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1.
In this article I describe and evaluate an alternative baseline model for comparative fit assessment of structural equation models and compare it to the standard “null” baseline model. The new “equal correlation” baseline model constrains all variables to have equal, rather than zero, correlations, whereas all variances are free. The new baseline model reflects the reality of atheoretical background correlation in nonex‐perimental data sets, and it improves the ability of comparative fit indices to distinguish between better and worse target models. It also helps to preserve the statistical link between these indices and the noncentral χ2 distribution. Also, computing the same comparative fit indices using different baseline models will provide more information about model fit than computing multiple comparative fit indices using the same baseline. I also point out some limitations of the proposed baseline model.  相似文献   

2.
A critical skill of childhood is learning social norms. We examine whether the generic pronouns “you” and “we,” which frame information as applying to people in general rather than to a specific individual, facilitate this process. In one pre-registered experiment conducted online between 2020 and 2021, children 4- to 9-year-old primarily living in the midwestern U.S. (N = 146, 75 girls, 71 boys, Mage = 7.14, SD = 1.69, 82% White) interpreted actions described with generic pronouns (vs. “I”) as normatively correct and selected the speaker who used generic pronouns as the rule-follower, particularly when generic pronouns were presented first. There were no significant effects of age. These results illustrate how generic pronouns influence how children discern unfamiliar norms and form interpersonal judgments.  相似文献   

3.
This study examined the prospective influence of adolescent working memory (WM) on changes in impulsivity and sexual risk taking and assessed whether this relation could be explained by confounding effects of parental influences. Data from 360 community adolescents (Mage = 13.5 ± 0.95 years; 52% female; 56% non‐Hispanic White; low‐mid socioeconomic status (SES); recruited from Philadelphia area in 2004–2005) were analyzed using structural equation modeling to predict changes in impulsivity and sexual risk taking over a 2‐year follow‐up, using baseline assessments of WM, parental monitoring, parental involvement, and SES. Stronger WM predicted reduced involvement in sexual risk taking at follow‐up, effects channeled through changes in impulsivity dimensions of “acting without thinking” and “inability to delay gratification.” Parental variables had a protective influence on adolescent impulsivity and risk involvement, but the effects of WM operated independently of parental influences.  相似文献   

4.
Despite an increase in the use of technology in undergraduate anatomy education, and the rising popularity of online anatomy courses at community colleges in the United States, there have been no reports on the efficacy of augmented reality on anatomy education in this population. The purpose of this study was to test the hypothesis that augmented reality is an effective and engaging tool for learning anatomy in community college students. Participants recruited from Cuyahoga Community College (Cleveland, OH) studied skull anatomy using either traditional tools (i.e., textbook and plastic skull model) or an augmented reality head-mounted display with an interactive virtual skull application. Comparison of knowledge before and following the study period revealed that augmented reality was an effective tool for learning skull anatomy: pre-quiz = 32.7% (± 25.2); mean (± SD), post-quiz = 61.8% (± 19.5); n = 15; t(28) = 3.53; P = 0.001. The traditional tools were equally effective: pre-quiz = 44.9 % (± 18.6), post-quiz = 67.9 % (± 17.3); n = 17; t(32) = 3.73; P = 0.0007. Students rated the augmented reality device as 9.6 (± 1.0); mean (± SD) when asked if it fit the statement “fun to use” on a semantic differential scale from 1 (poor) to 10 (excellent). In conclusion, this study found that augmented reality is an effective and engaging tool for the instruction of skull anatomy at a community college.  相似文献   

5.
This study explored heterogeneous developmental trajectories of academic achievement and their relations to trajectories of life satisfaction and trajectories of suicidal ideation among Chinese elementary school students. A sample of 547 students (55.0% boys; Mage = 9.00 years, SD = 0.76 at Time 1) completed a packet of measures on five occasions across two years, using 6-month intervals. Three distinct trajectories of academic achievement were identified: “high-stable” (86.28%), “low-increasing” (8.94%), and “low-decreasing” (4.78%). Girls demonstrated higher academic achievement than boys. Students displaying adverse developmental trends in academic achievement were more likely to show adverse trends in life satisfaction. Finally, trajectories of academic achievement and trajectories of suicidal ideation were related for girls, but not boys. Programs promoting academic achievement may require adaptations for the differing genders and start as early as elementary school.  相似文献   

6.
Children with negative competence beliefs often achieve below their potential in school. This randomized field experiment tested whether engaging in positive self-talk may benefit these children’s mathematics performance. Participants (N = 212, Grades 4–6, Mage = 10.6) worked on the first half of a standardized mathematics test, engaged in effort self-talk (“I will do my very best!”), ability self-talk (“I am very good at this!”), or no self-talk, and worked on the second half of the test. Compared to both the conditions, effort self-talk benefited the performance of children holding negative competence beliefs: It severed the association between negative competence beliefs and poor performance. By internally asserting that they will deliver effort, children with negative competence beliefs can optimize their achievement in school.  相似文献   

7.
Conventional null hypothesis testing (NHT) is a very important tool if the ultimate goal is to find a difference or to reject a model. However, the purpose of structural equation modeling (SEM) is to identify a model and use it to account for the relationship among substantive variables. With the setup of NHT, a nonsignificant test statistic does not necessarily imply that the model is correctly specified or the size of misspecification is properly controlled. To overcome this problem, this article proposes to replace NHT by equivalence testing, the goal of which is to endorse a model under a null hypothesis rather than to reject it. Differences and similarities between equivalence testing and NHT are discussed, and new “T-size” terminology is introduced to convey the goodness of the current model under equivalence testing. Adjusted cutoff values of root mean square error of approximation (RMSEA) and comparative fit index (CFI) corresponding to those conventionally used in the literature are obtained to facilitate the understanding of T-size RMSEA and CFI. The single most notable property of equivalence testing is that it allows a researcher to confidently claim that the size of misspecification in the current model is below the T-size RMSEA or CFI, which gives SEM a desirable property to be a scientific methodology. R code for conducting equivalence testing is provided in an appendix.  相似文献   

8.
Abstract

The Median Test was employed to test null hypotheses relevant to the perception of the college experience and variables related to academic motivation. Statistically significant differences were found for academic motivation variables, i.e., direction of aspirations, influence of precollege peer group, influence of the home, independence In planning, persistence, and self-control in terms of the type of “philosophy” of education endorsed by a random sample of 280 entering freshmen at a private midwestern university. The dominant perceptions, or “philosophies” endorsed were the “academic”, the “vocational”, or the “collegiate”. In general, on those academic motivation variables where statistically significant differences were obtained, the “collegiate” were lower while the “academics” were higher. The “vocational” tended not to depart from the grand population median value. Implications for student personnel workers in higher education are indicated and suggestions for further study are made.  相似文献   

9.
The use of sample covariance matrices constructed with pairwise deletion for data missing completely at random (SPW) is addressed in a simulation study based on 3 sample sizes (n = 200, 500, 1,000) and 5 levels of missing data (%miss = 0, 1, 10, 25, and 50). Parameter estimates were unbiased, parameter variability was largely explicable in terms of the number of nonmissing cases, and no sample covariance matrices were nonpositive definite except when %miss was 50 and the sample size was 200. However, nominal χ2 test statistics (and, thus, fit indices based on χ2s) were substantially biased by %miss and its interaction with N. Corrected χ2s based on the minimum, mean, and maximum number of nonmissing cases per measured variables and cases per covariance term (NPC) reduced but did not eliminate the bias. Empirically derived power functions did substantially better but may not generalize to other situations. Whereas the minimum NPC (the default in the SPSS version of LISREL) is probably better than most simple alternatives in many applications, the problem of how to assess fit for models fit to SPWS has no simple solution; caution is recommended, and there is need for further research with more suitable methods for this problem.  相似文献   

10.
This study explored whether a daytime nap aids children's acquisition of letter-sound knowledge, which is a fundamental component for learning to read. Thirty-two preschool children in Sydney, Australia (Mage = 4 years;3 months) were taught letter-sound mappings in two sessions: one followed by a nap and the other by a wakeful period. Learning was assessed by explicit letter-sound mappings (“Which sound does this letter make?”) and knowledge generalization tasks (“Here's Tav and Cav, which one is /kav/?”). Results from the knowledge generalization task showed better performance after a nap than after wake. However, no nap benefit was found for explicit letter-sound knowledge. This study provides initial evidence that naps could be beneficial for preschool children's learning of letter-sound mappings.  相似文献   

11.
The traditional core Masters in Business Administration (MBA) curriculum consists of a broad range of courses that can be considered as a whole, or divided into qualitative and quantitative courses. Regression models were developed with “QualGPA” and “QuantGPA” as response variables, and gender, pre‐MBA academic indicators, and personality factors (measured by the RightPath6® profile) as the explanatory variables. Results may provide pedagogical insight for faculty teaching increasingly diverse MBA classes. Additionally, there are recruitment implications for those hiring MBA graduates, as well as implications for MBA students in decisions regarding MBA concentrations and subsequent career choices. While gender alone was not a significant variable in any model, gender–personality interactions were significant. Across both course categories, performance tended to be higher for students who were more “Detached” than “Compassionate,” with the exception of females in quantitative courses. Additionally, “Extraversion” and “Reactiveness” significantly enhanced performance among males in qualitative courses, and “Conscientiousness” had a strong positive performance effect among females in quantitative courses.  相似文献   

12.
The standardized, indicated school‐based prevention program “Networks Against School Shootings” combines a threat assessment approach with a general model of prevention of emergency situations in schools through early intervention in student psychosocial crises and training teachers to recognize warning signs of targeted school violence. An evaluation study in 98 German schools with 3,473 school staff participants (Mage = 46.2 years) used a quasi‐experimental comparison group design with three measurement points (pre, post, and 7 months followup) with schools randomly allocated to implementation conditions. The study found increases in teachers' expertise and evaluation skills, enhanced abilities to identify students experiencing a psychosocial crisis, and positive secondary effects (e.g., teacher–student interaction, feelings of safety).  相似文献   

13.
Adopting a two-phase explanatory sequential mixed methods research design, the current study examined the impact of student teaching experiences on pre-service teachers’ readiness for technology integration. In phase-1 of quantitative investigation, 2-level growth curve models were fitted using online repeated measures survey data collected from 68 pre-service teachers doing their student teaching. The results revealed significant progress in readiness for technology integration during student teaching and significant variability in individual change trajectories of readiness for technology integration. Two dummy variables, prior-teaching (0 = “having no prior teaching experience”; 1 = “having prior teaching experience”) and grade-level (0 = “elementary level”; 1 = “secondary level”), were identified as significant in predicting the shape of individual change trajectories of readiness for technology integration. In phase-2 of qualitative investigation, follow-up interview data were collected from 11 pre-service teachers among those who participated in the online surveys. The interview data was analyzed both deductively and inductively yielding clues and insights for interpreting and understanding the quantitative results from phase-1. Based on its quantitative and qualitative results, this study made recommendations for future technology integration research and for improving pre-service teachers’ technology use experience during student teaching.  相似文献   

14.
This study seeks to extend previous research on family stress, parenting, and child adjustment to families with adopted Chinese children. In doing so, we also seek to strengthen inferences regarding the experiential underpinnings of previously obtained relationships among these variables by determining if they also occur in families where parents and children are not biologically related. Participants were families of 133 preschool-age adopted Chinese girls (Mage = 5.2 years, SD = 0.7; Mage at adoption = 12.8 months, SD = 4.1). Data on family stress, parenting styles, and children's behavioral adjustment were collected from the adoptive mothers with the Social Problem Questionnaire (SPQ), Parenting Styles and Dimensions Questionnaire (PSDQ), and Child Behavior Checklist (CBCL) respectively. Results showed that adoptive mothers reported relatively mild family stress, frequent authoritative parenting, and few behavior problems in their children. Nonetheless, family stress, authoritarian and permissive parenting styles positively correlated with children's behavioral problems. Finally, authoritarian parenting mediated the effect of non-child-related family stress (NCR-stress) on the adopted Chinese girls’ CBCL internalizing and overall problems, even after controlling for corresponding CBCL scores from 2 years earlier. Our results showed that the overall pattern of relationships found in non-adoptive families is also seen in families with adopted Chinese children.  相似文献   

15.
A robust literature documents the significance of gender in children's development, but gaps remain in understanding how developing gender identities link to gender inequalities. This article uses master narratives to analyze the ways that children's gender narratives reinforce or disrupt gender inequality. Semistructured interviews were conducted with 233 Black, White, mixed- and other-race minority children (7–12 years old; Mage = 9.92; 61% girls) in racially diverse schools in the Pacific Northwest. Four narrative types were identified: two “master narratives” that reinforced gender inequality and two “alternative narratives” that disrupted it. Analyses revealed that 5th/6th-graders (vs. 2nd–4th graders) and girls (vs. boys) were more likely to tell alternative narratives. The contributions of master narratives for understanding gender identity, development, and inequality are discussed.  相似文献   

16.
The size of a model has been shown to critically affect the goodness of approximation of the model fit statistic T to the asymptotic chi-square distribution in finite samples. It is not clear, however, whether this “model size effect” is a function of the number of manifest variables, the number of free parameters, or both. It is demonstrated by means of 2 Monte Carlo computer simulation studies that neither the number of free parameters to be estimated nor the model degrees of freedom systematically affect the T statistic when the number of manifest variables is held constant. Increasing the number of manifest variables, however, is associated with a severe bias. These results imply that model fit drastically depends on the size of the covariance matrix and that future studies involving goodness-of-fit statistics should always consider the number of manifest variables, but can safely neglect the influence of particular model specifications.  相似文献   

17.
The present 8‐year longitudinal study examined how multiple aspects of family relationships change across the transition from adolescence (Mage = 15 years) to young adulthood (Mage = 22 years) among 821 individuals. Results showed that there was more discontinuity than continuity in family relationships across this transition. Whereas a normative decline was evident in all measured aspects of family relationships during adolescence, this decline persisted for only a few dimensions of family relationships during young adulthood. Other aspects of family relationships stabilized or rebounded. There was little variation in these trajectories as a function of ethnicity or gender, suggesting that these changes in family relationships are generally normative. Results suggest that the transition to adulthood is a period of significant transformation in family relationships.  相似文献   

18.
Shyness is a temperamental trait that shares considerable conceptual overlap with aspects of internalizing problems, creating difficulties in operationalizing and assessing these two constructs and their association. This study addresses these issues by employing network analyses. Participants were, white, N = 555 children (Mage = 52.45 months, SD = 15.96, 55% girls) followed longitudinally over 4 years (2016–2010) in Norway. Teachers rated child shyness and assessed children's internalizing symptoms. Results suggest that two behavioral shyness traits were the most central aspects of shyness. The centrality of these aspects was robust across age. The most influential symptom connecting internalizing symptoms with shyness was “unhappy.” Shyness became more differentiated with development, and associations between anxiety-related symptoms and shyness increased as children entered formal schooling.  相似文献   

19.
Despite global demand, the large-scale effects of social-emotional learning (SEL) programming in developing countries remain underexplored. Using a randomized control trial, this study examined the effectiveness of a school-wide SEL intervention—Programa Compasso (PC)—among 3,018 sociodemographically diverse, Portuguese-speaking children (Mage = 9.85 years) attending 90 public primary schools across Rio de Janeiro, Brazil in 2017. Average impacts of PC on children’s executive function, emotion knowledge, and behavior problems after one school year were null. Moderation analyses did, however, reveal evidence for positive impacts of PC on children’s labeling of emotional expressions and inhibitory control within low-homicide communities (d = 0.15 SDs), and null effects on these same outcomes in high-violence areas. Implementation and cultural considerations are discussed.  相似文献   

20.
In a recent article, Castro-Schilo, Widaman, and Grimm (2013) compared different approaches for relating multitrait–multimethod (MTMM) data to external variables. Castro-Schilo et al. reported that estimated associations with external variables were in part biased when either the correlated traits–correlated uniqueness (CT-CU) or correlated traits–correlated (methods–1) [CT-C(M–1)] models were fit to data generated from the correlated traits–correlated methods (CT-CM) model, whereas the data-generating CT-CM model accurately reproduced these associations. Castro-Schilo et al. argued that the CT-CM model adequately represents the data-generating mechanism in MTMM studies, whereas the CT-CU and CT-C(M–1) models do not fully represent the MTMM structure. In this comment, we question whether the CT-CM model is more plausible as a data-generating model for MTMM data than the CT-C(M–1) model. We show that the CT-C(M–1) model can be formulated as a reparameterization of a basic MTMM true score model that leads to a meaningful and parsimonious representation of MTMM data. We advocate the use confirmatory factor analysis MTMM models in which latent trait, method, and error variables are explicitly and constructively defined based on psychometric theory.  相似文献   

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