In-Situ Intervention

An in-situ intervention is a technological or design feature that is invoked within a user's existing workflow and context, rather than requiring them to switch to a separate application or interrupt their current task. In accessibility research, in-situ interventions are particularly valuable because they minimize the cognitive load and disruption associated with adopting new tools, allowing users to access additional functionality — such as AI result verification or camera aiming assistance — while remaining in familiar applications. The concept draws on HCI research methods such as Piggyback Prototyping and browser extensions, extending them to mobile assistive technology contexts where interrupting existing workflows may have significant usability costs for users who rely on structured, learned interaction patterns.