Can wearable usage be reliably verified through continuous heartbeat signal presence?

Type: Signal integrity and usability study
Status: In Progress

This program isolates the Usability Engine as the sole validation layer, evaluating whether a wearable device is actively being used during data collection. Rather than assuming device attachment, the system measures continuous heartbeat signal presence as direct evidence of physiological engagement.

The objective is to distinguish passive data recording from genuine wearable use. Sustained and coherent heartbeat signals indicate that the device is being worn and functioning correctly, while signal gaps, instability, or absence indicate partial or invalid usage.

In this configuration, credit attribution is based exclusively on verified usability. Each minute with valid heartbeat coverage is considered eligible, independent of movement classification.

This program establishes the boundary between device activity and true wearable usage, defining a measurable standard for usability that can be applied consistently across datasets.