Determine the valence intensity of the following tweet, considering the mental state of the author. Assign a real number between 0 and 1, where 0 denotes extremely negative and 1 denotes extremely positive.
Tweet: Get the feeling @Eurosport_UK and @itvcycling might be reviewing showing all stages in full. Poor @robhatchtv @nedboulting 😴😴😴 😉 #dull