In a sample of 165 older individuals assessed twice at a 2-year interval on tasks of fluid and crystallized intelligence, and intensively (120 trials) on a simple reaction time task, we applied an autoregressive model to estimate both (1) amplitude and (2)...

Three central goals of longitudinal research are the modeling of intraindividual change, the examination of interindividual differences in intraindividual change, and the evaluation of determinants of intraindividual change (). ...

In this paper, we examine the intra- and interindividual variability of daily affect in adult couples. We use a variety of analytic techniques to inspect the daily fluctuations in emotions and to determine whether such fluctuations are influenced by the ...

The current study examined predictors of individual differences in the magnitude of practice-related improvements achieved by 87 older adults (mean age 63.52 years) over 18 weeks of cognitive practice. Cognitive inconsistency, as measured in both baseline ...

Whereas subjective well-being remains relatively stable across adulthood, emotional experiences show remarkable short-term variability, with younger and older adults differing in both amount and correlates. Repeatedly assessed affect data captures both ...