Is it a generally held view that tension and anxiety cause stammering in some children?
No. People (including researchers) are misled because there is no strong evidence that those who stammer are more tense or anxious than those who don’t. Other children can be just as tense as those who stammer, but instead of releasing tension through a stammer they have some other outlet for it, e.g., ardent thumb-sucking. (Children express their tension and anxiety through a wide range of personality traits.
