Tests of Simple Slopes in Multiple Regression Models with an Interaction: Comparison of Four Approaches

In multiple regression researchers often follow up significant tests of the interaction between continuous predictors X and Z with tests of the simple slope of Y on X at different sample-estimated values of the moderator Z (e.g., ±1 SD from the mean of Z). We show analytically that when X and Z are randomly sampled from the population, the variance expression of the simple slope at sample-estimated values of Z differs from the traditional variance expression obtained when the values of X and Z are fixed. A simulation study using randomly sampled predictors compared four approaches: (a) the Aiken and West (1991 Aiken, L. S., &; West, S. G. (1991). Multiple regression: Testing and interpreting interactions. Newbury Park, CA: Sage.[Crossref] , [Google Scholar]) test of simple slopes at fixed population values of Z, (b) the Aiken and West test at sample-estimated values of Z, (c) a 95% percentile bootstrap confidence interval approach, and (d) a fully Bayesian approach with diffuse priors. The results showed that approach (b) led to inflated Type 1 error rates and 95% confidence intervals with inadequate coverage rates, whereas other approaches maintained acceptable Type 1 error rates and adequate coverage of confidence intervals. Approach (c) had asymmetric rejection rates at small sample sizes. We used an empirical data set to illustrate these approaches.     

4、5岁儿童一般语言能力和心理理论关系的纵向研究

为探明汉语儿童语言和心理理论的发展, 追踪二者的动态关系及相互作用的方向, 本研究以80名4、5岁儿童为研究对象, 纵向探查了前后相隔6个月的儿童的一般语言能力和心理理论的发展状况, 并运用交叉-滞后组相关分析初步探查了二者是否存在因果关系及可能的作用方向。结果表明：4~5岁是汉语儿童心理理论发展的重要时期, 语言在这一阶段也得到快速发展。交叉-滞后组相关分析发现了4岁儿童语言和心理理论因果关系的证据, 但随着年龄的增长, 语言对心理理论的前提基础作用有所减弱, 5岁儿童没有表现出这种因果关系。     

组织气氛与员工参与的关系

员工参与是提高组织绩效的重要一环 ,也是组织提高运作效率和使员工产生积极心态的关键 ;组织气氛是影响员工参与的一个重要因素。文章探讨了组织气氛与员工参与之间的关系 ,对全国各地区共 14 8家企业的90 4份调查问卷进行了单因素方差分析和逐步回归分析。研究结果表明 ,员工参与变量有显著的所有制差异和地区差异 ;低科层性的、创新性的和支持性的组织气氛会显著地提高员工参与水平 ;企业的科层式管理体制 ,是影响员工参与水平的最显著因素。研究结果对我国企业管理者有重要的启示     

温尼科特的精神分析客体关系理论的治疗观

温尼科特是英国精神分析客体关系学派的重要代表人物,提出了独特的精神分析治疗观,以提供抱持性的分析情境为核心,强调退行至依赖的治疗过程,重视精神分析师的反移情中的恨的情绪体验,珍视病人的主动不交流等,在很多方面颠覆了经典的精神分析治疗观。     

Spatial-temporal analysis of pedestrian injury severity with geographically and temporally weighted regression model in Hong Kong

This study intended to (1) investigate the pedestrian injury severity involved in traffic crashes; and (2) address the spatial and temporal heterogeneity simultaneously. To achieve the objectives, geographically and temporally weighted regression (GTWR) model was proposed to deal with both spatial and temporal heterogeneity simultaneously. The pedestrian crash data of Hong Kong metropolitan area from 2008 to 2012 were collected, involving 1652 pedestrian-related injury samples. By comparing GTWR model and standard geographically weighted regression (GWR) model and temporally weighted regression (TWR) model, the proposed GTWR model showed potential benefits in modeling both spatial and temporal non-stationarity simultaneously in terms of goodness-of-fit and F statistics. Results revealed that number of vehicles, number of pedestrian-related casualties, speed limit, vehicle movement and injury location have significant influence on pedestrian injury severity in different areas. The conclusions are reached that GRWR model can address the relationship between pedestrian injury severities and influencing factors, as well as accommodating spatial and temporal heterogeneity simultaneously. The findings provide useful insights for practitioners and policy makers to improve pedestrian safety.     

Values and adolescents' self-esteem: The role of value content and congruence with classmates

The study examined the relations between adolescents’ self-esteem and two aspects of values: content and congruence with classmates. Using a large sample of Israeli adolescents (N = 1,683; M_age = 14.36, SD = 2.24, range = 11–18, 54.31% females), we found that self-esteem related negatively to self-enhancement values and positively to conservation values using zero order correlations. Multilevel polynomial regressions, controlling for demographic differences, found significant quadratic associations of self-esteem with self-enhancement, self-transcendence, openness-to-change, and conservation values. Furthermore, using Response Surface Analyses, it was found that adolescents who were congruent with their classmates’ self-enhancement and self-transcendence values showed the highest levels of self-esteem. The findings point to the importance of social context for the relations between values and self-esteem among adolescents.     

Measurement scales and scale independence in the analytic hierarchy process

One approach to evaluate the relative performance of decision alternatives with respect to multiple criteria is provided by the analytic hierarchy process. The method is based on pairwise comparisons between attributes, and several numerical measurement scales for the ratio statements have been proposed. The choice of measurement scale is re‐examined, and new arguments supporting the measurement scale of geometric progression are derived. Separately from the measurement scale considerations, the effects of the scale parameter in geometric measurement scale are also studied. By using a regression model for pairwise comparisons data, it is shown that the statistical inference does not depend on the value of the scale parameter in the case of a single pairwise comparison matrix. It is also shown when the scale independence of statistical inference can be achieved in a decision hierarchy. This requires the use of the geometric‐mean aggregation rule instead of the traditional arithmetic‐mean aggregation. The results of the case study demonstrate that the measurement scale and the aggregation rule have potentially large impacts on decision support. Copyright © 2000 John Wiley & Sons, Ltd.     

Factors associated with red-light running among motorcyclists at signalised junctions in Malaysia

Red-light running (RLR) among motorcyclists at signalised junctions (SJ) in Malaysia are common. This study investigates factors associated with RLR among motorcyclists at signalised junctions. The observation was conducted in 2016–2017, at 26 signalised junctions nationwide, and was analysed using the mixed-effect logistic regression. Out of the 53,475 observed vehicles, only 3.6% run the red light (by which 99% are motorcycles), and from the 19,232 observed motorcycles, 26.2% among motorcyclists run the red light while 54.1% of them, run the red-light without stopping. Factors associated with a high probability of RLR are male riders who do not wear a helmet, who approach the SJ via lane split, who cross SJ via turning, SJ with no traffic island, and SJ with the presence of vehicles waiting on one or both legs. The random parameters show that the majority (83%) of variation in the outcomes occurs among the riders (at Level 1), which suggest that motorcyclists’ characteristics and riding behaviour are still the main factors in affecting the RLR occurrences and require more in-depth study. While 1.5% of variation occurs among the type of motorcycle by region (at Level 2), it also shows that RLR occurs regardless. Other variations are from the range of median width (3.9% at Level 3) and the speed limit range along major roads (9.5% at Level 4). To reduce RLR among motorcyclists, we are recommending that SJ be equipped with traffic islands, and replace the overhead signal pole with pedestal pole.     

Ecological social capital does not predict geographical variance in increases in depression following the 2008 financial crisis

Research suggests that the financial crisis of 2008 and its aftermath were associated with an increase in mental health problems, but there has been little research into potential protective factors. Ecological social capital is a plausible candidate given evidence of its protective status following natural disasters. Pre-crisis area-level estimates of generalized trust and sense of belonging were computed from the 2004 to 2006 waves of the Living in Wales survey (N = 43,473) for 413 neighbourhoods in Wales, using multilevel regression with post-stratification, a technique for disaggregating survey data into small area estimates. Area estimates and the planned analysis were preregistered using Open Science Framework. Data (N = 180,462) from the Welsh Health Survey (2003–2015) were then used to model whether social capital was protective against depression in general and whether it moderated the increase in depression prevalence, associated with the financial crisis. Depression rates increased post-crisis (odds ratio [OR] = 1.271), and trust was a protective factor against depression (OR = 0.775). The hypothesized interaction, however, was not significant (OR = 1.033), nor was sense of belonging (OR = 0.934) or its interaction with the crisis (OR = 1.024). Although ecological generalized trust appears to be a protective factor against depression, it did not buffer against the mental health impact of the financial crisis.