The more things change, the more things change
The Hawthorne Effect basically says (and this is a simplification of a fascinating theory which you really ought to wikipede right now) that any thing you consider or put attention on tends to spontaneously improve in and of itself, even if what you are doing isn't working.
Does this apply to consciousness too?
If so then the effect basically can be restated:
Any attention on consciousness tends to spontaneously improve consciousness, in and of itself.
I think it follows then that the more variety of conditions tried on something, the more attention is attracted to that something. In this case, the more diverse experiences of consciousness arise, the more consciousness evolves. In a way this is stating a truism, even a cliche. The more things change, the more things change. Change is the only constant in an inconstant world and universe. As a result, engaging change consciously will increase the speed of changes and therefore of improvements.