在《Designing interactions》的第十章People and Prototypes裡，提到一個有趣的design discipline hierarchy，由底端向上依序是：
Anthropometrics — the sizes of people (For the design of physical objects)
Physiology — the way the body works (For the design of physical man-machine systems)
Cognitive psychology — the way the mind works (For the design of human-computer interactions)
Sociology — the way people relate to each other (For the design of connected systems)
Cultural anthropology — the human condition (For global design)
Ecology — the interdependence of living things (For sustainable design)
從瞭解一個人的生理到心理，從掌握個人到社會群體，從知悉單一文化到各國文化，從人類這個物種到地球上其他的生命…。由此觀之，要做個優秀的設計師還真是任重道遠外加難如登天啊。
