A method for assessing nerve fiber excitability is disclosed. The method comprises: arranging an electrode in contact with skin of a person; determining a first and a second threshold value based on a stimulation current pulse of a first and a second waveform, respectively; wherein said determining of the first threshold value and said determining of the second threshold value each comprises: repeatedly providing a stimulation current pulse of the first or second waveform, respectively, through the electrode, wherein a stimulation current strength is altered between repetitions; and receiving signals from an interaction element with which the person interacts, said signals from the interaction element providing an indication of the first threshold value or the second threshold value, respectively, corresponding to a stimulation current strength necessary to be perceived by the person; and determining at least one measure of psychophysical perception based on the determined first and second threshold values.
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