please your help the deadline for assignement and chart  after one hour and half 

Week 2 Questions
1. Describe how interface researchers apply the scientific method (controlled experimentation) to validate their designs. 2. What are the weaknesses of controlled experimantation? 3. Name the usability measures that can be used to produce a practical evaluation of a system. Keep the goals of efficiency and satisfaction in mind with these measures. 4. Name some reasons why the interfaces for electronic health records (EHRs) have remained hard to use. (From article “User Unfriendly”) Terms and Concepts to Know: 1. Time to learn 2. Speed of performance 3. Rate of Error 4. Retention over time 5. Subjective satisfaction 6. Design Plasticity 7. Life critical systems 8. Controlled Experiment

Usability Motivations Chapter 1.3 System Cost Considerations Life Critical Systems: [Examples] Air traffic control, nuclear reactors, police/fire, military, medical High costs are expected Performance
Requirements (Speed, reliability) High Training/Learning Factors Lengthy. Needed to produce rapid, error‐
free responses, even when users under stress. Importance of Subjective Satisfaction Less. Users are well‐
motivated professionals. Industrial and Commercial Uses: [Examples] Home/Entertainment: [Examples] Exploratory, Creative, Collaborative Interfaces: [Examples] Not mentioned. What would you predict? Sociotechnical Systems: [Examples] Often government funded. Difficult to assess because of exploratory nature of these applications. Not mentioned. What would you predict? Must generate confidence from the using public. User Needs, Skill Levels Skill obtained by frequent use of common functions and training for emergencies.

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