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Makale Özeti:
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The web is playing a central role in distance education. The word “usability” is usually
synonymous with functionality of the system for the user. Also, usability of a website is
defined as something that can be used by a specific group of people to carry out
specific objectives in an effective way, with efficiency and satisfaction. There are some
useful usability evaluation instruments of websites in other languages. The aim of this
study was to develop a Persian instrument to evaluate usability in distance education
websites. This study was a methodology research design.
According to review literature, the main structure of evaluation instrument for usability
designed. It was consisted of forty-eight items divided in 8 domains. Each domain was
composed of closed multiple choice questions in which an ordinal scale with three
values is used (always, sometimes and never) that measures the opinion of the
evaluator about the frequency of visiting each item selected in the website.
After that, we used face validity method. It refers to what instrument appears
superficially to measure. At the final step, we omputed a formal content validity index
(CVI) across the experts’ ratings of each item’s relevance. The content validity index
was measured by set of ten experts, who evaluated each item individually. According
to CVI, the final version of instrument was composed of 40 questions divided into 8
domains: Navigation, Functionality, Feedback, Control, Language, Consistency, Error
prevention and correction, and Visual clarity.CVI score for each phrase was more than
0.75. According to our findings, this instrument has enough validity to apply in
evaluation usability of educational websites of Persian distance education websites.
However, instrument reliability can be measured in further study.
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