Assessing Model Similarity in Structural Equation Modeling

Two models can be nonequivalent, but fit very similarly across a wide range of data sets. These near-equivalent models, like equivalent models, should be considered rival explanations for results of a study if they represent plausible explanations for the phenomenon of interest. Prior to conducting a study, researchers should evaluate plausible models that are alternatives to those hypothesized to evaluate whether they are near-equivalent or equivalent and, in so doing, address the adequacy of the study’s methodology. To assess the extent to which alternative models for a study are empirically distinguishable, we propose 5 indexes that quantify the degree of similarity in fit between 2 models across a specified universe of data sets. These indexes compare either the maximum likelihood fit function values or the residual covariance matrices of models. Illustrations are provided to support interpretations of these similarity indexes.     

Predicting First Grade Reading Performance from Kindergarten Response to Tier 1 Instruction

Many schools are beginning to implement multi-tier response to intervention (RTI) models for the prevention of reading difficulties and to assist in the identification of students with learning disabilities (LD). The present study was part of our larger ongoing longitudinal RTI investigation within the Florida Learning Disabilities Center grant. This study used a longitudinal correlational design, conducted in 7 ethnically and socio-economically diverse schools. We observed reading instruction in 20 classrooms, examined response rates to kindergarten Tier 1 instruction, and predicted students' first grade reading performance based upon kindergarten growth and end of year reading performance (n = 203). Teachers followed an explicit core reading program and overall, classroom instruction was rated as effective. Results indicate that controlling for students' end of kindergarten reading, their growth across kindergarten on a variety of language and literacy measures suppressed predictions of first grade performance. Specifically, the steeper the students' trajectory to a satisfactory outcome, the less likely they were to demonstrate good performance in first grade. Implications for future research and RTI implementation are discussed.     

Item-Response Changes on Multiple-Choice Tests as a Function of Test Anxiety

Item-response changing as a function of test anxiety was investigated. Seventy graduate students completed the Test Anxiety Scale and 73 multiple-choice items during the quarter. The data supported the hypothesis that high test-anxious students make more item-response changes than low test-anxious students. Results also suggested that both high- and low-anxious students profit to a similar extent proportionally from answer changing. It was further found that more responses were changed on difficult than on easy items for both high- and low-anxious students. Test anxiety is suggested as a factor forming test-taking style.     

Teaching about violence prevention: A bridge between public health and criminal justice educators

Public health perspectives on violence-related injuries have become increasingly important over the past two decades, yet they are rarely mentioned in criminal justice educational texts or articles. Here we provide a brief overview of the public health approach to the prevention of violence and related injuries and compare it to an approach to crime prevention commonly associated with the criminal justice approach: deterrence. The prevention of sexual assault on college and university campuses is used as an illustration of the two approaches. Finally, given the similarities between the manner in which these two multi-disciplinary fields approach violence prevention, we explore how and why criminal justice educators might want to teach a bridge between public health and criminal justice.     

Evidence-based practice: extending the search to find material for the systematic review

BACKGROUND: Cochrane-style systematic reviews increasingly require the participation of librarians. Guidelines on the appropriate search strategy to use for systematic reviews have been proposed. However, research evidence supporting these recommendations is limited. OBJECTIVE: This study investigates the effectiveness of various systematic search methods used to uncover randomized controlled trials (RCTs) for systematic reviews. Effectiveness is defined as the proportion of relevant material uncovered for the systematic review using extended systematic review search methods. The following extended systematic search methods are evaluated: searching subject-specific or specialized databases (including trial registries), hand searching, scanning reference lists, and communicating personally. METHODS: Two systematic review projects were prospectively monitored regarding the method used to identify items as well as the type of items retrieved. The proportion of RCTs identified by each systematic search method was calculated. RESULTS: The extended systematic search methods uncovered 29.2% of all items retrieved for the systematic reviews. The search of specialized databases was the most effective method, followed by scanning of reference lists, communicating personally, and hand searching. Although the number of items identified through hand searching was small, these unique items would otherwise have been missed. CONCLUSIONS: Extended systematic search methods are effective tools for uncovering material for the systematic review. The quality of the items uncovered has yet to be assessed and will be key in evaluating the value of the systematic search methods.     

‘The helping,the fixtures,the kits,the gear,the gum shields,the food,the snacks,the waiting,the rain,the car rides … ’: social class,parenting and children's organised activities

ABSTRACT

Class-related parenting cultures and ideologies have been of considerable interest to academics over the last two decades. Much of the research thus far has focused on exploring Annette Lareau's conceptualisations of ‘natural growth’ and ‘concerted cultivation’ and the implications for outcomes in relation to education. The focus of the present article is organised activities, which are a central but as yet relatively under-researched feature of middle-class parenting. The findings are based upon 73 semi-structured interviews with parents and children from 48 middle-class families living in and around a small city in northern England. The article reveals that initiating and facilitating children's organised activities is considered a central aspect of ‘good’ parenting in middle-class social networks. It is shown how this is a consequence of several developments within society over the past three decades or so, including the rising levels of maternal employment, the growing competitiveness of the labour market and the increasing concerns related to children's health and safety. It is argued that these developments have heightened middle-class parents’ predisposition to not only be involved with and invest in their children's leisure biographies, but to do so in a more deliberate, rigorous and rational manner.     

High-Quality Preschool: The Socioeconomic Composition of Preschool Classrooms and Children's Learning

Research Findings: As policymakers expand access to preschool, the sociodemographic composition of preschool classrooms will become increasingly important. These efforts may create programs that increase the concentration of children from low-income families or, alternatively, foster the creation of socioeconomically diverse preschool classrooms. What effect the creation of such contexts would have on very young children remains unclear. Using multilevel methods and data on 2,966 children in 704 prekindergarten classrooms, this study explores the relationship between socioeconomic classroom composition and children's social and cognitive development. The results indicate positive associations between the mean socioeconomic status (SES) of the class and children's receptive language, expressive language, and mathematics learning, regardless of children's own sociodemographic backgrounds and the characteristics of their classrooms. However, the analyses indicate no association between the development of social competence and class mean SES. Practice or Policy: The links between classroom SES and language and mathematics development were comparable in size to those associated with instructional quality and even children's own SES. Neither structural nor instructional characteristics of prekindergarten classrooms explained these relationships, suggesting the possibility of direct peer effects. The findings indicate that the composition of children's classrooms should be considered an important aspect of preschool quality.