waking up before your alarm goes off - how does it happenmost of the time before i go bed i set my alarm for a specific time E.G 8:00. the next morning i wake up 7:55. HOW? WHY?

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It is like a conditioned response. If you have your alarm set to a particular time, it becomes a habit, due to years of practice. Perhaps you begin to wake up and anticipate it occurring and that is why you wake up a few minutes before your alarm does. I do this all the time. If you need to get to school or a job, it is a good thing.

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Some people do have an internal clock that seems to wake them up.  Also, there might be a certain noise that occurs before your alarm is set to go off.  I know what it is with me- my cat wakes me up!

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I assume that your body gets used to having a specific amount of sleep.  If you go to bed at roughly the same time, you might then wake up at the same time.  This, of course, does not always work.  There are plenty of people who are awakened by their alarms and still have a hard time actually getting up at that point.

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