It was presented through headphones (SPL 60–70 dB) while listeners sat in a reclining chair with their eyes closed. In order to become familiar with the testing procedure prior to the real test a short trial of 5 items was presented to the subjects. When finished with testing all respondents were asked to close their eyes and relax. During this period the respondents’ resting EEG was recorded. This resting EEG was used to determine the mean α peak frequency (IAF) – which was used as an individual anchor point to determine the α narrow frequency bands.