This one has more merit to it, but I still don't think it "causes" blocks. Rather, "divided intentions" can exacerbate a block. In order to have the divided intentions you must first learn that stuttering is something that needs to be feared. The author got this far, but didn't get far enough to what events cause that fear to develop. Going all the way back to when we are just starting to stutter, one must exhibit stuttering before he can realize that he is stuttering. He has to realize he's stuttering before he can fear stuttering. So, stuttering has to come before the learning of the anticipation of stuttering (my term for 'divided intentions'). Jumping back to "developed" stuttering. The anticipation of stuttering may cause us to "tense up" bringing in excessive musculo-skeletal tension back into the picture. So, it's not the anticipation that causes stuttering, but the anticipation increases physiological tension, making smooth, fluid speech movements more difficult to complete. My biggest problem with the 'divided intentions' idea is that it's not measurable, it's not testable. It's not a scientific hypothesis. (there might be some way to come up with a measure but the number of confounds would be difficult to manage).