During the chapter the author talked about peoples interactions with every day objects, and how their deigns, and quality of designs, effect the usage of the product. The chapter also talks about the thought process people go through when they interact with something new. People need to see and understand what the thing does in order to operate it. The simpler the design, and the easier it is to operate. The same goes for the process that is needed to get to the function of the device. For example the film projector verses the vcr player. The projector is much more complicated to load, whereas the vcr is simple, therefor people find it easier to operate even if they haven't used it before. The chapter also discuses people blaming themselves for not understanding a design when in actuality the design may be what's in question. Or blame something completely irrelevant for a failure. For example in the text, the story about the man blaming the libraries program for his power failure, just because he used the libraries program before the failure. I feel that this is related to interface because it really looks into the psychology of people interacting with things, and with that knowledge you can create interfaces that people can easily operate even if they have never seen the interface before.