Question 6-(2 points) Traditional user interface experiments that can be performed during active evaluation: Must produce statistically significant results Require the specification of independent and dependent variables Require the development of clear hypotheses before running them All of the above None of the above Question 7(2 points) Which one of the following options is not a Nielsen heuristic user interface principle? The user interface elements must display good perceived affordance The user interface must be consistent throughout the application The system must attempt to prevent errors whenever possible The status of the system must be visible to the user at all times The system must support the notion of recognition rather than recall