Designing for a wide audience can be very difficult because it involves a tedious process of democracy. Various stages of the project needs to be clearly articulated in order for a coherent critique from the team. Among a few other practices that must not be thought of as unnecessary, but as vital or mandatory. Testing your design with your target audience greatly increases the validity of your design when it succeeds amongst your peers. If there aren't any available people to volunteer, you can design a test survey online via email or PDF's. Getting individual reactions however will require a one on one session with your test subjects. This is probably the best option because people will be more willing to be honest without the fear of backlash from other focus group members.
A one on one with a test subject has the most comprehensive results in terms of feedback. These newly underlined points of interest in your project should now be incorporated into your design process. Apart from the research involved, this eliminates having to make design choices on your own and in the dark. Moving forward every decision will be affected by the input you received from your test subjects with improved intuition among your creative peers as well.
The second reading talks about the relationship a public space has to an entire world of people that visit. The story that connects all of us must be conveyed in such a manner as to keep in mind the emotional trauma that is connected with the designed space. In this case the world trade center memorial with a strong dynamic of people. The story was within them on that day. They were fire fighters, Police, and Family Members that to me represent NEW YORK itself. The memorial needed to follow that narrative without generalizing the millions of lives that and families that have been affected by the event.