A5058957631- Aging and Gerontology Research
- Health disparities and outcomes
- Mental Health Research Topics
- Psychological Well-being and Life Satisfaction
- Child and Adolescent Psychosocial and Emotional Development
- Cognitive Abilities and Testing
- Behavioral Health and Interventions
- Early Childhood Education and Development
- Attachment and Relationship Dynamics
- Impact of Technology on Adolescents
- Psychological and Temporal Perspectives Research
- Intergenerational Family Dynamics and Caregiving
- Stress Responses and Cortisol
- Identity, Memory, and Therapy
- Digital Mental Health Interventions
- Heart Rate Variability and Autonomic Control
- Media Influence and Health
- Functional Brain Connectivity Studies
- Opinion Dynamics and Social Influence
- Neural and Behavioral Psychology Studies
- Complex Systems and Decision Making
- Eating Disorders and Behaviors
- Personality Traits and Psychology
- Youth Development and Social Support
- Optimism, Hope, and Well-being
Stanford University
2020-2025
Palo Alto University
2024
Parul University
2024
Stanford Medicine
2023
Pennsylvania State University
2013-2022
Federal Statistical Office
2021
German Institute for Economic Research
2009-2020
Resources for Human Development
2018
University of Aberdeen
2014-2017
University of Colorado Colorado Springs
2010-2017
Recent evidence suggests that emotional well-being improves from early adulthood to old age. This study used experience-sampling examine the developmental course of experience in a representative sample adults spanning very late adulthood. Participants (N = 184, Wave 1; N 191, 2; 178, 3) reported their states at five randomly selected times each day for one week period. Using measurement burst design, one-week sampling procedure was repeated and then ten years later. Cross-sectional growth...
Growth mixture modeling (GMM) is a method for identifying multiple unobserved sub-populations, describing longitudinal change within each sub-population, and examining differences in among sub-populations. We provide practical primer that may be useful researchers beginning to incorporate GMM analysis into their research. briefly review basic elements of the standard latent basis growth curve model, introduce as an extension multiple-group modeling, describe four-step approach conducting...
The study of intraindividual variability is the fluctuations, oscillations, adaptations, and "noise" in behavioral outcomes that manifest on microtime scales. This article provides a descriptive frame for combined aging/development. At conceptual level, we show access to dynamic characteristics-construct-level descriptions individuals' capacities change (e.g., lability)--and processes--the systematic changes individuals exhibit response endogenous exogenous influences regulation)....
We examine some features of intraindividual variability and the research outcomes from its study. Selected current modeling techniques focused on individual-level analyses are briefly discussed, including promising applications stemming dynamical systems theory work. turn these ideas into issues prominent in study behavioral development how general orientation can strengthen further lives context.
Pubertal development is a nonlinear process progressing from prepubescent beginnings through biological, physical, and psychological changes to full sexual maturity. To tether theoretical concepts of puberty with sophisticated longitudinal, analytical models capable articulating pubertal more accurately, we used mixed-effects describe both the timing tempo in sample 364 White boys 373 girls measured across 6 years as part National Institute Child Health Human Development Study Early Care...
Developmentalists are often interested in understanding change processes, and growth models the most common analytic tool for examining such processes. Nonlinear curves especially valuable to developmentalists because defining characteristics of process as initial levels, rates during spurts, asymptotic levels can be estimated. A variety described beginning with linear model moving nonlinear varying complexity. detailed discussion is provided, highlighting added insights into complex...
Digital experiences capture an increasingly large part of life, making them a preferred, if not required, method to describe and theorize about human behavior. media also shape behavior by enabling people switch between different content easily, create unique threads that pass quickly through numerous information categories. Current methods recording digital provide only partial reconstructions lives weave - often within seconds among multiple applications, locations, functions media. We...
Abstract As the metaverse expands, understanding how people use virtual reality to learn and connect is increasingly important. We used Transformed Social Interaction paradigm (Bailenson et al., 2004) examine different avatar identities environments over time. In Study 1 (n = 81), entitativity, presence, enjoyment, realism increased 8 weeks. Avatars that resembled participants synchrony, similarities in moment-to-moment nonverbal behaviors between participants. Moreover, self-avatars...
In social media effects research, the role of specific content is understudied, in part attributable to fact that communication science previously lacked methods access directly. Digital trace data (DTD) can shed light on textual and audio-visual use enable analysis usage a granular individual level has been unavailable. However, because digital are not specifically designed for research purposes, collection present several uncertainties. This article collaborative effort by scholars provide...
Growth curve modeling has become a mainstay in the study of development. In this article we review some flexibility provided by technique for describing and testing hypotheses about: (1) intraindividual change across multiple occasions measurement, (2) interindividual differences change. Through empirical example demonstrate how linear, quadratic, latent basis, exponential, multiphase versions model can be specified using commonly available SEM/multilevel software illustrate discuss results...
Throughout adulthood and old age, levels of well-being appear to remain relatively stable. However, evidence is emerging that late in life declines considerably. Using long-term longitudinal data deceased participants national samples from Germany, the United Kingdom, States, we examined how long this period lasts. In all 3 nations across adult age range, was stable over but declined rapidly with impending death. Articulating notions terminal decline associated death, identified prototypical...
The authors present in this study a damped oscillator model that provides direct mathematical basis for testing the notion of emotion as self-regulatory thermostat. Parameters from reflect individual differences emotional lability and ability to regulate emotion. discuss concepts such intensity, rate change, acceleration context emotion, they illustrate strengths approach comparison with spectral analysis growth curve models. utility modeling is illustrated using daily ratings 179 college...
Longitudinal data spanning 22 years, obtained from deceased participants of the German Socio-Economic Panel Study (SOEP; N = 1,637; 70- to 100-year-olds), were used examine if and how life satisfaction exhibits terminal decline at end life. Changes in more strongly associated with distance death than birth (chronological age). Multiphase growth models identify a transition point about 4 years prior where prototypical rate tripled -0.64 -1.94 T-score units per year. Further individual-level...
Using 12-year longitudinal data from deceased participants of the Berlin Aging Study (N ϭ 414; age 70 -103 years, at first occasion; M 87 SD 8.13), authors examined whether and how old very individuals exhibit terminal decline in reported life satisfaction end life.Relative to age-related decline, mortality-related (i.e., distance-to-death) accounted for more variance interindividual differences change revealed steeper average rates by a factor 2. By applying change-point growth models,...
Despite evidence that psychological stress is an important risk factor for age-related cognitive loss, little research has directly evaluated and physiological mediators of the relationship between stressful experiences function. A key objective ESCAPE (Effects Stress on Cognitive Aging, Physiology, Emotion) project to evaluate whether engaging in stress-related unconstructive repetitive thought (URT) a pathway through which negatively affect health over short- long-term. Over short-term, we...
Objective-Subjective well-being has well-established positive health consequences.During emerging adulthood, from ages 18 to 25 years, people's global evaluations of their (i.e., satisfaction with life [SWL]) appear worsen more than any other time in the adult lifespan, indicating that this population would benefit strategies enhance SWL.In these studies, we investigated top-down time-invariant, trait-like) and bottom-up time-varying, state-like) influences physical activity (PA) on daily...
Non-linear growth curves or that follow a specified non-linear function in time enable researchers to model complex developmental patterns with parameters are easily interpretable. In this paper we describe how variety of sigmoid can be fit using the Mplus structural modeling program and mixed-effects procedure NLMIXED SAS. Using longitudinal achievement data collected as part study examining effects preschool instruction on academic gain illustrate procedures for fitting models logistic,...
There is ample evidence to suggest that positive emotions lead valuable life outcomes. This study examines daily emotion development before, during, and after a leisure travel experience. The measured on basis in 25 mature adult participants two experiences. Consistent with the "peak" model previous research, overall—and joy interest particular—increased before travel, were elevated during declined afterward. Implications for practice include managing travel. Future research should consider...
Life span researchers have long been interested in how and why fundamental aspects of human ontogeny differ between cohorts people who lived through different historical epochs. When examined at the same age, later born are often cognitively physically fitter than earlier cohorts. Less is known, however, about cohort differences rate cognitive aging if, very end life, pervasive mortality-related processes overshadow minimize differences. We used data on 5 primary mental abilities from...
Individuals change over time, often in complex ways. Generally, studies of time have combined individuals into groups for analysis, which is inappropriate most, if not all, development. The authors explain how to identify appropriate levels analysis (individual vs. group) and demonstrate estimate changes developmental processes using a multivariate nonstationary series model. They apply this model describe the changing relationships between biological son father stepson stepfather at...
Physical activity is considered a valuable tool for enhancing life satisfaction. However, the processes linking these constructs likely differ across adult span. In older adults association between physical and satisfaction appears to involve usual levels of (i.e., between-person driven by differences more less active people). younger has consistently been based on day-to-day within-person days). To resolve this inconsistency, daily diary study was conducted with span sample...