an infant's spindle activity varies depending on its prior knowledge for newly encoded information. Correlations suggest that enhanced spindle activity was particularly triggered, when similar unknown pairings were not generalized immediately during encoding. The spindle increase triggered by previously not generalized object–word pairings, moreover, boosted the formation of generalized memories for these pairings. Overall, the results provide first evidence for a fine‐tuned regulation of infant sleep quality according to current consolidation requirements, which improves the infant long‐term memory for new experiences.     

Explaining individuals' justification of layoffs

This research addresses why organizational downsizing, given its adverse impact on both organizations and individuals, continues to be a popular management practice. Drawing on system justification theory, we argue that individuals justify downsizing to preserve the legitimacy of the prevailing social‐political system. Across two studies, we surveyed a total of 527 employees and examined whether the perceived likelihood of downsizing, past experiences of layoffs, and the anticipation of future layoffs enhance individuals' justification of downsizing. We also took into account cognitive and motivational biases for justifying the status quo. Our results indicate that individuals' motivation to defend and justify downsizing may strengthen its stability within society, even though implications are largely negative for those involved.     

Neurocognitive start-up tools for symbolic number representations

Attaching meaning to arbitrary symbols (i.e. words) is a complex and lengthy process. In the case of numbers, it was previously suggested that this process is grounded on two early pre-verbal systems for numerical quantification: the approximate number system (ANS or 'analogue magnitude'), and the object tracking system (OTS or 'parallel individuation'), which children are equipped with before symbolic learning. Each system is based on dedicated neural circuits, characterized by specific computational limits, and each undergoes a separate developmental trajectory. Here, I review the available cognitive and neuroscientific data and argue that the available evidence is more consistent with a crucial role for the ANS, rather than for the OTS, in the acquisition of abstract numerical concepts that are uniquely human.     

Local Identity and the Role of Individual Differences in the Use of Natural Resources: The Case of Water Consumption1

A field study assessed the role of social value orientation (SVO) and identification with the local community on water conservation behavior in Italy. Participants (N = 758) completed a self‐reported questionnaire, during summer and Easter time. It was expected that SVO and local identification would affect cooperation in conserving water resources. Consistent with the hypotheses, the highest levels of voluntary cooperation were detected among prosocial persons with high local identity, while the lowest levels of cooperation were detected among proself persons with low local identity. Other factors (e.g., perception of local authority's legitimacy, place of residence, severity of water scarcity condition) did not affect the hypothesized interaction. The theoretical and practical implications of the findings are discussed.     

The association between prenatal exposure to cigarettes and infant and maternal negative affect

This study examined the association between prenatal exposure to cigarettes and infant and maternal negative affect. Participants were 115 mother-infant dyads (69 prenatally exposed to cigarettes and 46 nonexposed). Infant and maternal negative affect were both assessed during the neonatal period (2-4 weeks of age) and again at 7 months of infant age. Results indicated that only prenatal exposure to cigarettes predicted infant negative affect. Infants who were prenatally exposed to more cigarettes had higher levels of negative affect at both time points. Furthermore, regression analyses indicated that both infant and maternal negative affect during the neonatal period predicted maternal negative affect at 7 months of age. These results highlight the importance of considering the reciprocal relationship between infant and maternal behavior when examining developmental outcomes among infants prenatally exposed to cigarettes.     

Role of the Disease in the Psychological Impact of Pre-Symptomatic Testing for SCA2 and FAP ATTRV30M: Experience with the Disease, Kinship and Gender of the Transmitting Parent

To identify possible factors affecting the psychological impact of pre-symptomatic testing for spinocerebellar ataxia type 2 (SCA2) and familial amyloid polyneuropathy (FAP ATTRV30M), we studied (1) the effect of previous experience with the disease in the family, (2) kinship with the closest affected relative and (3) gender of affected parent, when adapting to test results; as well as (4) differences in the course of psychological wellbeing in 63 subjects ( 28 at-risk for FAP ATTRV30M, and 35 at risk for SCA2), who pursued predictive testing for these diseases, in Cuba and in Portugal. Our research shows that individuals with little or no experience with the disease in their family exhibited more anxiety; at-risk subjects for SCA2 or FAP ATTRV30M who had a first degree relative with the disease showed lower levels of anxiety and depression during pre-symptomatic testing. Also those with an affected mother had lower levels of depression, either immediately, or one year after receipt of test results. Adaptation to pre-symptomatic testing results differed for subjects at-risk for the two different conditions. Unlike the FAP ATTRV30M families, carriers for SCA2 reported pathological levels of depression immediately after-testing (3 weeks), although those levels had returned to normal levels at 6 months. Subjects at-risk for FAP ATTRV30M tended to have less anxiety than those tested for SCA2, at the one-year follow-up. Overall, depression levels improved over time, while anxiety remained more constant. A longer awareness of the disease in the family, closer kinship, and a transmitting mother all lessened the impact of pre-symptomatic testing, as expressed by the post-test levels of anxiety and depression.     

Creativity across Cultures: A Comparison between Ugandan and Italian Students

The purpose of this research was to compare the creative performance of students belonging to 2 different cultures, Italian and Ugandan. The participants were 462 children between the ages of 6 and 14 (231 in each group). The children were distributed across the age groups, between the 1st and 7th years of primary school. This study used a quantitative methodology and an intercultural perspective to explore the socio-cultural variables involved in defining and expressing creative action. To evaluate creative performance, Williams’s TCD (Test of Creativity and Divergent Thinking, 1996) was used along with a questionnaire to identify socio-anagraphical characteristics. An analysis of variance (ANOVA) revealed no statistically significant difference between the averaged total scores of the two groups on creativity and divergent thinking tests. However, Ugandan and Italian students had statistically significant differences in the flexibility (FS) category, with Italian students earning higher scores than the Ugandan students, and also in fluency (FL), where the Ugandan children achieved higher scores than the Italian ones.     

Community psychology: should there be a European perspective?

In this era of globalisation community psychologists have to examine how globalisation patterns interact with local cultural norms, to find tools to promote a sense of community that fits a particular context. We cannot therefore acritically adopt for many European contexts, community psychology concepts and intervention strategies geared to USA values. The paper argues for the need to develop a European perspective in Community Psychology, built more on the European tradition of political concern for promoting social capital, besides an individual's freedom and autonomy. The paper attempts to identity some of the main differences that have emerged in the last decades between USA and European approaches to community psychology. It also describes two empowering tools, which integrate traditional and post modern views of science: community profiling and multidimensional organisational analysis, that have been used by European community psychologists to rebuild social capital in organisations and local communities. Copyright © 2001 John Wiley & Sons, Ltd.