Risk- and protective factors for memory plasticity in aging

ABSTRACT

Risk and protective factors for cognitive function in aging may affect how much individuals benefit from their environment or life experiences by preserving or improving cognitive abilities. We investigated the relations between such factors and outcome from episodic-memory training in 136 healthy young and older adults. Tested risk factors included carrying the ?4 variant of the apolipoprotein E allele (APOE), age, body mass index, blood pressure, and cholesterol. Protective factors included higher levels of education, intelligence quotient (IQ), physical activity, fatty acids, and vitamin D. Average increases in memory performance were seen after training, with ample variation between individuals. Being young, female, and having higher IQ were positive predictors of memory improvement. No other relationships were observed. Similar benefit was observed across APOE allelic variation. This indicates that beyond IQ, age, and sex, known risk -and protective factors of cognitive function in aging were not significantly related to memory plasticity.     

Network Connectivity Dynamics,Cognitive Biases,and the Evolution of Cultural Diversity in Round-Robin Interactive Micro-Societies

The distribution of cultural variants in a population is shaped by both neutral evolutionary dynamics and by selection pressures. The temporal dynamics of social network connectivity, that is, the order in which individuals in a population interact with each other, has been largely unexplored. In this paper, we investigate how, in a fully connected social network, connectivity dynamics, alone and in interaction with different cognitive biases, affect the evolution of cultural variants. Using agent-based computer simulations, we manipulate population connectivity dynamics (early, mid, and late full-population connectivity); content bias, or a preference for high-quality variants; coordination bias, or whether agents tend to use self-produced variants (egocentric bias), or to switch to variants observed in others (allocentric bias); and memory size, or the number of items that agents can store in their memory. We show that connectivity dynamics affect the time-course of variant spread, with lower connectivity slowing down convergence of the population onto a single cultural variant. We also show that, compared to a neutral evolutionary model, content bias accelerates convergence and amplifies the effects of connectivity dynamics, while larger memory size and coordination bias, especially egocentric bias, slow down convergence. Furthermore, connectivity dynamics affect the frequency of high-quality variants (adaptiveness), with late connectivity populations showing bursts of rapid change in adaptiveness followed by periods of relatively slower change, and early connectivity populations following a single-peak evolutionary dynamic. We evaluate our simulations against existing data collected from previous experiments and show how our model reproduces the empirical patterns of convergence.     

Investigating socio-emotional cognition in late preterm children: A case-control study

ABSTRACT

This study aimed to investigate socio-emotional cognitive competence in late preterm and term born children. Late preterm children (n = 53; 5–10 years) and full-term control children (n = 53; 5–10 years) were evaluated on the four socio-emotional cognitive tests of the Intelligence and Development Scales (IDS): emotion recognition, emotion regulation, social understanding, and social behavioural competence. Compared to full-term children, late preterm children (LPT) performed significantly worse on the emotion recognition and social behavioural competence tasks, but otherwise, no significant differences were found in emotion regulation and social understanding tasks. These findings support the conclusion that late-preterm birth may be associated with negative, but selective, socio-emotional cognitive difficulties. Targeted interventions aimed to limit the incidence of these dysfunctions during childhood could be quite important for LPT children.     

Strategies in Syllogistic Reasoning

This paper is about syllogistic reasoning, i.e., reasoning from such pairs of premises as, All the chefs are musicians; some of the musicians are painters. We present a computer model that implements the latest account of syllogisms, which is based on the theory of mental models. We also report four experiments that were designed to test this account. Experiments 1 and 2 examined the strategies revealed by the participants' use of paper and pencil as aids to reasoning. Experiment 3 used a new technique to externalize thinking. The participants had to refute, if possible, putative conclusions by constructing external models that were examples of the premises but counterexamples of the conclusions. Experiment 4 used the same techniques to examine the participants' strategies as they drew their own conclusions from syllogistic premises. The results of the experiments showed that individuals not trained in logic can construct counterexamples, that they use similar operations to those implemented in the computer model, but that they rely on a much greater variety of interpretations of premises and of search strategies than the computer model does. We re-evaluates current theories of syllogistic reasoning in the light of these results.     

Differences between girls and boys in emerging language skills: Evidence from 10 language communities

The present study explored gender differences in emerging language skills in 13,783 European children from 10 non‐English language communities. It was based on a synthesis of published data assessed with adapted versions of the MacArthur‐Bates Communicative Development Inventories (CDIs) from age 0.08 to 2.06. The results showed that girls are slightly ahead of boys in early communicative gestures, in productive vocabulary, and in combining words. The difference increased with age. Boys were not found to be more variable than girls. Despite extensive variation in language skills between language communities, the difference between girls and boys remained. This suggests that the difference is caused by robust factors that do not change between language communities.     

The selfish preen: absence of allopreening in Palaeognathae and its socio-cognitive implications

Animal Cognition - Preening behaviours are widespread in extant birds. While most birds appear to autopreen (self-directed preening), allopreening (preening directed at conspecifics) seems to have...     

Creating space for interdisciplinary and interagency learning: the Newham ‘responsiveness’ days

Family therapists in Newham's specialist child and adolescent mental health services describe an interdisciplinary and interagency training day for Newham's children's workforce; the workshop aims to develop co‐learning about communication and collaboration in the context of a rapidly changing service environment, driven by current national and local policy initiatives. The training team attempts to generate a rich learning context using three themes: networking, responsiveness and complexity. The workshop demonstrates that it is perhaps possible to embed complex communication discourses in brief, pragmatic training, enhancing collaboration between professionals in local networks.