The purposes of this study were 1) to analyze the correlation between Word-of-Mouth(WOM) message sender credibility and WOM effect and 2) to analyze the differences of WOM message sender creadibility and WOM effect in off-line and on-line WOM communication. The messages were created as a form of scenario for this study. Respondents were asked to evaluate the message sender credibility and predict WOM behaviors after reading given scenario. The questionnaires were distributed to 200 customers and a total of 175 questionnaires were used for analysis(87.5%). The statistical analysis was conducted using SPSS Win(12.0) for descriptive analysis, paired t-test, factor analysis, correlation analysis. The positive off-line WOM message sender was considered as more credible(p<.001) than on-line WOM message sender. 'Message sender credibility' is correlated with 'attitude formation' in both channels, but 'reliable' factor of 'credibility' variable is not significantly correlated with 'attitude change'.

The hearsay rule was introduced into the Criminal Procedure Law by the Act No. 705, Sep. 1, 1961 in Korea. Any document which contains statements in place of the statements made at the preparatory hearing or at the public trial shall not be admitted as evidence of guilt except as provided by a few articles of the Criminal Procedure Law(§310-2). The investigation report which contains statements of witnesses prepared by the public prosecutors or by the judicial police officers may be introduced into evidence if the genuineness thereof is established by the person who made original statements at the preparatory hearing or at the public trial(§312 (1), §313 (1)). If the witnesses are unable to be present or to testify at the preparatory hearing or at the public trial because of death, sickness, residing abroad or other reasons, the recorded statements of witnesses are not excluded by the hearsay rule(§314). And the probative value of evidence shall be left to the discretion of the judges(§308). Recently the innovative reformation of trial has been the hottest issue and the Criminal Procedure Law is amended by the Act No. Apr. 30, 2007. During that turmoil the Supreme Court ruled that even though the admissibility of recorded statements of witnesses is accepted on the basis of agreement between adversarial parties(§318), the credibility of those statements is extremely restricted in the case the confrontation right of the defendant is limited. The witness-investigation report may have probative values when the recorded statements are so accurate that they are self-evident or if other evidences collaborate the reliability of the recorded statements.