What age groups do you recommend using this device? Is EDA different per age group? Gender? Nationality? Time of the day?

Currently the Q Sensor is being used for various studies that involve people from all age groups including infants. We do not recommend use on newborns or on premature infants where the skin is still developing and may be highly sensitive.

EDA differences have sometimes been reported for different age groups (lower skin conductance for many older people with drier skin, although this is not always the case for every participant) and occasionally for gender differences, although in most of our work we have not seen gender differences. Remember that most studies in the literature were before the invention of the Q sensor and thus were only for short-term measurement; their results may no longer hold now that large numbers of people are can be measured properly long term. New normative data is needed to see if the old results (from short-term lab measurement) hold up.

EDA has been reported in some studies to show a circadian cycle, in infants and in college students.