A decision dream is where you are asked a question or given options, and then you watch yourself provide an answer or make a choice. This is the greatest proof we have that we are made up of three parts. Your mind is turned off at night as your body rests, so neither can help you make a decision in your dream. But your spirit can and does. Watch carefully the choices you see yourself make in your dreams, for they are very telling when it comes to what is going on in your spirit, good and bad.
"At Gibeon the LORD appeared to Solomon in a dream by night; and God said, “Ask! What shall I give you?” - 1 Kings 3:5 (NKJV)