 They might also employ a test to evaluate the severity of the stuttering and predictions for its course.One such test includes the stuttering prediction instrument for young children (SPI), which analyzes the child's case history, part-word repetitions and prolongations, and stuttering frequency in order to determine the severity of the disfluency and its prognosis for chronicity for the future.Stuttering is a multifaceted, complex disorder that can impact an individual's life in a variety of ways.