I don't think that stuttering should be ruled out as not type related. More men stutter than women. More men are also logical. I think that if the majority of stuttering men and women are found to be logical rather than ethical, there may be a link between personalities and stuttering. Also, this test would only apply to chronic stutterers. Yes, everyone stutters once in a while but some people still stutter even when they feel internally comfortable and this is what I am referring to.