A personal wearable EEG monitor (1) is adapted to be carried at the head of a person. The EEG monitor comprises an EEG sensor part having skin surface electrodes (3) for measuring EEG signals from said person. The EEG monitor comprises an EEG signal analyzer (5 5 ) adapted for having an EEG signal transferred from the EEG sensor part and adapted for monitoring the EEG signal. The EEG monitor (1) further comprises EEG stimuli controlling means adapted for performing at least one of the following: providing a stimulus to the person requesting the person to perform a stimuli creating act or identifying a stimuli creating ambient sound. The EEG monitor comprises EEG response detection means for identifying an induced response from the EEG signal caused by the stimuli and a classifier for deciding based on said induced response if the skin surface electrodes receive EEG signals.
