If you mean psychic abilities such as clairvoyance, aura reading, clairaudience, etc.. then it can effect it. If you have a negative event, you may enter a recession in abilities or a spiritual lull.
Everyone has psychic abilities, so their growth doesn't really "stop" nor does it "start" randomly, some people are more adept at their inherent skills, but you can build upon them with practice.
Spirits could help, especially with clairvoyance/clairaudience. I've most certainly asked my household spirits and spirit companions to aide in psychic workings, and with positive results.
If you mean powers as in moving water or flying, i'm afraid those won't ever come to fruition.
In my personal experience, personal powers tend to show themselves more prominently when we are at our peak. Whether this be at the highest understanding of ourselves and our practices at the time, or, when we are in a place in our lives where our personal power is needed the most. Once the power is no longer relevant, whether you have moved on from magick or you simply no longer have a need for it, it will start to fade. Especially when we are not paying attention to a certain part of ourselves, whether that be body, mind, emotion, or spirit. When we are well balanced with all four of these pieces of ourselves, that is when our personal power can be sustained and flourish.
It;s also a good idea to get a well rounded understanding of that personal power, what it is, what it is used for, and how to efficiently and realistically use it. My advice, once you find your niche, put it to daily practice as best you can. Incorporate it in daily life. Soon enough you'll be a master at your own gifts.
Spirits and other energies can have an effect. Both positive and negative. This is why I strongly suggest carrying things for protection, like stones or amulets, until you have learned to adequately "block" out those energies without the use of those tools. It takes time and practice but it can be done.
