The role of context in preschool learning: a multilevel examination of the contribution of context-specific problem behaviors and classroom process quality to low-income children's approaches to learning

Research suggests that promoting adaptive approaches to learning early in childhood may help close the gap between advantaged and disadvantaged children. Recent research has identified specific child-level and classroom-level variables that are significantly associated with preschoolers' approaches to learning. However, further research is needed to understand the interactive effects of these variables and determine whether classroom-level variables buffer the detrimental effects of child-level risk variables. Using a largely urban and minority sample (N = 275) of preschool children, the present study examined the additive and interactive effects of children's context-specific problem behaviors and classroom process quality dimensions on children's approaches to learning. Teachers rated children's problem behavior and approaches to learning and independent assessors conducted classroom observations to assess process quality. Problem behaviors in structured learning situations and in peer and teacher interactions were found to negatively predict variance in approaches to learning. Classroom process quality domains did not independently predict variance in approaches to learning. Nonetheless, classroom process quality played an important role in these associations; high emotional support buffered the detrimental effects of problem behavior, whereas high instructional support exacerbated them. The findings of this study have important implications for classroom practices aimed at helping children who exhibit problem behaviors.     

The role of intelligence and feedback in children’s strategy competence

A test-intervention-test study was conducted investigating the role of intelligence on four parameters of strategy competence in the context of a numerosity judgment task. Moreover, the effectiveness of two feedback types on these four parameters was tested. In the two test sessions, the choice/no-choice method was used to assess the strategy repertoire, frequency, efficiency, and adaptivity of a group of low-, average-, and high-intelligence children. During the intervention, half of the participants from each intelligence group were given outcome feedback (OFB), whereas the other half received strategy feedback (SFB). The pretest data showed large differences among the three intelligence groups on all four strategy parameters. These differences had disappeared at the posttest due to a particularly strong improvement on all strategy parameters in the low-intelligence group. Furthermore, it was found that SFB was more beneficial than OFB for all parameters involving strategy selection. These results indicate that intelligence plays an important role in children’s strategy use and suggest that strategy feedback can be a powerful instructional tool, especially for low-intelligence children.     

An Experimental Analysis of Mathematics Instructional Components: Examining the Effects of Student-Selected Versus Empirically-Selected Interventions

Within the context of an experimental analysis, the current study examined the effects of student- and empirically-selected interventions on the mathematics computational fluency of three elementary-aged students. For all of the participants, the empirically-selected intervention resulted in higher levels of computational fluency then the student-selected intervention. These results suggest that empirically-selected interventions may enhance the mathematics computational fluency of students experiencing mathematics problems. However, individual responsiveness to empirically-selected interventions suggests the importance of conducting brief experimental analyses to determine the most efficacious intervention. The implication of these results for intervention selection and incorporating choice-making opportunities into academic interventions are discussed.     

On the role of language in social choice theory

Axiomatic characterization results in social choice theory are usually compared either regarding the normative plausibility or regarding the logical strength of the axioms involved. Here, instead, we propose to compare axiomatizations according to the language used for expressing the axioms. In order to carry out such a comparison, we suggest a formalist approach to axiomatization results which uses a restricted formal logical language to express axioms. Axiomatic characterization results in social choice theory then turn into definability results of formal logic. The advantages of this approach include the possibility of non-axiomatizability results, a distinction between absolute and relative axiomatizations, and the possibility to ask how rich a language needs to be to express certain axioms. We argue for formal minimalism, i.e., for favoring axiomatizations in the weakest language possible.     

Speed behaviour as a choice between observing and exceeding the speed limit

Despite speed behaviour being defined as a choice between several possible speeds, studies using theory of reasoned action or theory of planned behaviour to predict and understand speed behaviour have focused on exceeding and not on observing the speed limit. This study examines whether the evaluation of exceeding but also of observing the speed limit contributes to improving predictions of self-reported speed behaviour and determining intentions to produce each of these two behavioural options. For a specific driving situation (straight road with 90 km/h speed limit), 238 young male drivers reported the speed at which they would drive at and where asked to assess the theory of planned behaviour key constructs with respect to observing and exceeding the speed limit by at least 20 km/h. Results showed that the amount of explained variance of self-reported speed behaviour, as well as intentions to observe and to exceed the speed limit by at least 20 km/h, increased significantly when the evaluations of the two options were introduced in the same stepwise regression analysis. Theoretical and practical implications of the results are discussed.     

Family Emotional Climate and Sibling Relationship Quality: Influences on Behavioral Problems and Adaptation in Preschool-Aged Children

We examined the impact of family emotional climate and sibling relationship quality on behavioral problems and adaptation in preschool-aged children. Participants were 63 mothers with a preschool-aged child enrolled in a Southern Arizona Head Start Program. Siblings were identified as children closest in age to target child. Mothers of predominantly Mexican descent (95%) participated in home interviews during the Fall and Spring of the year children entered center-based programs. Sibling relationship quality (warmth, agonism/competition) was proposed to predict children’s adjustment (behavioral problems and adaptation) longitudinally. Results indicate that after controlling for child characteristics (temperament, child gender, birth order) and after accounting for family characteristics (family emotional expressiveness, child exposure to interparental conflict, and parental agreement on childrearing), sibling warmth made a significant and unique contribution to child adjustment as reported by mothers and teachers six months later. Findings are consistent with existing research indicating that sibling relationships impact children’s adjustment and shape young children’s lives in meaningful and marked ways. Moreover, these associations were found with an understudied sample of young children of predominantly Mexican descent in low-income families, and thus make an important contribution to knowledge in the field.     

The Impact of Demographic Characteristics on Health-related Quality of Life Profile of Malaysian Epilepsy Population

The possibilities of adverse drug reactions and disease-related psychosocial implications have led to the current emphasis on health-related quality of life (HRQoL) assessment in epilepsy. The main objective of this study was to determine the impact of various demographic characteristics i.e. gender, age, marital status, ethnic origin, religion, and employment status on HRQoL profiles in Malaysian epilepsy patients. Patients with epilepsy were recruited from ten public hospitals in Sabah, Malaysia. Upon written consents, they completed the Malay Quality of Life In Epilepsy-30 (QOLIE-30) instrument which assesses Seizure Worry, Overall QoL, Emotional Well-Being, Energy/Fatigue, Cognitive Functioning, Medication Effects and Social Functioning. An Overall Score was generated to represent a summarised HRQoL score. Univariate and multiple linear regression analyses were both carried out using SPSS 14 for (1) all patients and (2) patients possessing Poor QoL (Overall Score < median) and Good QoL (Overall Score ≥ median). One-hundred-and-thirteen patients participated in the study. The respondents ranged from 18–76 years with a mean age of 31 years. Majority were Kadazandusuns (n = 46; 40.7%) and many were unmarried (n = 68; 60.2%), Muslims (n = 50; 44.2%) and unemployed (n = 54; 47.8%). Age was the most significant factor across all patients (B = −0.372, t = −2.238, p = 0.027), regardless of Poor or Good QoL level. Older patients (>56 years) fared the worst in many HRQoL areas. Those with Poor QoL were mostly affected by marital status (widowed/divorced) and ethnic origin (Kadazandusun/Chinese). Religion (Buddhism/Hinduism) emerged as the most prominent HRQoL predictor for patients experiencing Good QoL and being Chinese too played a role. These outcomes indicate that specific demographic characteristics are influential in determining the HRQoL of epilepsy patients. Consequently, healthcare professionals could utilise such information in planning the best treatment and care by considering both the medical and psychosocial impacts towards patients. This paper was part of a research project and majority of its components had been presented at the 7th Conference On International Society For Quality Of Life Studies (ISQoLS) 2006, Rhodes University, Grahamstown, South Africa, 17–20 July 2006.     

Ambiguous comparative judgment: Fuzzy set model and data analysis

Abstract:  This paper proposed two types of fuzzy set models for ambiguous comparative judgments, which did not always hold transitivity and comparability properties. The first type of model was a fuzzy theoretical extension of the additive difference model for preference that was used to explain ambiguous preference strength. The second was a fuzzy logic model for explaining ambiguous preference in which preference strength was bounded, such as a probability measure. In both models, multi-attribute weighting parameters and all attribute values were assumed to be asymmetric fuzzy L-R numbers. For each model, a method of parameter estimation using fuzzy regression analysis was proposed. Numerical examples were also provided for comparison. Finally, the theoretical and practical implications of the proposed models were discussed.     

SF-36量表用于慢性乙型肝炎生命质量测定的效果评价

评价SF-36量表在慢性乙型肝炎患者中应用的效果;调查101名慢性乙肝患者,用重测信度、分半信度、内部一致性、结构效度和判别效度等对SF-36量表进行评判;该量表具有良好的分半信度和内部一致性,结构效度和判别效度较好;SF-36量表可用于慢性乙型肝炎患者生命质量评价。     

中医科学性论析

因为科学研究的对象是自然现象及其规律,而这一自然现象及其规律又是客观同一的,所以科学才是世界通约通用的。也正由于此,世界上可以有不同的文学、艺术、伦理、政治、哲学、宗教等等,就是不能有不同的科学。然而,中医确实带有鲜明的特殊性,至今也难以为世界所共同理解。那么中医是不是科学?又应怎样认识、理解和对待中医的科学性呢?