A method for adjusting a hearing system to the hearing preferences of a user of said hearing system is disclosed, wherein said hearing system is capable of carrying out frequency transposition of audio signals, which frequency transposition depends on at least one parameter. The method comprises the steps of A) carrying out a distinction test for examining said user's ability to distinguish between two stimulus signals which differ in their frequency contents; B) adjusting said at least one parameter in dependence of the result of said distinction test. The distinction test comprises the steps a2) consecutively playing said two stimulus signals to said user; b2) receiving from said user information indicative of whether said user perceived said two stimulus signals as two times the same sound or as two different sounds; c2) deriving a value from said information received from said user; wherein said result of said distinction test is dependent on said value.