"A Study of Thinking"
I have the first edition. A Study of Thinking, Jerome S. Bruner, Jacqueline J. Goodnow, and George A. Austin;John Wiley & Sons, Inc.,1956.
This book looks very meaty and will take a lot of study. It is "still hailed as a major contribution to our understanding of the mind;", "Groundbreaking; "Pioneering".
From the first paragraph of Chapter 3, "The Process of Concept Attainment":
"The transition experience between "not having" (a concept) and "having it" seems to be without experiential content."
It is true that the transition experience is always unconscious, although the experience of activating the "Shh" Tract can be either conscious or unconscious. One can consciously and deliberately make the unconscious experience happen!
"It is an enigmatic process and often a sudden process". Something happens quickly and one thinks one has found something."
But "It is curiously difficult to recapture pre-conceptual innocence."
This is wrong. In fact, it is very easy to recapture pre-conceptual innocence! The mind has a special tract just to allow this! "Shh" Tract. It is not overly hard to learn to use this brain system! That is why it is there! If the brain could not recapture pre-conceptual innocence, it could never process the new and unheard of, which would defeat the brain's whole purpose.