Usability of Koha Online Public Access Catalogue during information retrieval with regard to interface design

Abstract The aim of this study is to analyze objectively the usability of Koha Online Public Access Catalogue during information retrieval with regard to its interface design. The study adopted a descriptive survey design. Quantitative method was used in the survey to analyze the usability of Koha OPAC based on its interface design. Quantitative data was collected using Post-Study System Usability Questionnaire (PSSUQ). The study location was Technical University of Kenya Library, located in Nairobi City. The study used a stratified random sampling technique which assisted the researcher to determine users who required training in the use of Koha OPAC prior to a usability test. The population of undergraduate users was subdivided into two mutually exclusive segments based on the use of Koha OPAC for information retrieval. Users who had undergone OPAC instruction were categorized as experienced users whereas users who had never been trained were categorized as beginners. To achieve categorization, a pre-session interview questionnaire was administered to participants prior to data collection. The researcher was able to administer a usability test on participants in order to analyze whether the interface of Koha OPAC facilitated information retrieval. This study established that although most patrons were able to use icons Koha OPAC to navigate the interface, a few participants cited poor visibility and a lack of clarity of the icons which impeded their navigation hence hindering effective usability of Koha OPAC for information retrieval.