Cross‐sectional study on the relationship between music training and working memory in adults

Learning to play musical instruments has been shown to enhance a wide variety of cognitive domains. The present study investigated the specific aspects of working memory (WM) that differed between adult musicians and non‐musicians. Twenty‐four musicians and 30 non‐musicians matched for age, gender, years of formal education, and verbal intelligence performed several WM tasks. A multivariate analysis of covariance, wherein family income was controlled, revealed that musicians outperformed non‐musicians in tasks related to visual–motor coordination, visual scanning ability, visual processing speed, and spatial memory. However, no significant differences were found in phonological and visual memory capacity. This study supports the view that music training is associated to specific (and not general) WM skills.     

Frontal deficits differentiate progressive supranuclear palsy from Parkinson's disease

The clinical differentiation of progressive supranuclear palsy from Parkinson's disease can be challenging, due to overlapping clinical features and a lack of diagnostic markers. Abnormalities in cognitive function form part of the clinical spectrums of these diseases and distinctive cognitive profiles may be helpful in differentiating these diseases in the diagnostic period. A comprehensive neuropsychological test battery was administered to 12 patients with clinically diagnosed progressive supranuclear palsy and 12 patients with Parkinson's disease matched for age and disease duration. Effect size (Cohen's d) was calculated for cognitive tests that were significantly different between groups. Patients with progressive supranuclear palsy performed significantly worse than those with Parkinson's disease on measures of processing speed, verbal fluency, planning, verbal abstract reasoning, verbal memory, and made more perseverative responses on a set shifting task. Measures of executive function, manual dexterity and processing speed were most diagnostically useful (Cohen's d > 2.0) in differentiating between progressive supranuclear palsy and Parkinson's disease. These findings suggest that more severe and prominent ‘frontal’ cognitive deficits in patients with progressive parkinsonism would be helpful in predicting progressive supranuclear palsy rather than Parkinson's disease and these findings may contribute to the development of diagnostic criteria.     

Individual Differences in Early Executive Functions: A Longitudinal Study from 12 to 36 Months

It has been proposed that executive functions develop in a hierarchical fashion, such that early, simple abilities seen already during the first year of life become increasingly coordinated with development, thereby enabling the emergence of more complex abilities. Although this hierarchical model has received support from empirical studies comparing executive function task performance across age groups, necessary support from longitudinal studies taking an individual differences perspective on development is missing. In addition, the model stresses the importance of attention in executive function development, but we do not know in what way attention contributes to the continued development once the earliest forms of simple functions have emerged. Using a longitudinal design, the present study investigated the relations between individual differences in simpler forms of executive functions as well as sustained attention at age 12 months and more complex executive functions at 24 and 36 months. The results indicated partial support for the hierarchical model, with infant inhibition being predictive of working memory in toddlerhood. In addition, at 12 months, sustained attention contributed to the development of toddler executive functions via the simple executive functions. This suggests that by this age, sustained attention has become an integrated part of early, simple executive functions. Copyright © 2015 John Wiley & Sons, Ltd.     

Interacting effects of age and time of day on verbal fluency performance and intraindividual variability

We explored the effects of age and time of day (TOD) on verbal fluency ability with respect to performance level and intraindividual variability (IIV). Verbal fluency, which involves complex cognitive operations, was examined in 20 older (mean age = 72.8 years) and 20 younger (mean age = 24.2 years) adults with test start time alternating between morning and evening across four days. Older adults generated more words in the morning and younger adults more in the evening, corresponding with self-report peak TOD. Age by TOD interactions were also observed across fluency tasks on the number of switches among subcategory exemplars during word generation and on the IIV observed in switching behavior. Older adults exhibited greater variability in switching in the evening than in the morning, whereas younger adults showed the opposite pattern. These findings demonstrate that processes involving energization (initiating and sustaining) and attentional control may be particularly sensitive to age differences in TOD influences on cognition.     

The interactive effects of age,education, and BMI on cognitive functioning

We examined the moderating effects of age and cognitive reserve on the relationship between body mass index (BMI) and processing speed, executive function, and working memory based on the literature suggesting that obese individuals perform more poorly on measures of these abilities. Fifty-six healthy, dementia-free community-dwelling older (mean age 65.72 ± 7.40) and younger (mean age 21.10 ± 2.33) adults completed a neuropsychological battery and reported height and weight. Mixed effects models were used to evaluate the interactive effects of age, education (a proxy for cognitive reserve), and BMI on cognitive scores. Higher education was protective for executive deficits in younger, but not older adults. Age differences in executive functions were reduced at higher education levels but increased in individuals with higher BMI. Results suggest the inter-relationships between cognitive reserve – as measured by education – and BMI differ across age, and that obesity may accelerate the cognitive aging process.     

How older adults use cognition in sentence-final word recognition

This study examined the effects of executive control and working memory on older adults’ sentence-final word recognition. The question we addressed was the importance of executive functions to this process and how it is modulated by the predictability of the speech material. To this end, we tested 173 neurologically intact adult native English speakers aged 55–84 years. Participants were given a sentence-final word recognition test in which sentential context was manipulated and sentences were presented in different levels of babble, and multiple tests of executive functioning assessing inhibition, shifting, and efficient access to long-term memory, as well as working memory. Using a generalized linear mixed model, we found that better inhibition was associated with higher accuracy in word recognition, while increased age and greater hearing loss were associated with poorer performance. Findings are discussed in the framework of semantic control and are interpreted as supporting a theoretical view of executive control which emphasizes functional diversity among executive components.     

A Systematic Framework for Integrating Psychological Evaluations and Interventions

A systematic framework for an integrative approach to psychological evaluations and interventions is proposed based on the executive system model of intelligence, the transactional processes of stress and coping, and the field properties of the personal domain. The executive system of intelligence is a comprehensive model that helps to explain the active components of various types of psychotherapies. We are proposing that psychotherapies facilitate clients' uses of their executive functions to develop coping strategies in their transactions with the environment and the events in their life space. A clinical case is presented to illustrate our systematic approach to psychological evaluation and intervention.     

体感游戏促进儿童的执行功能：运动强度和认知参与的作用

为了考察体感游戏促进儿童执行功能的作用机制, 采用2(运动强度：高/低) × 2(认知参与：高/低) × 3(测量时间：前测、一次性训练后测、长期训练后测)的三因素混合实验设计, 对122名4~6岁儿童进行6周(每周3次)的体感游戏训练。结果发现：在一次性训练中, 体感游戏中的运动强度而不是认知参与显著促进儿童执行功能, 尤其是工作记忆; 在长期干预中, 体感游戏中的运动强度和认知参与都显著促进儿童执行功能, 且认知参与的作用大于运动强度。这一结果不但验证了体感游戏对儿童执行功能的益处, 并且阐明了体感游戏中的哪些特征能对儿童执行功能具有短期的和长期的效果。     

留守学前儿童接受性语言能力与社会退缩的关系:有调节的中介模型

为探讨留守学前儿童接受性语言能力与社会退缩的关系及其内部机制,采用教师评定问卷和测量法对484名留守学前儿童进行调查。结果表明：（1）接受性语言能力不仅对社会退缩具有显著负向预测作用,也能通过执行功能的中介作用负向预测社会退缩;（2）执行功能的中介作用受到师幼关系的调节,相对于高师幼关系水平的个体,间接效应在低师幼关系水平的个体中更为显著,具体而言,师幼关系调节了中介的后半路径;（3）此外,在高师幼关系水平的个体中,执行功能对社会退缩的负向预测作用以及执行功能在接受性语言能力与社会退缩之间的中介作用都不显著。研究结果有助于揭示接受性语言能力对社会退缩的影响及其内在作用机制,对留守学前儿童社会退缩的预防及干预具有一定的启示意义。