There is provided a system comprising a cochlear implant device (10) and a screening device (13) communicating with the Ci device, the CI device comprising: an electrode array (19) comprising a plurality of stimulation electrodes (18) to be implanted in a patient's cochlea (200) for electrical stimulation of the cochlea, a stimulation signal unit (48, 54} for generating stimulation signals to be supplied to the stimulation electrodes, a unit (14, 19, 24) for capturing ECAP signals induced at the electrodes in response to stimulation of the cochlea by applying stimulation signals to the electrodes； the screening device being adapted to cooperate with stimulation signal unit in a manner so as to provide the electrodes with stimulation signals suitable for conducting growth function measurements, recovery measurements and spread-of-excitation measurements, and being adapted to estimate, for at least part of the electrodes, the threshold current level required for achieving an ECAP-signal based on interpolated growth function measurements of the ECAP-signal at at least four different current levels； to conduct recovery measurements for at least some of those electrodes for which an ECAP level of at least 100μν was measured in the growth function measurements, the recovery measurements comprising ECAP measurements at constant current level as a function of an interpulse interval of the stimulation signal in order to obtain a recovery function for each of the recovery-measured electrodes, and obtain a recovery time constant for each of the recovery-measured electrodes from an exponential fit of the respective recovery function； and to conduct a spread-of-excitatton (SOE) measurement for at least some of those electrodes for which an ECAP level of at least ΙΟΟμν was measured in the growth function measurements, wherein the stimulation current is applied subsequently only to one of the electrodes as the probe electrode while an ECAP level is measured subsequently at each of
