That's where its algorithms come in, what Fitbit's stress tracking will in truth live or die on, but the company does have some assistance from the other sensors on board.īoth HRV and skin temperature can be sensitive indicators of stress – skin temperature decreases in cases of stressful events from an average of 32 to 35◦C. "Unfortunately happy stress responses like 'I just got engaged' and the really negative stress responses like 'I'm watching a really terrifying movie' can actually generate similar physiological reactions," says Friedman. A major barrier to the usefulness of EDA in real life scenarios, that is presented in the research, is the step in the process in which the stressful, sweat-producing 'event' is categorised into a positive or negative stressor. Eric Friedman, co-founder and CTO of Fitbit is more concerned with the analysis and presentation of the stress and emotion data.
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