211 research outputs found
Technologie en gedragsverandering bij ouderen
No full textTechnologie wordt steeds vaker ingezet, maar werkt het ook? Sumit Mehra legt uit hoe wetenschappelijke inzichten vertaald kunnen worden naar een blended aanpak om gedragsverandering te realiseren. Hij licht dit toe aan de hand van het VITAMINE project waarbij ouderen met behulp van een tablet en e-coaching worden ondersteund om thuis een functioneel oefenprogramma te volgen dat is toegesneden op de individuele situatie
Tailored interactive technology for a healthy lifestyle
No full textDuring the persuasive technology symposium, Marije Deutekom - Baart de la Faille and colleagues organised a symposium session with 4 presentations: • Presentation 1: A home based exercise program: are older adults able to use mHealth technology? (Sumit Mehra). • Presentation 2: Promoting healthy diet and physical activity in children through the use of games: bridging the gap between industry and science (Monique Simons). • Presentation 3: Increased motivation for exercise through exercise apps such as BAMBEA (Joey van der Bie & Nicky Nibbeling) • Presentation 4: Which factors are important for effectiveness of sport- and health-related apps? Results of focus groups with experts (Joan Dallinga)
Development and evaluation of a blended home-based exercise intervention for older adults
No full textAging is associated with a decline in the ability to carry out daily tasks. Physical activity can delay or diminish the decline and increase the ability of older adults to live independently at home. Performing home-based exercises can help older adults achieve the recommended levels of physical activity. Technology allows exercise programs to be tailored to individual needs. This thesis describes a blended intervention that was developed and evaluated according to the Medical Research Council framework. The principal findings are that older adults are motivated to perform technology-supported home-based exercises if they help them maintain self-reliance and there is sufficient guidance, safety is taken into account, and adherence is stimulated. To meet those conditions, a blended intervention was developed that was based on functional exercises, behavior change theory and human guidance. A custom-made tablet application appears to be usable by the target audience. A process evaluation has shown that the tablet as well as the coach support older adults in the various phases of self-regulating their exercise behavior. The blended intervention stimulates intrinsic motivation by supporting the autonomy of participants, fostering competence and, for some, meeting the need for relatedness by offering emotional support. Data derived from the tablet demonstrate that older adults participating in the intervention exhibit exercise behavior that is in line with WHO guidelines and that engagement with the tablet was a contributing factor. Future work should include assessment of intervention fidelity and explore which aspects of coaching can and cannot be further automated
Harnessing the potential of persuasive technology: getting older adults to exercise more with a blended intervention
No full textHarnessing the potential of persuasive technology:: Getting Older Adults to Exercise at Home with a Blended Intervention
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Essays in Finance and Macroeconomics: Household Financial Obligations and the Equity Premium
No full textabstract: This dissertation is a collection of three essays relating household financial obligations to asset prices. Financial obligations include both debt payments and other financial commitments.
In the first essay, I investigate how household financial obligations affect the equity premium. I modify the standard Mehra-Prescott (1985) consumption-based asset pricing model to resolve the equity risk premium puzzle. I focus on two channels: the preference channel and the borrowing constraints channel. Under reasonable parameterizations, my model generates equity risk premiums similar in magnitudes to those observed in U.S. data. Furthermore, I show that relaxing the borrowing constraint shrinks the equity risk premium.
In the Second essay, I test the predictability of excess market returns using the household financial obligations ratio. I show that deviations in the household financial obligations ratio from its long-run mean is a better forecaster of future market returns than alternative prediction variables. The results remain significant using either quarterly or annual data and are robust to out-of-sample tests.
In the third essay, I investigate whether the risk associated with household financial obligations is an economy-wide risk with the potential to explain fluctuations in the cross-section of stock returns. The multifactor model I propose, is a modification of the capital asset pricing model that includes the financial obligations ratio as a ``conditioning down" variable. The key finding is that there is an aggregate hedging demand for securities that pay off in periods characterized by higher levels of financial obligations ratios. The consistent pricing of financial obligations risk with a negative risk premium suggests that the financial obligations ratio acts as a state variable.Dissertation/ThesisDoctoral Dissertation Economics 201
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