Table 1. Classes of usability problems: A. visibility problem B. feedback problem C. conceptual model problem D. affordance problem E. internal consistency problem F. external consistency problem G. simplicity problem H. problem preventing errors / not allowing error recovery I. problem not speaking the users language 4. Usability problems. For each of the following write which usability problem from Table 1 best describes the problem. 4a. ___ A user just selected File/Save from their applications menu, but has no idea whether anything was actually saved or not. 4b. ___ A user is trying to open a file in an interface, but has no idea what to click on. 4c. ___ A user clicks the little x on the upper right corner of their new Windows-based joke-of-the-day application but, instead of closing the application (as the user expects), it displays another joke. 4d. ___ A user clicks on one of the arrows in the UI panel shown but nothing happens (the user is supposed to drag the arrow in the indicated direction to scroll the display).

10