This study was undertaken to determine if the credibility principle of attitude change applied
in the multi-variable context of a team-taught education methods course. Defined as respondent
perceptions of communicator expertise and trustworthiness credi- bility is believed to be the
probable producer of attitude changes. Six education team members functioned as independent
variables while the dependent variables consisted of preservice teacher attitudes toward
science and science teaching as well as perceptions of team member credibility and attitudes.
Three principal team members were perceived as being most credible. Repeated measures on the
dependent variables increased toward the perceived levels of the principal educators. Results
of this study support the credibility principle in general but additional findings indicate
that credibility alone is not the probable producer of attitude changes.
