Preventing panel members from attriting is a fundamental challenge for panel surveys. Research has shown that response behavior in earlier waves (response or nonresponse) is a good predictor of panelists' response behavior in upcoming waves. However, response behavior can be described in greater detail by considering the time until the response is…

This study shows that residual variation can cause problems related to scaling in exponential random graph models (ERGM). Residual variation is likely to exist when there are unmeasured variables in a model--even those uncorrelated with other predictors--or when the logistic form of the model is inappropriate. As a consequence, coefficients cannot…

We examine the performance of planned missing (PM) designs for correlated latent growth curve models. Using simulated data from a model where latent growth curves are fitted to two constructs over five time points, we apply three kinds of planned missingness. The first is item-level planned missingness using a three-form design at each wave such…

Missing data is endemic in much educational research. However, practices such as step-wise regression common in the educational research literature have been shown to be dangerous when significant data are missing, and multiple imputation (MI) is generally recommended by statisticians. In this paper, we provide a review of these advances and their…

In the context of "academic momentum," a longitudinal study of university students (N = 904) showed high school achievement and ongoing university achievement predicted subsequent achievement through university. However, the impact of high school achievement diminished, while additive effects of ongoing university achievement continued.…

Challenges the typical treatment of causal effects in longitudinal data, arguing that models should be conceptualized and tested in ways that directly reflect prior assumptions as to the trait- or state-like nature of the variables. Examples demonstrate that meaningful longitudinal studies of state variables can be conducted without assuming their…

A study by Rebecca Marcon, published in a preceding issue of Early Childhood Research and Practice, examined the effects of various preschool models on later academic achievement and found that an academically oriented preschool model had negative effects in later school years. This document combines a commentary by Christopher J. Lonigan and…

Describes a random effects discrete time survival model that addresses problems of measurement error and sample design complexities. Demonstrates the effectiveness of the model in an analysis of retrospective report data on the age of onset of smoking from two cross-sectional school-based studies. (JPB)

In the study, a part of longitudinal research focused on the emergence of mathematical knowledge structures in a learner's mind is presented. It concentrates on the analysis of introspective data gained from the author's study of a non-standard arithmetic structure in terms of the model of abstraction in context (Hershkowitz, Schwarz and Dreyfus).…

This article describes the Munich Longitudinal Study of Giftedness (initially including about 25,000 students) and concludes that, although the multidimensional model proved to be useful in predicting achievement behavior, the typological attempts failed. Distinct differences between academically gifted and creatively gifted students were found.…

Mathematics achievement differences among sixth-graders were analyzed in a four-wave design and explained by aptitude and instructional variables in a structural equation framework. The results demonstrate the local nature of achievement models in that neither their measurement nor structural components proved generalizable across two groups of…

Some of the problems unique to evaluation research, in particular to the evaluation of longitudinal studies of social programs, are presented. A working model found to be useful in structuring compensatory education program evaluation activities is also offered. Since the goals of social programs such as Head Start are dynamic rather than static,…

This document introduces research aimed to explore methods that could be used to make inferences about causual effects of educational change over time when data are from an educational panel. This preface, the first in a series of 14 chapters described in SO 011 760-772, discusses an educational research project designed to examine affects of…

Current theories of intellectual development claim that such development proceeds through invariant sequences of increasingly more adequate cognitive structures. According to the two dominant theories on changes in intellectual functioning during adulthood, intellectual development is essentially accomplished by adolescence, although sharpening…

This volume presents monographs relating to the second annual report of the National Evaluation of Follow Through. Monograph 1 is concerned with site-by-site analyses of academic achievement scores for children after two years in the same Follow Through program. Conclusions dealing with first grade vs. kindergarten effects, site effects, and the…