This is actually not my question, but my husband's. I'm not even lucid yet (let alone in active control of my dreams!) but I've excitedly told him about my journal and how I've gotten much better at remembering my dreams within just a couple of days. So I'm hopeful that I'll be lucid soon, and that worries him. What worries him is not so much the lucidity but the next step: actually influencing and controlling the dreams. He says: But dreams have a purpose – you need dreams to safely process your experiences. If you start hijacking dreams and forcing them to take a different course, won't that prevent your mind from dealing with whatever caused the original dream? He's a graduate physicist and has a very scientific mind, so he wants to know: Have there actually been studies by reputable sources about the effects lucid dreaming has on mental health?