Its your research but you don't know what it means? How an earth are we suppose to know?
When quality of sleep? increased self control? (whatever that is) decreased in evening participants? or it may be the other way around, look at your data.
And there was no relationship between sleep and self control with the morning participants.
So depending on what your null hypothesis was (if you predicted there would be a relationship) you would now have to reject it and use your alternative.