 In addition to this, it has been shown that expert listeners make more use of the option to listen to smaller sections of the signals under test repeatedly and perform more comparisons between the signals under test and the reference.In contrast to the naive listener who produce a preference rating, expert listeners therefore produce an audio quality rating, rating the differences between the signal under test and the uncompressed original, which is the actual goal of a MUSHRA-test.The MUSHRA guideline mentions several possibilities to assess the reliability of a listener.