Hello Sam, if you are an oddball then you are not alone, when not using a noter, I too mainly use my thumb. I am told by some that it is a bad habit, and I can see that point of view, but if those who are telling me had smashed their L.H.fingers in one way or another as many times as I have,they might tend to play in the same way. If playing in the manner that you do keeps you playing your dulcimer, go for it, but don't be afraid to try other ways, you might just develop into a true 'chord playing member' LOLmy regardsJohnH Sam said:
Great question, great thread. My musical background parallels yours ... I have none. Got interested in the dulcimer and have been doodling with it for some weeks now. I've tried a noter and like the sound. It's different than with fingers. Fingers? Guess I'm an oddball. I use my thumb, the side of it. I put my left index finger against it like I was holding on to a penny (something us older folks are akin too I'm afraid) then use my thumb like a noter. If I shouldn't be doing this, somebody needs to tell me to quit it!

)
(I think this is my first posting using the peace sign smiley.)