Problematic use of short-video apps among elderly adults: An extension of the TAM

Short-form videos have become a dominant form of social media globally. While short-video apps are popular among adolescents, their ease-of-use has also attracted a growing number of elderly users. However, this accessibility can lead to problematic use, resulting in physical and mental health issues for this demographic. Therefore, our research employed the technology acceptance model (TAM) to understand the problematic use of short-video apps (PUSVA) among elderly adults. 281 elderly adults completed a three-wave survey with a 1-month interval between waves. Results showed that both perceived utilitarian-usefulness and perceived hedonic-usefulness mediated the relationship between perceived ease-of-use and PUSVA, suggesting a double-edged sword effect of ease-to-use short-video apps. Moreover, perceived susceptibility moderated the relationship between perceived ease-of-use and perceived utilitarian-usefulness, but not between perceived ease-of-use and perceived hedonic-usefulness, suggesting a moderated mediation effect of perceived susceptibility on PUSVA. Specifically, elderly adults with low perceived susceptibility tended to report higher perceived utilitarian-usefulness for easy-to-use applications, while no relationship between perceived ease-of-use and perceived utilitarian-usefulness was observed among those with high perceived susceptibility. Our findings highlight the double-edged sword effect of user-friendly short-video apps and offer valuable insights for developing interventions to mitigate problematic use among elderly adults.