09_IntraVar_031710

09_IntraVar_031710 - HDFS 597K March 17, 2010 Aligning...

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1 INTRAINDIVIDUAL VARIABILITY: Total = Tim -Structured + Ne HDFS 597K March 17, 2010 HDFS 597K Applied Longitudinal Data Analysis Time Structured + Net Aligning Theory, Method, & Data Theory – A logically self-consistent framework for describing behavior • Hypotheses Models – A mathematical/formal structure where ideas collide with observations Æ Inferences regarding how well theory approximates reality Data – A selected set of observations – Multivariate/Longitudinal • Reality A Theory / Method / Data “Tethering” of Intraindividual Variability 1. IntraVar Constructs – Dynamic Characteristics & Dynamic Processes • Naming constructs – Defining constructs 2. IntraVar Measures & Models – Time-Structured IntraVar & Net IntraVar • Assumptions (iid = independently and identically distributed) 3. IntraVar Data – Multi-Time-Scale “Burst” Designs • Development of Dynamic Characteristics & Processes A Lifespan Developmental Perspective (Baltes & Nesselroade, 1979) (Meta)Theory: “Interest in the description, explanation, prediction, and modification of processes that lead to a given outcome or sequence of outcomes” (Meta)Methods & Data: “Longitudinal methodology involves repeated, time- ordered observation of an individual or individuals with the goal of identifying processes and causes …” Movement, Change, Development, Dynamics Traces of Behavior R. Long, Walking a Circle in Mist, Scotland 1986 Cognitive Performance
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2 Individual Daily Mood Ram, Chow, Bowles, Wang, Grimm, Fujita, & Nesselroade, 2005, Psychometrika Intraindividual Dynamics 28-day Cycles Daily Mood (M. Lebo Data) P#1 = 28 day cycle in Negative Affect factor R 2 = .21 P#3 = 28 day cycle in Positive Affect factor R 2 = .11 A A Characteristic (iSD) cess (frequency) BB Macro-Time (e.g., Age, DtD) Magnitude of Dynamic or Dynamic Proc Intraindividual Change – Aging – Dying Nesselroade, 1991 Ram & Gerstorf, in press Dynamic Characteristics Dynamic Processes Tethering IntraVar Theory to Method Constructs ÅÆ Measures & Models Net Intraindividual Variability Time-Structured Intraindividual Variability A Single Occasion of Measurement Intraindividual Stability “Trait” Assumption? Score Entity A 1 Occasion 20 10 Multiple Occasions of Measurement Intraindividual Variability “Traits” vs “States Entity A 1 Occasion 20 10 “Traits” vs. “States”
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3 Multiple Occasions of Measurement Measures of Central Tendency Score Entity A 1 Occasion 20 10 Central Tendency (Mean, Median, etc.) Multiple Occasions of Measurement Measures of ‘Dispersion’ Entity A 1 Occasion 20 10 Dispersion / Variance (Gross Variability)
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09_IntraVar_031710 - HDFS 597K March 17, 2010 Aligning...

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