抑郁症早醒对事件相关电位的关系研究

本研究旨在探讨抑郁症睡眠障碍早醒与事件相关电位P300的关系。 通过对22例抑郁症早醒病人、20例抑郁症非早醒病人及20例健康自愿者进行事件相关电位P300和汉密尔顿抑郁量表检测,结果发现,早醒组与对照组比较P2、N2、P3潜伏期与反应时间明显延长(P＜0.05),P2、N2、P3波幅明显降低;非早醒组与对照组比较N2、P3潜伏期与反应时间明显延长(P＜0.05),N2、P3波幅明显降低;早醒组与非早醒组比较P2、N2、P3潜伏期与反应时间明显延长(P＜0.05),N2、P3波幅明显降低。早醒组HAMD评分明显高于非早醒组(P＜0.05)。研究表明抑郁症早醒与非早醒病人均存在认知功能的损害,损害程度早醒病人比非早醒病人更为严重。     

Students' perceptions of characteristics associated with social success: Changes during early adolescence

Students' endorsement of different characteristics associated with social success (sincere, responsible, dominant, disingenuous behaviors, appearance/athletic characteristics) were examined at six-month intervals for four time points spanning the transition from elementary to middle school (N = 558; 53% girls, 47% boys; 56% African American, 44% European American). Students' perceptions of socially successful children as sincere and responsible declined over time, whereas students' perceptions of socially successful children as dominant, disingenuous, and attractive/athletic increased over time. However, sincere behavior remained a top-rated characteristic at all time points and dominant and disingenuous behavior remained at the bottom, indicating that although the developmental trends were concerning the overall picture was not bleak. At all time points, girls endorsed sincere behavior as more important, and dominant and disingenuous behaviors and appearance/athletic characteristics as less important, to social success than boys. African American girls perceived appearance/athletic characteristic as less important to social success than other students.     

Computational explorations of perceptual symbol systems theory

The aim of this paper is twofold. First, we provide a methodological pathway from theories of situated, embodied cognition to simulations with an eye to empirical evidence, and suggest a possible cross-fertilization between cognitive robotics and psychology. Psychological theories, in particular those formulated at an abstract level, include models which are often severely underspecified at the level of mechanisms. This is true in the synchronic, constructive perspective (how can the effects observed in experiments be concretely generated by the model's mechanisms?) and in the diachronic, developmental perspective (how can such mechanisms be learned and developed?). The synthetic method of artificial cognitive systems research, and in particular of cognitive robotics, can complement research in psychology (and neurosciences) by exploring the constructive and developmental aspects of theories. Our second aim is to provide an example of such a methodology by describing simulations aiming at developing a perceptual symbol system (PSS) (Barsalou, 1999). We then describe the two main theoretical constructs of the PSS, perceptual symbols and simulators, illustrate their development in an artificial system, and test the system in prediction, categorization, and abstraction tasks.     

Prenatal depression effects on early development: A review

This review of recent research on prenatal depression suggests that it is a strong predictor of postpartum depression and is more common than postpartum depression. Prenatal depression has been associated with excessive activity and growth delays in the fetus as well as prematurity, low birthweight, disorganized sleep and less responsiveness to stimulation in the neonate. Infants of depressed mothers have difficult temperament, and later in development attentional, emotional and behavioral problems have been noted during childhood and adolescence, as well as chronic illnesses in adulthood. Several variables have confounded the effects of prenatal depression including comorbid anxiety and anger as well as stressful life events. Potential mediating variables are low prenatal maternal dopamine and serotonin levels and elevated cortisol and norepinephrine. The associated intrauterine artery resistance may limit blood flow, oxygen and nutrients to the fetus. Some studies also suggest the heritability of developmental problems for the children of prenatally depressed mothers, including ADHD and antisocial behavior. Multivariate, longitudinal research is needed to disentangle these confounding and mediating variables.     

Children and Politics: An Empirical Reassessment of Early Political Socialization

Demands for the inclusion of children, the youngest citizens, in democratic decision making are increasing. Although there is an abundance of empirical research on the political orientations of adolescents, there is a paucity of research on younger children's orientations. Our panel study of more than 700 children in their first year of primary school shows that these young children already exhibit consistent, structured political orientations. We examine the distribution and development of political knowledge, issue orientations, and notions of good citizenship. We find achievement differences between subgroups at the beginning of the school year, and these differences do not disappear. Children from ethnic minorities and lower socioeconomic residence areas show relatively less developed political orientations, and they do not improve as much over the school year as other children. Furthermore, normative political orientations and cognitive orientations differ in their development.     

Improving Responsiveness to Intervention for English-Language Learners: A Comparison of Instructional Pace on Letter Naming Rates

An alternating treatments design was used to compare the effects of a 1-s and a 5-s paced intervention on rates of letter naming by English Language Learners (ELL). Participants were four kindergarten students performing below the average letter naming level and learning rate than other ELL classmates. The fast paced intervention consisted of a 1-s paced letter modeling and 1-s response wait time combined with a 1-s intertrial interval. Alternatively, the slower paced intervention consisted of 5-s modeling, response wait time, and intertrial intervals. For three students, the 5-s paced intervention resulted in greater increases in letter naming rates as compared to the 1-s intervention and baseline condition. All students first obtained the mastery criterion level during the 5-s intervention.     

Observing home-visiting quality across time: A longitudinal reliability study of the Home Visit Rating Scales

Empirical examination of home-visiting quality over time is lacking in the research literature. To this end, this study examined the most recent edition of a widely used observational measure of home-visiting quality, the Home Visit Rating Scales (HOVRS), over four repeated assessments spanning an average of 6 months. Psychometric quality for the HOVRS Total and Home Visitor Practice Scales, including item ratings and calculated scores, across time was demonstrated. Stability indicators for the Family Engagement Scales varied, with superior reliability often indicated for individual ratings over the calculated score. The exploration of interrelationships among family demographics and change in HOVRS scores over time were largely insignificant. Interestingly, a decline in the Home Visitor Practice Scale significantly related to increased symptoms of maternal depression, possibly suggesting that home-visitors’ focus shifted from children's needs to those of parent s when mental health concerns were observed. Although this study is an examination of one program model and poses limited generalizability, it sets the stage for advancing the HOVRS and longitudinal measurement of home-visiting quality.     

Positive discipline,harsh physical discipline,physical discipline and psychological aggression in five Caribbean countries: Associations with preschoolers' early literacy skills

Physical punishment has received worldwide attention because of its negative impact on children's cognitive and social development and its implications for children's rights. Using UNICEF Multiple Indicator Cluster Surveys 4 and 5 data, we assessed the associations between positive discipline, harsh physical punishment, physical punishment and psychological aggression and preschoolers' literacy skills in 5628 preschool‐aged children and their caregivers in the developing nations of Belize, the Dominican Republic, Guyana, Jamaica and Suriname. Caregivers across countries used high levels of explanations and psychological aggression. There were significant country differences in the use of the four disciplinary practices. In the Dominican Republic and Guyana, physical punishment had negative associations with children's literacy skills, and in the Dominican Republic, positive discipline had a positive association with children's literacy skills. Findings are discussed with respect to the negative consequences of harsh disciplinary practices on preschoolers' early literacy skills in the developing world.     

Communicative development in Swedish children 16-28 months old: the Swedish early communicative development inventory--words and sentences

To describe the development of words and sentences in Swedish children 16-28 months old, 900 parental reports on 336 children were analyzed. Subjects were randomly selected from the national birth register, and there was a response rate of 88%. The assessments were made using the Swedish Early Communicative Development Inventory--words and sentences (SECDI--w&s). Age-based norms for productive vocabulary, pragmatic skills, grammar skills, and maximum length of utterance (MaxLU) were determined. We describe the development of feedback morphemes, semantic categories, and single words and tasks. Correlation across measures was significant, and especially strong between vocabulary size and grammar skills. Optimized positive predictive values were high for 25 to 28 month predictions (71%-88%), and vocabulary scores were found to be of particular predictive importance. No significant gender differences were detected. The clinical relevance of the instrument is discussed.     

A LONGITUDINAL,PERSON‐CENTERED ANALYSIS OF EARLY HEAD START MOTHERS’ PARENTING

This study used a person‐centered approach to examine stability and change in parenting typologies across early childhood. Profiles were associated within and across time with contextual covariates, including demographic characteristics, risk factors, and Early Head Start participation. Participants were drawn from the Early Head Start Research and Evaluation Project (N = 2, 876). Parenting profiles were identified based on observed parenting dimensions at 14, 24, and 36 months, and pre‐Kindergarten (pre‐K). Results suggested a four‐profile solution at each time point: Supportive, Lukewarm (14 & 24 months)/Sufficient (36 months and pre‐K), Harsh, and Detached. Supportive was the largest, most stable, and most likely transitioned into profile while Harsh and Detached represented rare profiles with moderate to low membership stability across time. Depression and family conflict emerged as important correlates of unsupportive parenting profiles both within and across time. Findings are discussed in terms of their relevance for both policy and implementation practices for low‐income mothers with young children.