Human-Computer Interaction Research Paper Example | Topics and Well Written Essays - 2000 words

Human-Computer Interaction - Research Paper ExampleBack in the 80s, when human-computer interfaces were born, the factors of ergonomics and user-friendly design were mostly ignored, which led to dissatisfied users and threatened the life of the interface. But as the computer software and hardware sedulousness developed, so did the methods of evaluation of these products. The development and innovation in computer organisations, may it be software or hardware, requires constant usability testing and interface modifications. This technique is employ to evaluation a product by testing it on users. This is inarguably an irreplaceable testing practice since it gives a direct input on how users use the system (Nielsen, J.,1994). These modifications need to take place constantly thorough the development cycle of a particular software or hardware. Various methods can be active in order to test and evaluate a particular computer interface in development. . A. USER-BASED TECHNIQUES An arra y of techniques is available for evaluating the usability of a particular interface. Overall, these techniques can be classified in the following categories 1. User-Based The user-based method, as the name implies, takes real users as a testing medium. This method yields the most reliable and valid results as it at present analysis the feedback from the user. In this technique, a group of users are provided with the test interface in a defined environment or out in the field. They fundamental interaction with the interface is closely observed with emphasis on how they use that particular software or hardware to complete their task. Speed is alike one of the special gauges. After the task is complete, users are then interviewed and are asked to describe their own experience and perception of the interface. Thus, using this data and feedback, the interface can be supercharge improved which will eventually improve the satisfaction level of the user. The user-based evaluation proced ure is usually video recorded and analyzed later. However, this evaluation can also be in the form of a joint interaction between the user, the evaluator and the interface under evaluation. This enables the evaluator to get a more active feedback from the user. Ideally, a large group of users would provide a more concrete feedback, but this is not always logistically possible. As a result, there is a colossal interest among HCI professionals in how to get the best feedback from the smallest focus group. While popular myths exist about being able to keep an eye on a majority of problems with entirely 2 or 3 users, it is believed that a sample size requirement is largely dependent on the type of errors one seeks to identify and their relative hazard of occurrence. Whereas 3 users might identify many problems in a new application, substantially more users will be required to tease out the be problems in a mature or revised product (Lewis 1994). 2. Expert-Based Once again, as the name suggests, an expert-based evaluation is when an HCI expert evaluates the application in order to determine and forecast its usability in the hands of the user. Obviously, this method is far more cost efficient and quick as compared to the user-based evaluation as it does not involve hiring a focus group and then analyzing their feedback. In HCI, two common expert-based usability evaluation methods are Heuristic evaluation (e.g., Nielsen, 1994), and Cognitive Walkthrough (Wharton et al, 1994). In the Heuristic method, the evaluator is provided with a simple check discover made according to a set guideline which he uses to evaluate the application step by step. Any incompliancy of the application with respect to the list is treated as a problem. In the Cognitive Walkthr