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Author: Kam, Chi-Ming

Resulting in 7 citations.

1.	Kam, Chi-Ming Collins, Linda M.
1.	Latent Transition Analysis of Substance Use Among Adolescents in the National Longitudinal Survey Technical Report Series No 0037. University Park, PA: The Methodology Center, The Pennsylvania State University, 2000. Also: http://methcenter.psu.edu/pubs/00-37.pdf Cohort(s): Children of the NLSY79 Publisher: Methodology Center, The Pennsylvania State University Keyword(s): Alcohol Use; Behavioral Problems; Child Self-Administered Supplement (CSAS); Cigarette Use (see Smoking); Gender Differences; Modeling; Substance Use Permission to reprint the abstract has not been received from the publisher. The present study examines gender differences in substance use onset among 886 adolescents surveyed in the National Longitudinal Survey of Youth (NLSY). Three waves of data on adolescent substance use were analyzed using Latent Transition Analysis (LTA). To test the gateway hypothesis of substance use (Kandel & Yamaguchi, 1993; Collins, 1998a), transition probabilities of adolescent exposure to three substances, alcohol, cigarettes and marijuana, were estimated. In addition, a strategy similar to that employed by Collins, Graham, Long and Hansen (1994) was used to test gender differences in substance use onset among the NLSY adolescents. Nested models with different degrees of parameter restrictions were fitted to the data. First, a model that represents gender differences in all three sets of parameters (Big Rho's, Delta's, & Tau's) was fitted. Other models that constrained some of these parameters to be equal between gender were fitted subsequently. Model fit statistics were compared among models and the best fitting one was selected for interpretation. The results suggested that the model that represented no gender differences in all three parameter sets fit the data best. This suggests there are no gender differences in the types of substance use patterns (number and types of latent statuses), the proportion of adolescents falling into each latent status and the transition pattern of substance use. In addition, the study supports the gateway hypothesis that cigarette and alcohol usage are precursors to the use of marijuana. Due to the high percentage of non-response to substance use items in the survey as well as the weak measure of marijuana use, the present findings have to be interpreted with caution.
	Bibliography Citation Kam, Chi-Ming and Linda M. Collins. Latent Transition Analysis of Substance Use Among Adolescents in the National Longitudinal Survey. Technical Report Series No 0037. University Park, PA: The Methodology Center, The Pennsylvania State University, 2000..

2.	Kam, Chi-Ming Collins, Linda M.
2.	Latent Transition Analysis of Substance Use Among Adolescents in the National Longitudinal Survey of Youth Presented: Beijing, China, XVI Biennial Meetings of the International Society for the Study of Behavioral Development, June 2000 Cohort(s): Children of the NLSY79 Publisher: Methodology Center, The Pennsylvania State University Keyword(s): Modeling, Growth Curve/Latent Trajectory Analysis; Modeling, Multilevel; Substance Use Permission to reprint the abstract has not been received from the publisher. Poster to be presented at the XVI Biennial Meetings of the International Society for the Study of Behavioral Development (ISSBD 2000), Beijing, China. See also: http://methcenter.psu.edu/publications/00-37.pdf for abstract summary.
	Bibliography Citation Kam, Chi-Ming and Linda M. Collins. "Latent Transition Analysis of Substance Use Among Adolescents in the National Longitudinal Survey of Youth." Presented: Beijing, China, XVI Biennial Meetings of the International Society for the Study of Behavioral Development, June 2000.

3.	Kam, Chi-Ming Collins, Linda M.
3.	Latent Transition Analysis of Substance Use Among Adolescents in the National Longitudinal Survey of Youth Presented: New Orleans, LA, Society for Prevention Research Meetings, June 1999 Cohort(s): Children of the NLSY79 Publisher: Society for Prevention Research Keyword(s): Adolescent Behavior; Modeling, Growth Curve/Latent Trajectory Analysis; Modeling, Multilevel; Substance Use Permission to reprint the abstract has not been received from the publisher. Poster presented at the Society for Prevention Research meetings, New Orleans, LA. See also: http://methcenter.psu.edu/publications/00-37.pdf for abstract summary.
	Bibliography Citation Kam, Chi-Ming and Linda M. Collins. "Latent Transition Analysis of Substance Use Among Adolescents in the National Longitudinal Survey of Youth." Presented: New Orleans, LA, Society for Prevention Research Meetings, June 1999.

4.	Kam, Chi-Ming Sayer, Aline G.
4.	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.

5.	Kam, Chi-Ming Sayer, Aline G.
5.	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.

6.	Kam, Chi-Ming Wagstaff, David A.
6.	Longitudinal Analysis of Complex Survey Data: Math and Reading Achievement from the National Longitudinal Survey of Youth (NLSY), 1986-1994 In: New Methods for the Analysis of Change. L. Collins and A. Sayer, eds., Washington, DC: American Psychological Association, 2001: Appendix M Cohort(s): Children of the NLSY79 Publisher: American Psychological Association (APA) Keyword(s): Data Analysis; Methods/Methodology; Modeling, Mixed Effects; Peabody Individual Achievement Test (PIAT- Math); Peabody Individual Achievement Test (PIAT- Reading) See New Methods for the Analysis of Change. L. M. Collins and A. G. Aline, eds., for a resume of the monograph, "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."
	Bibliography Citation Kam, Chi-Ming and David A. Wagstaff. "Longitudinal Analysis of Complex Survey Data: Math and Reading Achievement from the National Longitudinal Survey of Youth (NLSY), 1986-1994" In: New Methods for the Analysis of Change. L. Collins and A. Sayer, eds., Washington, DC: American Psychological Association, 2001: Appendix M

7.	Kam, Chi-Ming Wagstaff, David A.
7.	Longitudinal Analysis of Complex Survey Data: Math and Reading Achievement from the National Longitudinal Survey Of Youth (NLSY), 1986-1994 Presented: University Park, PA, New Methods for the Analysis of Change Conference, the Methodology Center, the Pennsylvania State University, October 1998 Cohort(s): Children of the NLSY79 Publisher: Methodology Center, The Pennsylvania State University Keyword(s): Data Analysis; Methods/Methodology; Modeling, Fixed Effects; Peabody Individual Achievement Test (PIAT- Math); Peabody Individual Achievement Test (PIAT- Reading) Permission to reprint the abstract has not been received from the publisher. Poster presented at New Methods for the Analysis of Change conference, The Pennsylvania State University, University Park, PA.
	Bibliography Citation Kam, Chi-Ming and David A. Wagstaff. "Longitudinal Analysis of Complex Survey Data: Math and Reading Achievement from the National Longitudinal Survey Of Youth (NLSY), 1986-1994." Presented: University Park, PA, New Methods for the Analysis of Change Conference, the Methodology Center, the Pennsylvania State University, October 1998.

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