“Emotion is becoming accepted as an important ingredient of successful humancomputer interaction design. It has always been important in design, but as a discipline rooted in the methods and mindset of the cognitive psychology of the 70s and 80s, HCI has been slow to accept that affect (as exhibited in feelings of happiness or anxiety) is an essential component of reasoning about the world, not an opposing force. Although we may loosely speak of emotion versus reason, both too much and too little emotion will have a negative impact on cognition, with the latter being the more pathological.” (John Waterworth – uiGarden.net)