What is the reported lab versus field accuracy for EEG brain fingerprinting?

• A. Lab 70-80%, field 50%
• B. Lab 85-95%, field near chance
• C. Lab 95-100%, field 80-90%
• D. Lab 60-70%, field 40-50%

Answer: (B)

The key idea is that EEG brain fingerprinting tends to perform well in tightly controlled lab conditions but falls off in real-world field settings. In the lab, the signals are cleaner, the protocol is strictly followed, and artifacts are minimized, so accuracy for distinguishing individuals falls in the mid-to-high 80s up to the mid-90s. In field conditions, however, noise from movement, electrode impedance changes, distractions, and less control over stimuli dramatically reduce reliability, pushing performance toward chance rather than a high level of accuracy. That pattern matches the option stating lab accuracy around 85-95% and field accuracy near chance, making it the best choice. The other options imply unrealistically high field performance or unusually low lab performance, which don’t align with how EEG brain fingerprinting typically behaves under real-world conditions.