Emotional Design
Emotional Design is both the title of a book by Donald Norman and of the concept it represents. The main topic covered is how emotions have a crucial role in the human ability to understand the world, and how they learn new things. For example: aesthetically pleasing objects appear to the user to be more effective, by virtue of their sensual appeal. This is due to the affinity the user feels for an object that appeals to them, due to the formation of an emotional connection with the object.