I am a scientist with a strong interest in magic (or a magician with a strong background in science, take your pick), and have been thinking about how to talk about the science of magic in an accessible and interesting way that won't become about exposing methods, but about exposing psychological phenomena.
However, I think that exposing some methods is necessary if you want to have an intelligent conversation about misdirection and how it works in magic. I have given talks about the subject of science and magic, and my approach is to perform a short spongeball routine at the beginning, with a volunteer. Then I can talk about some of the elements that make it seem "magical" with a concrete reference point that everyone has experienced. I focus my talk on three aspects of magic: perceptual elements, psychological elements, and attentional elements (i.e. misdirection).
The only sleight I expose is the retention vanish of a spongeball. I don't go into the details of the mechanics, but I think it's a good one to use because a magician has to incorporate all three elements to make it work. It has a strong perceptual component, in that it will work even when you know what the magician is doing: the visual illusion is very strong, and involuntary. However, without a psychological context built around it, it won't take long for a spectator to start suspecting the "other" hand. And finally, it's a good substrate to talk about misdirection and what it really means.
I always make the point that most people have heard of misdirection, but they tend to think that it means directing attention away from the secret stuff, and while that certainly qualifies as misdirection, it is bad misdirection. If I'm holding a red rose, and I manage to make everybody look away from me (say, to my scantily clad assistant), and when everybody looks back the rose has turned white, most people won't know how I changed the rose, but they will know exactly when I did it, and will therefore make their own assumption as to which method I used.
A much more effective way of misdirecting is to draw attention toward the effect, rather than away from the method. So I talk about how in a retention vanish the effect is the vanishing of a ball, and so with my body posture and eye gaze, etc., I try to heighten interest in that, and it has the added benefit of automatically draw attention away from the "dirty" hand, since we can only really focus on one thing at a time.
What really makes it work, though, is that the spectator has had the impression that he was looking exactly where he should have the entire time, that he was following along the whole time, he didn't get distracted and "miss" anything. So when the ball vanishes, it is entirely impossible to reconstruct not only what the magician did, but when he did it, or how.
This is the way I've been framing my way of thinking and talking about misdirection and the mind. I'm sure it's not the only way, and that many magicians on this forum will disagree with lots of stuff here, but hopefully it'll give you some ideas on how to frame and present your material as well.