Do infants need social cognition to act socially? An alternative look at infant pointing     

D'Entremont B  Seamans E 《Child development》2007,78(3):723-728

Tomasello, Carpenter, and Liszkowski (2007) present a comprehensive review of the infant pointing literature. They conclude that infant pointing demonstrates communicative intent from its onset, at about 1 year of age. In this commentary, it is noted that for infants to understand communicative intent, they must have a concept of self and others as intentional agents. Evidence is reviewed to argue that this is not possible until 18-24 months of age. A leaner explanation of how infants might initially succeed in pointing tasks without understanding communicative intent is considered.  相似文献   

Cumulative stress and substantiated maltreatment: the importance of caregiver vulnerability and adult partner violence   总被引：1，自引：0，他引：1  

Wekerle C  Wall AM  Leung E  Trocmé N 《Child abuse & neglect》2007,31(4):427-443

OBJECTIVE: Our goal is to assess the effect of caregiver vulnerabilities, singly and in combination, on the substantiation of child abuse (physical, sexual) and neglect, while controlling for relevant background variables. We test the moderator role of adult partner violence in qualifying the relationship between caregiver vulnerabilities and maltreatment substantiation. METHOD: Secondary analyses of the 1998 Canadian Incidence Study of Reported Child Maltreatment (CIS) are used to predict child protective service investigation substantiation versus non-substantiation from a range of caregiver vulnerability factors. Involvement in partner violence was examined as a moderator in the relation between caregiver vulnerabilities and maltreatment substantiation. The CIS is an epidemiological survey of first-reported cases to child protective services, using a random sample of child welfare agencies across Canada. Child welfare workers completed a research form on the child, primary caregiver, family, perpetrator, severity and type of maltreatment, as well as services and court outcomes. All maltreatment classifications were assigned according to the Canadian legal definition of child abuse and neglect. Hierarchical logistic regression analyses were used, with stepped entry of: (1) demographic factors, socioeconomic disadvantage, and caregiver's own history of maltreatment; (2) caregiver vulnerability factors; (3) involvement in partner violence; (4) the interaction between caregiver vulnerability and partner violence. RESULTS: Caregiver substance abuse was found to be the single most potent kind of caregiver vulnerability in predicting maltreatment substantiation. When the total number of vulnerabilities was used as the predictor, prediction across all types of maltreatment increased, especially for substantiated neglect. Analyses also showed that the presence of partner violence in the home exacerbated the effect of caregiver vulnerability on substantiation. CONCLUSIONS: The total number of caregiver vulnerabilities was the best predictor of the substantiation of child abuse and neglect. This relationship was moderated by the existence of partner violence: high caregiver vulnerability and high partner violence increased the likelihood of substantiation versus non-substantiation. These results suggest that caregiver issues should be considered in tandem with partner relationships. Among child welfare cases, caregiver vulnerability and partner violence are critical targets for child maltreatment prevention and early child protective services intervention.  相似文献   

Predictors of psychological distress and positive resources among Palestinian adolescents: trauma, child, and mothering characteristics   总被引：1，自引：0，他引：1  

Qouta S  Punamäki RL  Montgomery E  El Sarraj E 《Child abuse & neglect》2007,31(7):699-717

OBJECTIVE: The aim was to examine how traumatic and stressful events, responses to violence, child characteristics, and mothering quality, as measured in middle childhood predict psychological distress and positive resources in adolescence. METHOD: The participants were 65 Palestinian adolescents (17+/-.85 years; 52% girls), who had been studied during the First Intifada (T1), during the Palestinian Authority rule (T2) and before the Second Al Aqsa Intifada (T3) in Gaza. Psychological distress was indicated by PTSD, and depressive symptoms and positive resources by resilient attitudes and satisfaction with quality of life, all measured at T3. The predictors that were measured at T1 were exposure to military violence, active coping with violence and children's intelligence, cognitive capacity, and neuroticism. Mothering quality and stressful life-events were measured at T2, the former reported by both the mother and the child, and the latter by the mother. RESULTS: Adolescents' PTSD symptoms were most likely if they had been exposed to high levels of traumatic and stressful experiences and had poor cognitive capacity and high neuroticism in middle childhood. Only high levels of childhood military violence and stressful life-events predicted high depressive symptoms and low satisfaction with quality of life in adolescence. CONCLUSIONS: Military violence in childhood forms risks for both increased psychological distress and decreased positive resources. However, child characteristics such as cognitive capacity and personality are important determinants of psychological vulnerability in military trauma.  相似文献   

六颗纽扣     

德尔·柯若思·珀维斯  珍妮佛·E．莫瑞斯绘画 《顽皮娃娃》2011,(32):24-25

我的衣服上有六颗纽扣。 两颗在我的口袋上, 两颗在我的衣领上, 两颗在我的衣襟上, 包裹着我的身体, 抵御冬天的寒风!  相似文献   

美国优质网络课程的案例介绍   总被引：1，自引：0，他引：1  

李艳  Kim E.Dooley  James R.Lindner 《远程教育杂志》2011,29(1):90-95

近十年来,我国高校网络课程建设成果显著,但其中暴露出的理论与实践相脱离的现象也比较严重。通过介绍美国德克萨斯A&M大学Dooley教授开设的网络课程《远程教育的高级方法》,尝试剖析其作为优质网络课程在管理平台、教学设计、交互安排、评价方法以及支持服务等方面所具有的特征,以期与国内远程教育的研究者和实践者分享经验。  相似文献   

Meeting guidelines for physical activity,muscle strength,and sleep lowers mortality risk:Commentary on: "Associations between aerobic and musclestrengthening physical activity,sleep duration,and risk of all-cause mortality:A prospective cohort study of 282     

Barbara E.Ainsworth 《运动与健康科学(英文)》2023,(1):3-4

<正>In 2022, Duncan et al.¹ published results from an investigation of the combined effects of moderate-to-vigorous aerobic exercise(AER), muscle-strengthening activities(MSA), and sleep durations on the risks for all-cause mortality in 282,473 U.S. adults aged 18—84 years.  相似文献   

深度信念以及信念和信仰的相对作用     

乔治·E·德福 《华中科技大学学报(社会科学版)》2007,21(3):17-22

“深度信念”是怀特海文稿中的关键概念。在怀特海有机哲学看来,动机、方法和意义是一个整体。他懂得要在深层次上探查人类追求意义及理解的倾向,进而揭示“追求”行为中的创造张力。深度信念就是这种深层次的动力。深度信念不同于各种各样起源于文化传统的信仰或偶发的信念,它不像后者那样可能失去。怀特海认为,在个人经验中,某一个信念的失去更可能是“无限性激励下的有限性”,是某种“超越的内在性”,“朝向更精美细致的结果”。深度信念促成了精神的冒险,是人类固化成就中不可抹去的最富锐气的因素,是人的呈现。  相似文献   

Authoritarianism, perceived threat and exclusionism on the eve of the Disengagement: Evidence from Gaza   总被引：1，自引：0，他引：1  

Canetti D  Halperin E  Hobfoll SE  Shapira O  Hirsch-Hoefler S 《Int J Intercult Relat》2009,33(6):463-474

Major political events such as terrorist attacks and forced relocation of citizens may have an immediate effect on attitudes towards ethnic minorities associated with these events. The psychological process that leads to political exclusionism of minority groups was examined using a field study among Israeli settlers in Gaza days prior to the Disengagement Plan adopted by the Israeli government on June 6, 2004 and enacted in August 2005. Lending credence to integrated threat theory and to theory on authoritarianism, our analyses show that the positive effect of religiosity on political exclusionism results from the two-staged mediation of authoritarianism and perceived threat. We conclude that religiosity fosters authoritarianism, which in turn tends to move people towards exclusionism both directly and through the mediation of perceived threat.  相似文献   

The influence of game location and outcome on behaviour and mood states among professional rugby league players   总被引：2，自引：0，他引：2  

Polman R  Nicholls AR  Cohen J  Borkoles E 《Journal of sports sciences》2007,25(13):1491-1500

In this study, we examined the relationship between home and away matches on mood. In addition, the relationships between game location, game outcome, behavioural factors, and mood were investigated among 12 professional English rugby league players competing in the Super League. Participants completed daily diaries for 27 days. The diary consisted of six analogue scales measuring mood (relaxed-tense, energetic-weary, depressed-elated, tired-alert, anxious-calm, cheerful-miserable) as well as behavioural factors and self-rated performance. There were no significant differences in self-reported mood states leading up to home or away matches except for players feeling more tired when playing away. Significant relationships between mood and behaviours (e.g. sleep and eating) and subjective performance were observed. The outcome of the match was found to influence mood, with a defeat resulting in decreased mood. Our results show that game location did not influence mood and therefore does not provide an explanation for the home advantage.  相似文献   

Electrical and mechanical response of skeletal muscle to electrical stimulation after acute passive stretching in humans: a combined electromyographic and mechanomyographic approach     

Cè E  Paracchino E  Esposito F 《Journal of sports sciences》2008,26(14):1567-1577

Two mechanisms have been suggested to explain stretching-induced maximum force depression: a mechanical alteration in the stretched muscle and an impairment of neural activation. Electrical stimulation allows standardization of the level of muscle activation without being limited by neural control. The aim of this study was to evaluate the stretching-induced changes in the electrical and mechanical properties of muscle during electrically elicited contractions. Twelve participants (age 22 +/- 1 years; body mass 75 +/- 2 kg; stature 1.79 +/- 0.02 m; mean +/- standard error) underwent six electrical stimulations of the medial gastrocnemius muscle before and after stretching. During the contractions, surface electromyogram (EMG) and mechanomyogram (MMG) were recorded simultaneously together with force. After stretching we found: (i) no differences in EMG parameters; (ii) MMG amplitude decreased by 4 +/- 1% (P < 0.05); and (iii) the peak force, the peak rate of force development, and the acceleration peak of force development decreased by 12 +/- 3%, 14 +/- 1%, and 24 +/- 5%, respectively (P < 0.05). In conclusion, acute passive stretching did not change EMG properties but altered the mechanical characteristics of the contracting muscle. Indeed, muscle force-generating capacity and stiffness of the muscle-tendon unit were significantly impaired.  相似文献