 However, this is typically isolated to social contexts that require speaking, is not a trait anxiety, and this anxiety does not persist if stuttering remits spontaneously.Research attempting to correlate stuttering with generalized or state anxiety, personality profiles, trauma history, or decreased IQ have failed to find adequate empirical support for any of these claims.The lifetime prevalence, or the proportion of individuals expected to stutter at one time in their lives, is about 5%, and overall males are affected two to five times more often than females.