摘要：A library website plays an enhanced role compared to its traditional physical library while providing awide variety of library services to its users. Evaluation of library websites is a key to realize the extent of useracceptance to the website and to improve overall quality of website. Usability is a highly recognized factor todetermine how easy to use the website. The models of usability evaluations evaluate the ease of use of websiteoperations and see whether the users can perform their tasks competently. Moving on further, this study has beenundertaken in context of library websites in Sri Lanka with the main purpose of exploring the relations betweendifferent dimensions of website usability and their impact. The study first investigated the common dimensions ofwebsite usability together with instrument items to measure dimensions by integrating the findings of an extensiveliterature review as well as discussions with local experts. The measurement instrument was then empiricallyvalidated its reliability and validity for the Sri Lankan library system with the aids of actual library users in SriLanka. Descriptive statistics methods and structural equation modelling techniques were applied. The proposedusability evaluation model consisted of the seven dimensions and two to three measurement items for eachdimension. It is expected that this model can be used as a library website usability evaluation tool to evaluate thestrengths and weaknesses of the website and update the website performance up-to-date.
关键词：Library website; performance evaluation; SEM; usability evaluation; web usability.
