The Impacts of Ignoring a Crossed Factor in Analyzing Cross-Classified Data

Cross-classified random-effects models (CCREMs) are used for modeling nonhierarchical multilevel data. Misspecifying CCREMs as hierarchical linear models (i.e., treating the cross-classified data as strictly hierarchical by ignoring one of the crossed factors) causes biases in the variance component estimates, which in turn, results in biased estimation in the standard errors of the regression coefficients. Analytical studies were conducted to provide closed-form expressions for the biases. With balanced design data structure, ignoring a crossed factor causes overestimation of the variance components of adjacent levels and underestimation of the variance component of the remaining crossed factor. Moreover, ignoring a crossed factor at the kth level causes underestimation of the standard error of the regression coefficient of the predictor associated with the ignored factor and overestimation of the standard error of the regression coefficient of the predictor at the (k?1)th level. Simulation studies were also conducted to examine the effect of different structures of cross-classification on the biases. In general, the direction and magnitude of the biases depend on the level of the ignored crossed factor, the level with which the predictor is associated at, the magnitude of the variance component of the ignored crossed factor, the variance components of the predictors, the sample sizes, and the structure of cross-classification. The results were further illustrated using the Early Childhood Longitudinal Study-Kindergarten Cohort data.     

The Impact of Childhood Emotional Abuse on Adolescents’ Subjective Happiness: the Mediating Role of Emotional Intelligence

Subjective happiness has been considered a key indicator of adolescents’ healthy development. The present study aimed at identifying the impact of childhood emotional abuse on adolescents’ subjective happiness and the possible role of emotional intelligence as a mediating variable. Using convenience sampling, a cross-sectional survey was conducted with 9 secondary schools in Hong Kong, China. Participants included a total of 1710 grade 8 to grade 9 secondary school students. The mean age was 13.6, and 61.2% were boys. Measures included child abuse and trauma, emotional intelligence, and subjective happiness. The results showed that childhood emotional abuse in adolescents’ childhood is a significant risk factor for subjective happiness. Emotional intelligence has a partial mediation effect on the relationship between childhood emotional abuse and subjective happiness. It is noteworthy that parenting practices in childhood have a significant impact on children’s happiness even after a period of time. It is suggested that students’ emotional intelligence be enhanced to increase their subjective happiness. Although the conventional parenting style may be rooted in Chinese culture, a paradigm shift in parenting seems to be needed for Chinese parents. Efforts should be made to promote appropriate parenting methods and emotional intelligence in Chinese societies. Limitations of the study and recommendations for future research are also discussed.

     

Quality of Life and Bladder Management post Spinal Cord Injury: A Systematic Review

To explore the relationship between neurogenic bladder management techniques and quality of life (QoL) among individuals with spinal cord injury (SCI). A key terms literature search was conducted in multiple electronic databases (i.e., MEDLINE, CINAHL, EMBASE, and PsycINFO). Studies published up to and including May 2013 were reviewed and evaluated based on the following criteria: (1) full-length journal article published in the English language; (ii) human subjects ≥18 years; (iii) ≥?50 % of subjects had a SCI; (iv) results on QoL, as it related to bladder management method, were reported for at least three subjects. A total of 422 articles were extracted and upon review of titles and abstracts, 7 studies met the inclusion criteria. There were two level 2 cohort studies and five level 5 observational studies. Sample sizes ranged from 37 to 282 with an average of 117.1 individuals per study. All participants were at least six months post injury. Bladder management methods used included intermittent (patient/attendant), indwelling (suprapubic/transurethral), and condom catheterization, micturition assistive maneuvers, and electrical stimulation. Normal voiders scored better in all QoL measure domains compared to other management methods. Those using attendant intermittent and indwelling catheterization scored the poorest on the domains Personal Relationships, Emotions, and Mental Health. There is insufficient evidence to provide a definite conclusion as to the relationship between bladder management methods and QoL post SCI. However, individuals relying on others to aid in voiding may experience lower QoL compared to those who are independent.     

Avoidance temperament and social-evaluative threat in college students' math performance: a mediation model of math and test anxiety

Background and Objectives: Standardized testing has become a common form of student evaluation with high stakes, and limited research exists on understanding the roles of students' personality traits and social-evaluative threat on their academic performance. This study examined the roles of avoidance temperament (i.e., fear and behavioral inhibition) and evaluative threat (i.e., fear of failure and being viewed as unintelligent) in standardized math test and course grades in college students. Design and Methods: Undergraduate students (N = 184) from a large public university were assessed on temperamental fear and behavioral inhibition. They were then given 15 minutes to complete a standardized math test. After the test, students provided data on evaluative threat and their math performance (scores on standardized college entrance exam and average grades in college math courses). Results: Results indicate that avoidance temperament was linked to social-evaluative threat and low standardized math test scores. Furthermore, evaluative threat mediated the influence of avoidance temperament on both types of math performance. Conclusions: Results have educational and clinical implications, particularly for students at risk for test anxiety and underperformance. Interventions targeting emotion regulation and stress management skills may help individuals reduce their math and test anxieties.     

The coupling of short sleep duration and high sleep need predicts riskier decision making

Abstract

Objective: To examine how risk-related decision making might be associated with habitual sleep variables, including sleep variability, sleep duration and perceived sleep need in young adults cross-sectionally and longitudinally.

Design: 166 participants completed a 7-day protocol with sleep and risk-related decision-making measures at baseline (T1) and 12 months later (T2).

Results: Habitual short sleep duration (averaging < 6?h nightly) was identified in 11.0% in our sample. After controlling for baseline demographic factors and risk-taking measures, self-reported sleep need at T1 interacted with habitual short sleep in predicting risk taking at follow-up (F_8,139=9.575, adjusted R²=.431, p<.001). T1 greater perceived sleep need predicted more risk taking among short sleepers, but decreased risk taking among normal sleepers at T2. Variable sleep timing was cross-sectionally correlated with making more Risky choices at baseline and fewer Safe choices after loss at follow up.

Conclusions: Young adults with variable sleep timing and those with short sleep duration coupled with high perceived sleep need were more likely to take risks. The moderating effects of perceived sleep need suggest that individual differences may alter the impact of sleep loss and hence should be measured and accounted for in future studies.     

Multilevel modeling: current and future applications in personality research

Traditional statistical analyses can be compromised when data are collected from groups or multiple observations are collected from individuals. We present an introduction to multilevel models designed to address dependency in data. We review current use of multilevel modeling in 3 personality journals showing use concentrated in the 2 areas of experience sampling and longitudinal growth. Using an empirical example, we illustrate specification and interpretation of the results of series of models as predictor variables are introduced at Levels 1 and 2. Attention is given to possible trends and cycles in longitudinal data and to different forms of centering. We consider issues that may arise in estimation, model comparison, model evaluation, and data evaluation (outliers), highlighting similarities to and differences from standard regression approaches. Finally, we consider newer developments, including 3-level models, cross-classified models, nonstandard (limited) dependent variables, multilevel structural equation modeling, and nonlinear growth. Multilevel approaches both address traditional problems of dependency in data and provide personality researchers with the opportunity to ask new questions of their data.     

The effects of being spurned and self-esteem on depersonalization and coping preferences in kindergarten teachers: the case of Hong Kong

The primary objective of this study was to examine, based on a model of spurned helpers’ reactions: (a) the degrees to which kindergarten teachers in Hong Kong, China, experienced recurrent rejections of their offers of help (being spurned) by peer teachers; (b) whether being spurned by peers would induce depersonalization; (c) the ways teachers with higher or lower self-esteem coped with recurrent rejection; and (d) effects of coping in reducing depersonalization. A sample of serving kindergarten teachers in Hong Kong participated in the study. Their levels of self-esteem were first measured. Five months afterwards the extent to which they were spurned by their peers and the way they coped with such rejections were assessed. Another 5 months later the degrees to which they experienced depersonalization were measured. The results showed (a) that the teachers were fairly spurned; (b) that the more spurned the teachers were, the more depersonalized they were towards their peers; and (c) teachers with higher self-esteem and teachers with lower self-esteem coped with being spurned in different ways. The findings suggest that kindergarten teachers should be aware of recurrent rejection of their offers of help by peer workers and also the adverse effects of such rejection, and that administrators should provide training to teachers to assist them to deal with recurrent rejection of help by peers.     

Quality of Life of Individuals with Acquired Brain Injuries

This study investigated the quality of life of individuals with acquired brain injuries (ABI) across a one- to fifteen-year post-injury time span. This allows us to identify the health and service needs of individuals with ABI and provide direction for further improvement. Twenty-nine individuals were invited from the local Self-Help Group for the Brain-Damaged to participate in this study. Four instruments were used to help in the investigation of the subjective components of the quality of life, including the Personal Wellbeing Index (PWI) and Positive and Negative Affect Scales (PANAS). The instruments used were the Modified Barthel Index (MBI) and Lawton Instrumental Activity of Daily Living (IADL) Scale. After analysis of the results and their interpretation, there was no significant difference between the post-injury groups in their scores of negative affect. It is suggested that there should be services, such as psychotherapy, to help reduce the existence of negative moods. Improvement in the IADL aspect should be more focused in future rehabilitation services to allow people to enjoy a fuller life.     

Joint Contributions of Peer Acceptance and Peer Academic Reputation to Achievement in Academically At Risk Children: Mediating Processes

The longitudinal relationships between two dimensions of peer relationships and subsequent academic adjustment were investigated in a sample of 543 relatively low achieving children (M = 6.57 years at Year 1, 1(st) grade). Latent variable SEM was used to test a four stage model positing indirect effects of peer acceptance and peer academic reputation (PAR) assessed in Year 2 on academic achievement in Year 5, via the effects of the peer relationships variables on perceived academic competence in Year 3 and effortful engagement in Year 4. As expected, the effect of PAR on engagement was partially mediated by perceived academic competence, and the effect of perceived academic competence on achievement was partially mediated by engagement. In the context of PAR, peer acceptance did not contribute to the mediating variables or to achievement. Findings provide a clearer understanding of the processes by which early peer-relationships influence concurrent and future school-related outcomes. Implications for educational practice and future research are discussed.