This paper proposes a new rating method for investigating Consumer Behavior, especially for the consumer survey about branded products. The new method, named “Fuzzy-set Concurrent rating method” (FCR-method), proposed by Oda(1993,1995), was developed by applying extended fuzzy logic.

  The FCR-method uses two mono-polar scales for one question. From the result of rating, special index value is derived and is expected to present the hidden psychological feelings of the subject, which is never measured by traditional rating method.

  By conducting the small test survey in Sweden, using the FCR-method, this study examines the usefulness of the integrated value I and the contradiction- irrelevance index C for analyzing the data obtained.

 The main purpose of this study is to know whether the FCR-method works as expected