 Absent-mindedness is not a diagnosed condition but rather a state people experience in their daily lives from a variety of different causes including boredom, sleepiness, or focus on internal thoughts instead of external surroundings.When suffering from absent-mindedness, people tend to show signs of memory lapse and weak recollection of recently occurring events.This can usually be a result of a variety of other conditions often diagnosed by clinicians such as attention deficit hyperactivity disorder and depression.