Type 2 Diabetes Mellitus and Cognitive Performance in a Population-Based Sample of the Oldest Old: Impact of Comorbid Dementia

We examined the relationship between type 2 diabetes mellitus and cognitive function in a population-based sample of very old people. The sample comprised 338 persons, aged 80-93 years (mean age 83.5 years), of whom 70 persons had type 2 diabetes mellitus. Measures of cognitive functioning included tests of perceptual speed, visuo-spatial ability, inductive reasoning, short-term memory, semantic memory, episodic memory, and the Mini-Mental State Examination. Regression analyses showed that type 2 diabetes mellitus duration was related to test performance across all cognitive domains, with the exception of short-term memory, such that longer duration was associated with lower test performance. When cases with dementia were excluded from the sample, further analyses showed that diabetes duration was not associated with cognitive test performance. This indicates that diabetes is not related to lower cognitive function in the general population of non-demented old people. Diabetes, however, increases the risk for cerebrovascular incidents, like stroke, that may contribute to vascular dementia.     

Relationships between ability and personality:does intelligence contribute positively to personal and social adjustment?

Intelligence/personality associations were studied in four large datasets. Correlations between general ability (g) and major personality traits were generally consistent with previous findings. For other traits, an interpretation of the correlation patterning is that traits classifiable as adaptive in terms of personal and social adjustment have positive correlations with g, whilst maladaptive traits have negative correlations. Regression modelling confirmed these associations and structural equation modelling of selected traits showed that Neuroticism acts as a mediator of g on the outcome. Non-linear relationships between intelligence and personality were not found. In two of the datasets the correlation between Neuroticism and Psychoticism decreased with ability level, and the correlation between fluid and crystallised ability increased with level of Neuroticism.     

Success and Gender: Determining the Rate of Advancement for Intercollegiate Athletic Directors

Since the demise of the Association for Intercollegiate Athletics for Women (AIAW), female sport administrators have continued their struggle to reestablish their place as athletic directors. The purpose of this study was to assess the rate of advancement (success ratio) of intercollegiate athletic directors, with a primary focus on gender. Athletic directors from 157 NCAA (National Collegiate Athletics Association) member institutions participated in the study. The preliminary results confirmed the expected findings that hegemonic masculinity was entrenched within intercollegiate athletics. The success ratio of male athletic directors differed from that of female athletic directors, and the difference was significant (p ≤ .05). The success ratio for men was higher than the ratio for women. Further analyses, however, showed that female athletic directors had higher success ratios than their male peers at lower level institutions. Although parity in numbers has not yet been achieved across the NCAA, the glass ceiling at Division I institutions may begin to crack as more women achieve success at the lower level institutions.     

Religious Ethics and the Environment

This essay discusses three recent books which each offer an integrative account of religious ethics and the environment. Religious environmental ethics is an area of inquiry within the larger field of religion and ecology. After a narrative that contextualizes the development of religious environmental ethics in relation to the environmental social movement, I describe the formation of the field including its focus on worldview, the “cosmological turn,” and its engagement with science, the “cosmic turn.” Elizabeth Johnson exemplifies the cosmic turn by developing a Christian theology of life in nature which explicitly accepts Darwin's theory of evolution. Willis Jenkins advocates a prophetic pragmatism and critiques a focus on worldview that is abstracted from practice and defers moral responsibility. Larry Rasmussen joins analysis of worldview with reflection on cross‐cultural resources for “anticipatory communities” of moral formation to catalyze change. I argue with Rasmussen that religious environmental ethics needs multiple approaches and should allow room for methodological pluralism.     

Investigating cognitive transfer within the framework of music practice: genetic pleiotropy rather than causality

The idea of far transfer effects in the cognitive sciences has received much attention in recent years. One domain where far transfer effects have frequently been reported is music education, with the prevailing idea that music practice entails an increase in cognitive ability (IQ). While cross‐sectional studies consistently find significant associations between music practice and IQ, randomized controlled trials, however, report mixed results. An alternative to the hypothesis of cognitive transfer effects is that some underlying factors, such as shared genes, influence practice behaviour and IQ causing associations on the phenotypic level. Here we explored the hypothesis of far transfer within the framework of music practice. A co‐twin control design combined with classical twin‐modelling based on a sample of more than 10,500 twins was used to explore causal associations between music practice and IQ as well as underlying genetic and environmental influences. As expected, phenotypic associations were moderate (r = 0.11 and r = 0.10 for males and females, respectively). However, the relationship disappeared when controlling for genetic and shared environmental influences using the co‐twin control method, indicating that a highly practiced twin did not have higher IQ than the untrained co‐twin. In line with that finding, the relationship between practice and IQ was mostly due to shared genetic influences. Findings strongly suggest that associations between music practice and IQ in the general population are non‐causal in nature. The implications of the present findings for research on plasticity, modularity, and transfer are discussed.     

Behavioral Genetics, Health, and Aging

A recurring observation from studies of health in the elderly is the pervasiveness of individual differences. For many health-related endpoints, total variation appears to increase across age group; however, few longitudinal studies have reported whether these age differences reflect true age-related changes. There are a growing number of twin studies of aging that provide some insight, at least cross-sectionally, into the nature of individual differences in health. Increases in total variance most often reflect increases in environmental sources of variance. Covariation among traits reflects both genetic and environmental mediation, dependent on the sex of the sample and the measures of interest. Co-twin control approaches have been successful in exploring the role of environmental influences as risk factors for poor health. The most serious limitation to these studies is the lack of longitudinal information to disentangle survival and selection effects from aging.     

Recent trends in cultural theories

Multiculturalism is probably the most important and most misunderstood psychological construct of this decade. This article identifies specific and uniquely valuable contributions of a multicultural perspective and demonstrates the importance of multicultural awareness training as a primary prevention strategy, directed toward preventing multicultural misunderstandings before they happen by training mental health providers to become more aware of their culturally learned assumptions and the contrasting cultural contexts of their clients. The development of recent multicultural theories will be reviewed to demonstrate how the definition of cultural theories have changed over time toward a broader and more complicated perspective. Finally practical applications of culture-centered theories will be reviewed through the presentation of a Cultural Grid for separating behaviors from expectations in each cultural context.     

Does Cooperation in the Laboratory Reflect the Operation of a Broad Trait?

The Dictator Game, a face valid measure of altruism, and the Trust Game, a face valid measure of trust and trustworthiness, are among the most widely used behavioural measures in human cooperation research. Researchers have observed considerable covariation among these and other economic games, leading them to assert that there exists a general human propensity to cooperate that varies in strength across individuals and manifests itself across a variety of social settings. To formalize this hypothesis, we created an S‐1 bifactor model using 276 participants' Dictator Game and Trust Game decisions. The general factor had significant, moderate associations with self‐reported and peer‐reported altruism, trust, and trustworthiness. Thus, the positive covariation among economic games is not reducible to the games' shared situational features. Two hundred participants returned for a second session. The general factor based on Dictator Game and Trust Game decisions from this session did not significantly predict self‐reported and peer‐reported cooperation, suggesting that experience with economic games causes them to measure different traits from those that are reflected in self‐assessments and peer‐assessments of cooperativeness. © 2018 European Association of Personality Psychology