In order to obtain a sample size-to-estimated parameter
ratio greater than five and reliable parameter estimates
(Bentler and Chou, 1987), the psychometric properties of the
measures were examined by estimating three measurement
models. The first confirmatory factor analysis included the
measures of layout and functionality (usability, relevance of
information, customization, and interactivity). The second
measurement model included measures relating to aesthetic
appeal (originality of design, visual appeal, and entertainment
value) as well as the extent of trust in the web site). The final
model included measures financial security (perceived
security and ease of payment) as well as the measure of
purchase intentions.