That will depend on the material, subject, your interest and your emotional ties to it. Short articles even a beginner can proceed to activation without lenghty incubation. 20 mintues for a book is always good. If the boss gives you a book and says there is a meeting on it at 2 pm today and you've got an hour right now, PhotoRead the book, go to the rest room, come back with a glass of water and your mind mapping toys and activate straight away. That may be a 5 minute incubation or it might be 10 it makes no difference. Ultimately it's your purpose that is important.
Be realistic. It makes no sense to leave a textbook till the last minute. PhotoRead it first chance you get. Do you have to PhotoRead it again before actiation if you PhotoRead the book 2 weeks ago? Nope, and it doesn't hurt if you do either and you can activate immediately after PhotoReading.
If you are in the habit of Post viewing instead of a longer Preview, your post viwing is a mini activation already.
You will never recall a book that you have not activated since you have not called on the information in the first place you cannot re-call it later.
To look at your question from what I beleive you intend to be asking
How long before you experience being able to explain acquired knowledge from a book you have PhotoRead and not activated? (AKA spontaneous Activation)
Everyone is different. Done the dictionary game? If so in a sense you've demonstrated this with the game. Were you dismally bad or interstingly successful. This is how you will experience you non activated tests in general. Till you let go and just let it be what it is. One day you just notice spontaneous activation. If you would like to experiement with it you can do it at any time.
Ask someone to give you a book which they have read but you have not. PhotoRead it Let it incubate then have them quizz you. Ask them to start with mulitple choice don't be too disappointed that you cannot give elaborate details afterall you haven't consciously read the authors words and the non conscious mind has processed this in a way that is more symbolic and patterned than vocal as the words are on a page when we individually read them.
More you PhotoRead the stronger it gets. If you want to use other techniques that improve the nonconscious - to conscious communication, there is a wealth of them in the Genius Code course.
Alex
