151
This research can be categorized as descriptive survey research. The study population consisted of members of
web site that have been purchase form commercial websites at least one time. The study is used of
available random sampling. So that during the time of completing this research the questionnaire was distributed
to online Members. Sample size based on Cochran formula and standard deviation of 0.84389 that achieved from
sample, and the error of α ═ 0.0 5 was 275.
The data gathering instrument was a self administered questionnaire. All the items were measured using five-
point Likert scale items with anchor points 1 = strongly disagree and 5 = strongly agree. To analyze the
hypotheses of the study, one-sample τ-test has been used. To test the reliability of data gathering instrument, a
preliminary study has been conducted with a sample of 30. The results of the primary sample show that Cronbach
alpha (α) index is 0.8448 that indicate a good reliability. Also for testing the existence of linear relations between
variables, Pearson correlation was used. At first regression analysis was conducted on the main hypotheses.
Finally, to determine the extent of the effects of variables in each part (i.e. trust propensity, skill & experience,
information quality) on trust attitude, purchase behavior and repeat purchase behavior, regression analysis has
been used to examine the sub hypotheses.