The three interrelated elements of design are the combined action of head, heart and hand.
The head provides logic; the heart, emotional stimuli; and the skill that gives form to design concepts is executed by the hand.
『美術は、人間の心が中心になり手と頭がこの活動に参加し、工芸は、手が中心になって頭と心が参加し、デザインは、頭が中心になって心と手が参加しているもの。』
リチャード・ギャット（デザイナー）
Head, heart and hand
by Richard Guyatt
Anatomy of Design (1951)
Basics Illustration 03: Text and Image (1953)
books.google.co.jp/books?isbn=2940373507
In 1950, Richard Guyatt, the British designer and academic, described the three interrelated elements of design as the combined action of head, heart and hand. The head provides logic; the heart, emotional stimuli; and the skill that gives form to design concepts is executed by the hand.
____________________
Burning the Box of Beautiful Things: The Development of a Postmodern Sensibility
by Alex Seago
books.google.com/books?isbn=0198174055
____________________
Why Is Visualizing So Helpful To Designing With Type?
by C. Knight, J. Glaser
http://www.smashingmagazine.com/2012/09/07/drawing-mark-making-creative-way-maximize-design-ideas-type/
____________________
デザインを始めた人のための考える方法
by 森本武
P91