I listen to tapes while I'm working, doing homework and (gasp!) driving - don't worry, I know how to override the commands to close my eyes

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My theory is that these tapes use light hypnosis to affect change and many states, including the state of concentration while studying or working and the "auto-pilot" of driving are actually mild trance states.
I've been using this theory for a while, primarily with the Personal Genius tape and I've seen some amazing gains. One thing I do notice,though, is a one or two week lag between when I specify a goal and when I notice it "taking hold."
For example,about 3 weeks ago I used Personal Genius with the goal of improving my visualization skills. Last week I found myself running through a martial arts pattern in my head. I was able to mentally practice the pattern so well that, even though when I first learned the pattern I didn't completely understand all the movements, the next week I passed a test on it without ever physically practicing the whole thing in the intervening time.
In summary, I would tend to agree, that we don't get the _full_ effect when listening while doing other things but I personally feel that every listening session counts and rather than listen to music (which I used to do during almost every activity), I might as well listen to something which will postively impact my personal development.
Play with it!
Mike