So far, one specific cause of stuttering has not been identified. Research is, however, revealing different explanations for the condition and looking at possible treatments. Norman Miller’s ‘The Science of Stammering’ article published on The British Stammering Association website (www.bsa.org.uk) gives a very good overview of the current findings from this research.
Click on the link to have a read:
http://www.stammering.org/speaking-out/article/science-stammering