Diagnostic classification models (DCMs) have grown in popularity as stakeholders increasingly desire actionable information related to students' skill competencies. Longitudinal DCMs offer a psychometric framework for providing estimates of students' proficiency status transitions over time. For both cross-sectional and longitudinal DCMs, it is…

This article examines the validity of IQ-achievement discrepancy and low achievement as criteria for the identification of disabilities in Spanish-speaking English-language learners (ELs) and the factors that moderate the validity of these approaches as bases for identification. While there has been a long history of examining the validity of…

This article examines the validity of IQ-achievement discrepancy and low-achievement as criteria for the identification of disabilities in Spanish-speaking ELs and the factors that moderate the validity of these approaches as bases for identification. While there has been a long history of examining the validity of different approaches to…

Objective: To determine if meaningful groups of at-risk pre-adolescent youth could be identified based on their self-report of physical and sexual abuse histories. Methods: Youth participating in a consortium of ongoing longitudinal studies were interviewed using an audio-computer assisted self-interview (A-CASI) when they were approximately 12…

Aim: To examine the stability of caregiver-reported classifications of function of children with cerebral palsy (CP) measured 12 months apart. Method: Participants were 86 children (50 males, 36 females) with CP of all motor types and severities who were recruited into a population-based longitudinal study. Children were aged 11 years 8 months (SD…

The purpose of this study was to examine (1) the stability of latent classes associated with reading disability (RD) and typical development (TD) across time, (2) the importance of speeded word recognition as a latent class indicator of RD and TD, and (3) possible early indicators of students with late-emerging RD. Analyses were based on a…

Purpose: The contribution of genetic factors in the persistence of and early recovery from stuttering was assessed. Method: Data from the Twins Early Development Study were employed. Parental reports regarding stuttering were collected at ages 2, 3, 4, and 7 years, and were used to classify speakers into recovered and persistent groups. Of 12,892…

Several methods exist for typologizing dyadic relationships. The present study reviews the utility of methods for typologizing relationships, exploring the strengths and weaknesses of 3 different approaches, and applying them to the study of adolescent sibling relationships. The 3 methods examined are a priority methods, cluster analysis, and…

A two-step procedure is proposed for detecting behavioral patterns in observational data in evaluation research. Latent class analysis is used to derive a classification of single observations at the variable level. The second step uses the probabilities that each observation falls into latent classes to derive behavioral preference scores. (SLD)

This is one of few professional books that addresses the subject of stuttering in young children. This is surprising considering that most cases of stuttering begin in the preschool years and that the prevalence of the disorder in very young children is higher than in any other age group. This excellent and informative text is written for…

A novel approach to the collection and utilization of program treatment information that quantifies innovative educational practices is described. Data was collected from groups of students within grade and within subject matter area who were exposed to the same program characteristics. These flexibly defined "educational experience…

This document provides a current assessment of the role and character of longitudinal studies. Eighteen articles define this type of study, discuss its applications to the educational process, advise when to use longitudinal inquiry, and describe barriers formed by lack of statistical techniques in manipulating the data. The traditional argument…

This document is the fifth volume in a 5-part series that reports the results of a project undertaken to critically review and analyze major longitudinal studies of child and student development. These studies were conducted to discover the variables, techniques, methodologies, and problems pertinent to evaluative studies of the effects of schools…