“When you draw an object, the mind becomes deeply, intensely attentive,” says the designer Milton Glaser, an author of a 2008 monograph titled Drawing Is Thinking.
A great article that curates some strong evidence on the value of putting pen and pencil to paper. Is drawing hardwired? Whether as a simple doodle or a more deliberate free-hand drawing, the act is essential to expressing spontaneous concepts and emotions.
The piece references the following research that tested if doodling improved or hindered attention to a primary task. There conclusion was that in this case doodling while working can be beneficial.