Detection approach
Mouse path linearity is over 0.90. Human movement follows Fitts's Law with curved acceleration/deceleration arcs. Perfectly linear paths are a signature of programmatic mouse event injection (Selenium ActionChains, Puppeteer mouse.move).
How this helps detect bots
Collect this signal alongside session context, request metadata, and other independent indicators. A single anomaly is a lead, not a verdict; corroborating anomalies make automated traffic more likely.
Legitimate traffic to consider
Digital artists or designers operating the site using Wacom drawing tablets or styluses.
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