Ch 1
In this chapter, the differences between complexity and complicated is described. Complexity is a state of mind but understandable but difficult. Complicated is confusing. Complexity can cause an artifact to be not as boring as a simple one.
Ch 2
The chapter discusses how complexity is all dependent on the situation and the individual. The idea of conceptual models are re-introduced.
Ch 3
This chapter discusses how the non trivial and simple things can actually complicate our lives. Examples of door locks and passwords are given to demonstrate the notion. They way technology is today however, we can't just have one password for all our information.
Ch 4
This chapter talks about social signifiers to serve as indicators to provide information to people. These are viewed as perceived affordances which can be impacted by culture
Discussion
These chapters were just reinforcements of what was already introduced in previous Norman books.
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