11_MultivariateIntraVar_033110

11_MultivariateIntraVar_033110 - HDFS 597K March 31, 2010

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1 MULTIVARIATE INTRAINDIVIDUAL VARIABILITY: HDFS 597K March 31, 2010 Net & Time-Structured J. Pol ock, Summertime: Number 9A, 1948 Measurement/Modeling of … • Two avenues: (Fiske & Rice, 1955; Ram & Gerstorf, 2009) Net Intraindividual Variability • Quantity of variability or – “spontaneous variability” – those changes that do not spontaneous variability those changes that do not show any systematic trends over time (i.e., the ordering of occasions is immaterial) Time-Structured Intraindividual Variability • Characteristics of variability – “reactive or adaptive variability” – those changes that are ordered or organized in some fashion (e.g., cycles and oscillations) Dynamic Characteristics Dynamic Processes T: Activities that connect prior states to future states M: Models describing systematic time-dependency Net Intraindividual Variability Time-Structured Intraindividual Variability Capacities or potentials for change :T Measures describing the extent or range of behavior :M Multivariate Intraindividual Variability Intraindividual Variability across time (context) – Multivariate, multi-occasion Variables Occasions Individual Multivariate Intraindividual Variability: Covariation Æ P-technique C. Twombly, from 8 Odi di Orazio , 1968 Net Intraindividual Covariation Quantity of variability or • “spontaneous variability” – those changes that do not show any systematic trends over time (i.e., the ordering of occasions is immaterial) Measures of Association: • Quantifying how (within-person) variation in one variable is associated with (within) variation in another ?
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11_MultivariateIntraVar_033110 - HDFS 597K March 31, 2010

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