Related Experiment Video
Updated: Jan 30, 2026

Predicting Gene Silencing Through the Spatiotemporal Control of siRNA Release from Photo-responsive Polymeric Nanocarriers
Published on: July 21, 2017
Predicting Control Beliefs in Older Adults: A Micro-Longitudinal Study.
Shenghao Zhang1, Alyssa A Gamaldo2, Shevaun D Neupert1
1Department of Psychology, North Carolina State University, Raleigh.
Older adults’ control beliefs fluctuate daily. Improved sleep self-efficacy and positive emotions enhance control, while daily stressors can decrease it, impacting well-being.
Area of Science:
- Psychology
- Gerontology
- Behavioral Science
Background:
- Control beliefs, including locus of control and perceived competence, are crucial for older adults' well-being.
- Understanding daily fluctuations in these beliefs is essential for targeted interventions.
Purpose of the Study:
- To investigate daily variations in older adults' control beliefs.
- To identify predictors of intra-individual differences in locus of control and perceived competence.
Main Methods:
- A micro-longitudinal design was employed with 205 older adults (aged 60-94).
- Participants completed 8 in-person sessions over 3 weeks, assessing control beliefs, health, stressors, affect, and cognition.
Main Results:
- Higher daily sleep self-efficacy, positive affect, and lower negative affect predicted greater internal locus of control and perceived competence.
- Previous day stressors were linked to lower subsequent locus of control.
- Physical symptoms, everyday cognition, and memory failures showed predictive potential for locus of control.
Conclusions:
- Sleep self-efficacy and affect are key daily antecedents of control beliefs in older adults.
- The study highlights differentiated antecedents for locus of control and perceived competence.
- Future research should explore well-being and cognition's role in control belief antecedents.
Related Concept Videos
Longitudinal Research
Longitudinal Studies
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
Predicting Molecular Geometry
Prediction Intervals
However, the point estimate is most likely not the exact value of the population parameter, but close to it. After calculating point estimates, we construct interval estimates, called confidence intervals or prediction intervals. This prediction interval comprises a range of values unlike the point estimate and is a better predictor of the observed sample value, y.
End Point Prediction: Gran Plot
For potentiometric titration, the Gran plot is created by plotting...

