• tamirmendel

Presenting my Ph.D. at the departmental seminar

Updated: Mar 12

I will give a seminar in the industrial engineering department at Tel Aviv University on Tuesday (8/3/2022). Before submitting my dissertation "Collective Online Safety Support for Older Adults." I have to present my work at the department seminar.


I will talk about how older adults face difficulties managing mobile security and privacy threats in rapidly changing technological environments. Many older adults do not meet these challenges alone, and they rely on family and friends for support and advice. I investigate how new methods based on Collective Efficacy Theory can enhance older adults’ support networks through technology to address mobile security and privacy challenges.


In this seminar, I will first provide the relevant background, including collective efficacy as a theoretical construct and existing technologies that care about online safety for older adults. I will review my research that utilizes online experiments, model fitting, and co-design sessions to understand how social technologies can support older adults in online safety problems. I will present a proactive support model for older adults that predicts moments when users might need online support. The study compared machine learning models to identify supportable moments and showed that the random forest method performs better than other models with an accuracy of 78%. I illustrate how the composition of age can affect how the sample impacts the model performance.

Finally, I will present Meerkat, a social support mobile application that helps older adults interact with mobile applications by receiving contextual support from friends and family or a community of volunteers. I summarize the seminar by suggesting a new theoretical model for collective efficacy in online safety that highlighted social groups rather than the individual user as our primary unit of engagement and analysis.

If you want to hear more about my work, you can talk with me in CHI 2022. I will present a live interactive demo in CHI 2022, and I hope to see you there 😁.

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