Within the domain of online health care information, the purpose of this study was: (1) to examine changes in the evaluation of expressive and classical aesthetics on the same site across exposure times, (2) to test whether the evaluation of classical and expressive aesthetics across exposures changes between different "modes", (3) to examine whether credibility has a relationship with expressive or classical aesthetics as well as any fluctuations across exposure times.

The results from this thesis indicate that expressive and classical aesthetics are positively correlated across exposure times, while also having a significant mean difference across exposure times. Evidence for the positive influence of mode of use in providing more reliable judgments were not found. Lastly, credibility was found to have a positively correlated relationship with expressive and classical aesthetics across brief, self-paced, and usage exposure times.