Longitudinal Association of Microaneurysm Wall Characteristics with Perfusion and Local Neuroretinal Pathology

This chapter provides a nontechnical review of new statistical methodology for longitudinal data analysis that has been published in statistical journals in recent years. The methodology has applications in four important areas: (1) conducting variable selection among many highly correlated risk factors when the outcome measure is zero-inflated count; (2) characterizing developmental trajectories of symptomatology using regression splines; (3) modeling the longitudinal association between risk factors and substance use outcomes as time-varying effects; and (4) testing measurement reactivity and predictive validity using daily process data. The excellent statistical properties of the methods introduced have been supported by simulation studies. The applications in alcohol and substance abuse research have also been demonstrated by graphs on real longitudinal data.

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INTERNET USE AND LONELINESS OF OLDER ADULTS OVER TIME: THE MEDIATION EFFECT OF SOCIAL CONTACT

Innovation in Aging ◽

10.1093/geroni/igz038.697 ◽

2019 ◽

Vol 3 (Supplement_1) ◽

pp. S194-S194

Author(s):

Kexin Yu ◽

Shinyi Wu ◽

Iris Chi

Keyword(s):

Older Adults ◽

Older People ◽

Internet Use ◽

Social Contact ◽

Total Effect ◽

Mediation Effect ◽

Health And Retirement Study ◽

Longitudinal Association ◽

Retirement Study ◽

Over Time

Abstract Internet is increasingly popular among older adults and have changed interpersonal interactions. However, it remains controversial whether older people are more or less lonely with internet use. This paper tests the longitudinal association of internet use and loneliness among older people. One pathway that explains the association, the mediation effect of social contact, was examined. Data from the 2006, 2010 and 2014 waves of Health and Retirement Study was used. Hierarchical liner modeling results showed internet use was related to decreased loneliness over 12-year period of time (b=-0.044, p<.001). Internet use was associated with more social contact with family and friends overtime (b=0.261, p<.001), social contact was related to less perceived loneliness longitudinally (b=0.097, p<.001). The total effect of internet use on loneliness is -0.054 and the mediated effect is -0.025. The findings imply that online activities can be effective for reducing loneliness for older people through increased social contact.

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Mechanisms of Moral Disengagement in the Transition from Cybergossip to Cyberaggression: A Longitudinal Study

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18031000 ◽

2021 ◽

Vol 18 (3) ◽

pp. 1000 ◽

Cited By ~ 1

Author(s):

Daniel Falla ◽

Rosario Ortega-Ruiz ◽

Eva M. Romera

Keyword(s):

Longitudinal Study ◽

Young People ◽

Moral Disengagement ◽

Risky Behaviour ◽

Online Bullying ◽

Final Sample ◽

Longitudinal Association ◽

Online Behaviour ◽

Responsible Behaviour ◽

Fine Distinction

The internet is an area where young people establish relationships and develop socially, emotionally and morally, but it also gives rise to certain forms of online behaviour, such as cybergossip, which are associated with cyberaggression and other risky behaviour. The aims of this study were to verify whether a longitudinal association exists between cybergossip and cyberaggression, and to discover which mechanisms of moral disengagement may mediate this relationship. The final sample consisted of 1392 students (50% girls; Mage = 13.47; SD = 0.77), who were surveyed in a three-wave longitudinal study at six-month intervals. The results obtained confirmed a direct, positive relationship between cybergossip, subsequent cyberaggression and the mediation exerted by cognitive restructuring in this transition. We discuss the importance of recognizing and detecting the fine distinction between online gossip and cyberaggression with the intention of doing harm, and focus on the justifications used by young people to normalize online bullying. To sum up, there is a clear need to encourage ethical, responsible behaviour in online interactions in order to achieve well-balanced, more sustainable relationships in classrooms.

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