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Author: Sayer, Aline G.

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1.	Collins, Linda M. Sayer, Aline G.
1.	New Methods for the Analysis Of Change Decade of Behavior Series. Washington, DC: American Psychological Association, 2001 Cohort(s): NLSY79, Young Men, Young Women Publisher: American Psychological Association (APA) Keyword(s): Data Analysis; Data Quality/Consistency; Modeling; Modeling, Multilevel This volume presents state-of-the-art methods explored by recognized authorities on the analysis of change. Chapters highlight methods for estimating and evaluating models of growth and change over time at the level of the individual; address issues of measurement that are important in the analysis of change; point out methods for separating intra-individual growth from some aspects of phenomena that are stable over time; identify larger frameworks to integrate knowledge; and provide methods for dealing with missing data. This volume of methodological advances will influence a variety of disciplines from psychology and sociology to education and economics. (PsycINFO Database Record (c) 2000 APA, all rights reserved).
	Bibliography Citation Collins, Linda M. and Aline G. Sayer. New Methods for the Analysis Of Change. Decade of Behavior Series. Washington, DC: American Psychological Association, 2001.

2.	Kam, Chi-Ming Sayer, Aline G.
2.	Growth Modeling of Mathematics Achievement using Ordinary and Weighted Least Squares Methods Part 1: Descriptive Analysis Technical Report 97-24. University Park, PA: The Methodology Center, The Pennsylvania State University, 1997 Cohort(s): Children of the NLSY79 Publisher: Methodology Center, The Pennsylvania State University Keyword(s): Data Analysis; Methods/Methodology; Modeling, Growth Curve/Latent Trajectory Analysis; Peabody Individual Achievement Test (PIAT- Math); Test Scores/Test theory/IRT Permission to reprint the abstract has not been received from the publisher. From this brief review, it seems clear that school achievement may influence whether children develop tendencies to use drugs. The underlying mechanism of influence, however, is still not known. Most studies have focused on achievement status, i.e., the level of achievement the child has at a single point in time. Few studies have examined whether growth in achievement (learning rates) predicts drug use. We propose to examine this factor to see if persistence in achievement is more predictive than status at any given time.
	Bibliography Citation Kam, Chi-Ming and Aline G. Sayer. "Growth Modeling of Mathematics Achievement using Ordinary and Weighted Least Squares Methods Part 1: Descriptive Analysis." Technical Report 97-24. University Park, PA: The Methodology Center, The Pennsylvania State University, 1997.

3.	Kam, Chi-Ming Sayer, Aline G.
3.	Scalogram Analysis of an Index of Substance Use Technical Report 98-24. University Park, PA: The Methodology Center, The Pennsylvania State University, 1998 Cohort(s): Children of the NLSY79, NLSY79 Young Adult Publisher: Methodology Center, The Pennsylvania State University Keyword(s): Adolescent Behavior; Alcohol Use; Child Self-Administered Supplement (CSAS); Gender Differences; Methods/Methodology; Modeling; Peabody Individual Achievement Test (PIAT- Math); Scale Construction; Substance Use Permission to reprint the abstract has not been received from the publisher. The goal of this report is to describe the creation of an index of alcohol use and assess the concurrent validity of the scale. We also report on the application to our scale development of a new technique for imputing missing data and we describe some considerations when using this technique with the types of indicators typically used to assess substance use.
	Bibliography Citation Kam, Chi-Ming and Aline G. Sayer. "Scalogram Analysis of an Index of Substance Use." Technical Report 98-24. University Park, PA: The Methodology Center, The Pennsylvania State University, 1998.

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