To me the most amazing exercise was tone based exercise as already told in previous mail.
other exercises involved remembering word/text sequences. Performance on that improved as i was progressing on my course. To me, improvement in performance on these exercises served as indicator that there is improvement in memory as a result of tone based exercise. I doubt these exercises have much benefit on their own.
This goes in line with their theory that as the tone based exercises improve encoding of sound which helps in storing and recalling sounds better and easier.
Speech sound is seen as combination of tone by the brain.
or in other words we can say that any word sound can be broken down in to combination of these fundamental pieces of sound (individual pure tones of different frequencies).
when brain is exercised to identify these tone more precisely (differentiating more and more narrowly differing sound tones, as we make progress in course), it's processing speed and precision improves for general speech sound processing also.
in brain processing, faster is better.
As a result, it encodes better, store better and hence recall better.
For example, if the sound is not perceived clearly while listening, its recall would also be poor! it's like if the original version itself is dirty, it's copy would be by default dirty.
to recall better, it has to stored better in first place.
other exercise are visual exercises which are supposed to improve peripheral vision, particularly in older people which results in safer driving. this is what they claim. Insurance companies are supposedly giving discount on premium if these courses are undertaken!
i personally didn't observe improvements which appears to bring benefit in real life from these visual exercises.
the key thing here is that different people have different deficits. once they pick an exercise which exercises deficit area of their brain, they will see immediate and significant improvement.
By 'immediate' I mean after 3-4 weeks. you don't have to wait for months to see the benefit.
in my experience of sound based exercise, the benefits were so signifiant and so quick that there was no doubt at all. Alas, this is the only exercise which brought this kind of tremendous difference where I could quickly feel it and get benefitted from in personal life. I could hear more clearly, speech became more fluent, words feel like flowing freely.
many time people stuck , trying to search for the right word.. that just stopped. without effort, words will become part of your speech. you don't have to put conscious effort! it is as if you are giving a speech which you have already delivered 20 times. That is, completely effortless. no struggle for finding the word!
This single exercise is worth the money spent. But I am not sure, if it will help everybody like that. But people who have poor performance in speaking, recalling verbal content/words are like to benefit most.
BT