The study involved the use of both focused thought on a subject, and distracted thought on a subject.
Each person in the study writes down a list of his ideas. They were then either left alone to think, or distracted. After this, they choose the idea from their list.
It shows of that distracted people chose better ideas than participants without distraction.
This implies that creativity is easier when distracted rather than focused. This might mean that distraction makes the unconscious more active letting ideas form easier.
Finding creative solutions with a distracted mind is sometimes easier than when focused.
Simone M. Ritter, Rick B. van Baaren, Ap Dijksterhuis; Creativity: The role of unconscious processes in idea generation and idea selection; Thinking Skills and Creativity, Volume 7, Issue 1, April 2012, Pages 21–27