CogTool Essay Example | Topics and Well Written Essays - 1250 words

CogTool - Essay Example The types of modeling techniques used are AI and cognitive modeling. Examples of modeling are the following: Sisyphus, Project Halo, Ambr. Project and Predicting Cognitive Performance. The differences existing in the models depend on the person’s or team’s modeling approach. Predictions related to similar performing model take place because of a similar approach which remains unknown. Comparison of modelers relies on approaches used to predict time that is spent by skilled performers on the various user interfaces (UIs). Heuristic estimation techniques are compared to predictive human performance modeling approach, the Keystroke-Level Model (KLM). Method of Study The KLM approach was compared with data from 19 novice modelers in building two UIs tasks. The data was published originated from 8 novice modelers. The variance for the data collected was approximately 20%. This evaluator effect in Human-Computer Interaction (HCI) is revealed in various techniques of HCI. The 20% evaluator effect for all the techniques faced critics on use in KLM modeling technique because of its assumption that it predicted accuracy of 20%. The differences in modeler techniques are based on expected accuracy that emphasizes on behavior representation community. Attempts to reduce variation in modelers are provided for by tool-support for KLM analyses. The human-centered design (HCD) techniques used created CogTool, a tool to construct valid KLMs. Error Detection Detection for systemic errors was done on examination of eight KLM novice modelers. 87 operators were compared with inclusion of KLM created. Many common errors were detected. Overt steps essential for task operation were left out. Accurate follow up of the Ks, Ps, and Hs in KLMs was impossible, making the task unsuccessful. 88% of modelers experienced this error. 38% of the novice modelers included extra overt operators unnecessary for the task. The novice modelers experienced difficulties in applying Moran and Newell’s heuristics when placing M operators. This was characterized by uneven placing of Ms in the models. The errors discovered were analyzed through human centered design techniques that prompted design of CogTool (Bonnie). Results of Research: CogTool Project CogTool project allows UI designers to predict human performance modeling techniques analyze ideas in design from a quantitative approach before implementing ideas on resource investment. Error analysis mentioned was used as a guideline in design of CogTool project so that the errors identified could be eliminated to the utmost. Contextual inquiry was used to understand the challenges faced by modelers and the success of the project in suiting the workflow and culture of UI designers. Competitive analysis was used to assess what had been tried. Results obtained were considered in design of the project. Continuous analysis has made the tool of importance in today’s real-world design and evaluation processes. T his success enables it to be taught to HCI, UI design and Human Factor students. Using CogTool The procedure for KLM in CogTool is different from KLM done by hand. UI design is modeled on a graphical storyboard placed on widgets other than being listed by overt operators in spreadsheets separated from UI design. The widgets are in frames, representing what users see as they precede with others tasks. The frames are connected through transitions drawn from