Intraindividual change and interindividual differences in factors influencing older women's health-seeking behavior

Time-structured and net intraindividual variability: tools for examining the development of dynamic characteristics and processes

The study of intraindividual variability is the study of fluctuations, oscillations, adaptations, and "noise" in behavioral outcomes that manifest on microtime scales. This article provides a descriptive frame for the combined study of intraindividual variability and aging/development. At the conceptual level, we show that the study of intraindividual variability provides access to dynamic characteristics-construct-level descriptions of individuals' capacities for change (e.g., lability)--and to dynamic processes--the systematic changes that individuals exhibit in response to endogenous and exogenous influences (e.g., regulation). At the methodological level, we review how quantifications of net intraindividual variability and models of time-structured intraindividual variability are used to measure and describe dynamic characteristics and processes. At the research design level, we point to the benefits of measurement-burst study designs, wherein data are obtained across multiple time scales, for the study of development.

Stability and change in health-related behaviors of midlife Swedish women

We investigated the dimensions and stability in health-related behaviors (HRBs) among midlife Swedish women, and the factors that predicted change in those behaviors. At age 43, 569 women from a representative longitudinal sample completed questionnaires about lifestyle (diet, exercise, smoking, alcohol) and participated in medical screening. Four years later we mailed a follow-up questionnaire. HRBs clustered in two dimensions: healthy eating and addictions. There was a high degree of stability in HRBs; all women slightly increased their HRBs over time. After controlling for previous HRBs, we found that education, marital status, and having children at home were significant predictors of HRBs 4 years later.