The Pen: Episodic Cognitive Assistance via an Ear-Worn Interface
2026-03-06 • Human-Computer Interaction
Human-Computer Interaction
AI summaryⓘ
The authors look at wearable AI devices that you can turn on and off easily instead of needing to be on all the time. They made a device called The Pen, which you wear on your ear and looks like a pen, to help with short tasks when you ask for help. Their study found that having clear on/off rules for using the device helps people feel in control, stay focused, and feel more comfortable around others. This approach respects privacy and reduces disruption during social interactions.
wearable AIepisodic usecognitive assistanceform factorvoice interactionvisual contextlocal processinguser agencysocial comfort
Authors
Yonatan Tussa, Andy Heredia
Abstract
Wearable AI is often designed as always-available, yet continuous availability can conflict with how people work and socialize, creating discomfort around privacy, disruption, and unclear system boundaries. This paper explores episodic use of wearable AI, where assistance is intentionally invoked for short periods of focused activity and set aside when no longer needed, with a form factor that reflects this paradigm of wearing and taking off a device between sessions. We present The Pen, an ear-worn device resembling a pen, for episodic, situated cognitive assistance. The device supports short, on-demand assistance sessions using voice and visual context, with clear start/end boundaries and local processing. We report findings from an exploratory study showing how layered activation boundaries shape users' sense of agency, cognitive flow, and social comfort.