
What about the 59 people who didn't finish?
While there's no doubt that it's difficult to do meaningful studies of real people, I get suspicious about extending results of small studies to the population as a whole. 59 people didn't finish the study (230 ended /289 started). Why did they quit?
I think, in general, it's better to achieve success in changing one aspect of one's life and build on it rather than trying to change several things at once (and making things worse if one fails). But I'm sure it depends on what one is trying to change....
FWIW.
Cheers,
Scott.