At the beginning of the night you don't spend very much time in REM sleep. Seeming that you only were asleep for 30 minutes I am guessing that you haven't even been through a REM stage yet. Ultimately this is a very early WBTB and while it may have some effect on dream vividness, I find it unlikely that it would be similar to the kind of results you can get from awakening after 3-6 hours of sleep. 30 minutes just isn't that long. |
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