Effects of acute endurance,strength, and coordination exercise interventions on attention in adolescents: A randomized controlled study

ObjectivesThe aim of this study was to compare three different modes of an acute bout of exercise – endurance, strength, and coordination – in their effects on adolescents' attention.DesignThis was a preregistered, prospective, randomized intervention study with four groups and two distinct measurement occasions.MethodEighty adolescent students aged 15–18 years were randomized to one of three exercise intervention groups (endurance, strength, coordination) or to a non-exercise, control group. The exercise interventions lasted for 25 min. The random assignment to the study groups was stratified according to participants' age and gender. Before and after the exercise intervention, all participants completed the revised d2-test of attention. A 4 × 2 repeated measures ANOVA with contrast-coded test was used as the main analysis method.ResultsAttentional test performance increased from before to after the exercise intervention for all exercise groups, as compared with the control group. The three exercise groups improved equally and did not differ in their attentional scores after the intervention.ConclusionsAn acute bout of exercise was in general beneficial for adolescent students' attention, while the mode of the provided exercise training was not decisive. School directors and teachers are encouraged to incorporate exercise-related breaks into their school plan.     

Experiences with social support among older adult women participating in gay square dancing

LGBTQI2S+ (lesbian, gay, bisexual, transgender, questioning, intersex, and two-spirit, etc.) individuals face unique challenges to physical activity participation, such as discrimination and exclusion. Square dance is a form of collaborative group dancing and while traditionally a heteronormative form of dance, gay square dance is typically open to everyone, regardless of sexual orientation. Square dancing offers opportunities to belong to a community of others engaged in the same activity, which older adults often find satisfying. The aim of this research was to understand how older adults who identify as women experience social support in the context of participating in gay square dance and the role previous experiences of social exclusion play in influencing these experiences. Fourteen self-identified women (age range 55–79 years; n = 11 White, n = 1 Black, n = 2 Jewish) belonging to a gay square dance club participated. Participants self-identified as heterosexual (n = 7), lesbian (n = 3), pansexual (n = 1), bisexual (n = 1), or did not identify with existing terminology (n = 2). Interviews were conducted during a gay square-dancing festival and thematically analyzed. Findings highlighted that participants experienced acceptance which affirmed their sense of self and enabled their authentic selves. To foster a sense of belonging and close relationships, specific actions (e.g., demonstrative welcoming of newcomers, mutual support) were taken by other participants in the group. Physical touch is an inherent part of square dancing, which took on different meanings for participants and was overall perceived as safe. Inclusive groups like gay square dance clubs are an important and consistent means where older adult women can experience meaningful social relationships and interactions.     

Structural connectivity between the hippocampus and cortical/subcortical area relates to cognitive impairment in schizophrenia but not in mood disorders

Cognitive impairment in schizophrenia and other psychiatric disorders is a challenge to be overcome in order to maintain patients' quality of life and social function. The neurological pathogenesis of cognitive impairment requires further elucidation. In general, the hippocampus interacts between the cortical and subcortical areas for information processing and consolidation and has an important role in memory. We examined the relationship between structural connectivity of the hippocampus and cortical/subcortical areas and cognitive impairment in schizophrenia, major depressive disorder and bipolar disorder. Subjects comprised 21 healthy controls, 19 patients with schizophrenia, 20 patients with bipolar disorder and 18 patients with major depressive disorder. Diffusion-weighted tensor images data were processed using ProbtrackX2 to calculate the structural connectivity between the hippocampus and cortical/subcortical areas. Cognitive function was assessed using the Brief Assessment of Cognition in schizophrenia composite score. Hippocampal structural connectivity index was significantly correlated with composite score in the schizophrenia group but not in the healthy control, major depressive disorder or bipolar disorder groups. There were no statistically significant differences in hippocampal structural connectivity index between the four groups. Structural connectivity between the hippocampus and cortical/subcortical areas is suggested to be a pathophysiological mechanism of comprehensive cognitive impairment in schizophrenia.     

BELIEF VS. COMMITMENT, VALIDITY VS. VALUE: A RESPONSE TO WARD GOODENOUGH

Abstract. This paper is on Ward Goodenough's recent article (27: 3), suggesting that his points can be clarified by reiterating the distinction between the realms of meaning and relevance. Religion's "truth" is in the form of its ualue; the "proof" which it requires is uindication; and the resulting "faith" must be understood as commitment.     

比较研究-影响中美儿童计算能力差异的认知因素

本研究要确定中美儿童基本计算技能的差异是否与他们使用的解题策略和基本加工过程的速度有关。为此,对中美两国的一年级儿童进行了书面计算能力测验,以及一组计算机呈现的加法作业。中国儿童在计算能力测验上表现出3:1的操作优势。中美儿童使用的解题策略种类一样,但是,中国儿童在策略综合运用的发展程度上超过美国儿童,检索策略的加工速度也超过美国儿童。显然,策略运用和加工速度的差异促成了中国儿童在计算能力测验上的优势.     

A demonstration of gaze following in 3- to 6-month-olds

An adult, with a puppet held at shoulder height on either side (within the infant's visual field), interacted with 3- to-6-month-olds, turning her head intermittently to talk to a puppet. Seventy- three percent of infants' first eye-turns were in the direction of the adult head-turn.     

不确定性问题解决策略研究及存在的问题分析

通过对不确定性问题解决及认知策略方面颇有代表性的研究的回顾、分析了该领域的研究特点、现状及存在的问题。     

小学儿童合取概念的形成及其与元认知的关系

采用个别访谈与问卷相结合的方法．研究了小学四、五、六年级共48名儿童合取概念的形成及其元认知的发展。结果表明．小学儿童形成合取概念的能力发展既具有渐进性,又有不均衡性;其元认知知识水平和元认知监控能力的发展均呈现出稳中有变的趋势;各年级的元认知能力与形成合取概念的步数之间均存在非常显著的相关。     

儿童运动视觉表象操作水平的发展及影响因素

采用计算机软件控制实验,以暴露运动一段行程后进入遮蔽的光点为刺激物,光点以三种不同运动速度、三种不同运动行距组合呈现,要求儿童判断光点到达目标位置时按键反应。结果表明：5—19岁儿童运动视觉表象操作水平的发展存在5一8岁、11—14岁两个加速期;客体运动速度对运动视觉表象操作绩效有显著影响,5、8、11岁组快速较中速下．5．8岁组中速较慢速下操作准确性均有显著降低;客体运动行距对运动视觉表象操作绩效也有显著的影响．5、8、11岁组右目标位置下较中目标位置下操作准确性显著降低;性别对运动视觉表象操作水平无显著影响。