Journal of Systems and Information Technology

Nazrul Islam, Muhammad ; Tétard, Franck

2014 Journal of Systems and Information Technology

doi: 10.1108/JSIT-03-2014-0019

Purpose – The purpose of this empirical study was to address two important concerns of Web usability: how user-intuitive interface signs affect Web usability and how applying semiotics (i.e. the doctrine of signs) in user interface (UI) design and evaluation helps to improve usability. Design/methodology/approach – An empirical research approach is followed here to conduct three user tests. These tests were conducted on a Web application with 17 test participants. Data were gathered through laboratory-based think-aloud usability test, questionnaires and interviews. Following an empirical research approach, statistics and user behavior analysis were used to analyze the data. Findings – This study explores two important concerns of UI design and evaluation. First, users’ interpretation accuracy of interface signs impact on Web usability. The study found that users’ interpretation of signs might be accurate, moderate, conflicting, erroneous or incapable; user-intuitive interface signs led participants to interpret signs’ meaning accurately; and users’ inaccurate interpretation of one or a few task-related interface sign(s) led users to usability problems, resulting in participants performing tasks with lower task-completion performance. Second, considering semiotics perception in UI design and evaluation is important to improve Web usability. This study showed that interface signs, when re-designed considering the semiotics guidelines, have increased the end-users’ interpretation accuracy and the interface signs’ intuitiveness. This study also provides a small set of semiotics guidelines for sign design and evaluation. Originality/value – This study empirically demonstrated that signs’ intuitiveness impact on Web usability and that considering the semiotics perception in sign design and evaluation is important to improve Web usability. These outcomes are valuable in a number of ways to HCI researchers and practitioners: the results provide awareness of the importance of user-intuitive interface signs in UI design; practitioners can easily adopt the concept of interpretation accuracy classification to conduct a sign test to obtain an “overall impression of interface signs’ intuitiveness”; practitioners can easily adopt the methodological approach followed in this study to conduct usability test without additional resources; and the results raised important fundamental questions for future research such as “what does a practitioner need to be aware of when designing or evaluating interface signs?”

Holmes, Kate ; Greenhill, Anita ; McLean, Rachel

2014 Journal of Systems and Information Technology

doi: 10.1108/JSIT-05-2013-0018

Purpose – The purpose of this study is to gain insight into craft and do-it-yourself (DIY) communities of practice (COPs) and how the use of technology provides ways for participants to connect, share and create. Gaining deeper insights into the practices of these communities may provide new opportunities to utilise within this flourishing domain. Design/methodology/approach – Qualitative methods were adopted to collect data and analysed through an interpretivist lens. Semi-structured interviews were conducted with members of craft and DIY COPs to gain a deep understanding of the broader ethnographic study. Existing theoretical perspectives surrounding COPs have been applied to further current perspectives. Findings – Findings from this study suggest that being part of a COP allows participants to connect to others, build creative enterprise and learn or enhance skills. Insights gained from this study indicate some of the detailed ways in which the application of technology redefines craft and DIY COPs. Research limitations/implications – This study provides a succinct exploration of a vast and fluid domain; if presented with more time and wider resources, the research would include further exploration of virtual COPs. Originality/value – The investigation provides a rich insight into the use of information and communication technologies (ICTs) within craft and DIY COPs. The application of theoretical perspectives from the area of Information Systems (IS) and Technology Management to this domain is regarded as an original research and furthers knowledge in these areas. Originality/value – The investigation provides a rich insight into the use of ICTs within craft and DIY COPs. The application of theoretical perspectives from the area of IS to the domain of craft and DIY culture is original research and extends existing concepts to include skills sharing as a previously unexplored domain.

D. Tomasi, Stella

2014 Journal of Systems and Information Technology

doi: 10.1108/JSIT-01-2014-0003

Purpose – The purpose of this paper was to study users’ behaviour when using different search engine results pages (SERPs) to identify what types of scents (cues) were the most useful to find relevant information to complete tasks on the Web based on information foraging theory. Design/methodology/approach – This study has designed three interface prototypes and conducted a qualitative study using the protocol analysis methodology. The subjects were recorded and videotaped to identify patterns of searching behaviours on visualization interfaces of SERPs. Findings – The study found that users found titles of categories or websites, keywords of categories, orientation of results and animation are strong scents that users follow to help find information on SERPs. If certain scents are not used followed on an interface, then their strength will diminish. Furthermore, the study showed that simple scent trails are more important to users than complicated trails. Originality/value – This study uses a qualitative approach to explore how users behave with different SERP formats, particularity a visualization format, and identify which scents on the interface are important for users to follow to successfully complete tasks on the Web.

N. Karanikolas, Nikitas ; Vassilakopoulos, Michael

2014 Journal of Systems and Information Technology

doi: 10.1108/JSIT-05-2014-0034

Purpose – The purpose of this paper is to compare the use of two Object-Relational models against the use of a post-Relational model for a realistic application. Although real-world applications, in most cases, can be adequately modeled by the Entity-Relationship (ER) model, the transformation to the popular Relational model alters the representation of structures common in reality, like multi-valued and composite fields. Alternative database models have been developed to overcome these shortcomings. Design/methodology/approach – Based on the ER model of a medical application, this paper compares the information representation, manipulation and enforcement of integrity constraints through PostgreSQL and Oracle, against the use of a post-Relational model composed of the Conceptual Universal Database Language (CUDL) and the Conceptual Universal Database Language Abstraction Level (CAL). Findings – The CAL/CUDL pair, although more periphrastic for data definition, is simpler for data insertions, does not require the use of procedural code for data updates, produces clearer output for retrieval of attributes, can accomplish retrieval of rows based on conditions that address composite data with declarative statements and supports data validation for relationships between composite data without the need for procedural code. Research limitations/implications – To verify, in practice, the conclusions of the paper, complete implementation of a CAL/CUDL system is needed. Practical implications – The use of the CAL/CUDL pair would advance the productivity of database application development. Originality/value – This paper highlights the properties of realistic database-applications modelling and management that are desirable by developers and shows that these properties are better satisfied by the CAL/CUDL pair.