Purpose: This article outlines the rationale and development process for an online intervention based on vestibular rehabilitation therapy (VRT). The intervention aims to assist adults aged 50 years and older t o self-manage and reduce dizziness symptoms.
Method: The intervention was developed according to the person-based approach to digital intervention design focused on accommodating perspectives of target users. A prototype version of the intervention was provided to 18 adults (11 women, 7 men) aged 50 years and older with dizziness. These adults were invited to use the intervention over a 6-week period and, during this time, took part in a think-aloud session. This session sought to understand users' perceptions of how acceptable, engaging, and easy to use they found the online intervention.
Results: Users were extremely positive regarding how easy to navigate, visually appealing, and informative they found the intervention. Think-aloud sessions provided valuable data for informing small amendments to further enhance acceptability of the intervention for target users.
Conclusions: Informed by these development-phase data, a finalized version of the intervention is now being investigated in a primary care-based randomized controlled trial. Results should provide an understanding of whether VRT can be effectively-especially, cost-effectively-delivered via an online intervention to adults aged 50 years and older.