The MPI stuttering therapy is based on the many years of research by UCSB Speech and Hearing Professor Dr. Roger J. Ingham and colleagues. After a lengthy period of basic research and clinical trials, the MPI Program emerged and was tested in Phase II clinical trials with NIH support. The results of these trials show that the program is very effective in achieving sustained and durable fluency with clients who meet a series of assessment criteria.
MPI is short for Modify Phonation Intervals. A phonated interval (PI) is the elapsed time of a voiced unit of speech. Through extensive research and studies, Professor Dr. Roger J. Ingham and colleagues have found that by “modifying” the client’s PIs it is possible to achieve durable and natural-sounding fluent speech in most clients who meet selection criteria.