For my experiment participants are assigned to two different groups while they to a Go/NoGoTask. I recorded the EDA via electrodes attached on the left hand and now I wanted to compare the SCL between the groups.
Of course, I could just compare the "raw" SCL data, but shouldn't I do some kind of range correction too? But if I do that e.g. following the recommendation of Lykken and Venables (1971), wouldn't I dimminish any group differences?
best,
Katharina
There is really not enough information presented to adequately answer your question. However, assuming that the recorded data has been properly calibrated there should be no harm in comparing the raw data (signals) directly. At least you would have an estimation of group effect.
In stead of asking these questions you could also do both and see what your results tell you
Dear Katharina: to properly answer your question I would need further information about the experimental design you used and the main hypothesis you posed. In any case, skin conductance usually requires some pre-processing steps before you actually analyze your data set. Since this would take too long to explain in detail, I'm attaching a recently published paper that might come as handy. Hope that it helps.
Interesting question. I am also looking for an answer. I guess zscoring will diminish any group differences, but zscoring from baseline might work.
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