From a great NPR story last week on the genetics of stuttering. According to the story, a recent study has found that stuttering can indeed have genetic origins – i.e. rather than being a purely psychological or neurophysiological phenomenon. The implications, as expressed in the interviews at the end of the story, have some remarkable Gospel similarities (ht JD):

“Knowing that [stuttering] has biological causes and that three genes have been found is pretty exciting,” says Jane Fraser, president of the Stuttering Foundation of America.
Her father, Malcolm Fraser, a successful businessman, started the foundation in 1947 because of his own struggles with stuttering. The initial “F” of his own name gave him particular problems.

“One of the things that always worried him,” Jane Fraser says, “was that he simply wasn’t working hard enough. That if he just tried harder, he could keep himself from stuttering. Knowing that it has biological causes would lift a tremendous burden of guilt. I’m sure of it.”

Kristin Chmela knows what she’s talking about. She’s worked a lifetime to overcome her own stuttering, and she can now, nearly all the time. She’s also a certified “fluency therapist” in Long Grove, Ill., who treats other people who stutter.
“To be able to say that there is this truth, this biological cause of the problem, is pretty profound,” Chmela says. “I think this is going to have a lot of implications, just psychologically, for a lot of my clients.”