True. I had no intention of ever doing more than watchy what develops. For personal use iI remembered what I wanted to remember. since had no practical application outside a laboratory set-up other than to say... Don't deprive yourself of sleep if you're studying and want to remember what you learned.
I have come across similar studies about REM sleep. I think they were surprised to find it happened during non REM because of the effects on memory already reported.. More and more I learn that we need more sleep not less. Especially with the fast pace at which we live these days.
Alex
