According to the Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology, the minimum data length for heart rate variability (HRV) analysis is 5 minutes. This is because HRV is considered to be a relatively slow process, and a 5-minute recording is long enough to capture enough data to perform meaningful analysis. Whereas socioeconomic games like ultimatum games the trial lengths are in seconds and people have analysed HRV on as low as 6 seconds of data (https://www.nature.com/articles/srep44471). I would like to know what experts have to say.

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