Well kinda sorta ... The first disorder Orton and Travis (psychologists) studied was stuttering. This drew Johnson, Van Riper, Williams (early speech pathologists) etc to the University of Iowa ... it was a happy accident that Orton and Travis picked stuttering when Seashore told them to start studying communication disorders. But these men ran with it, and so you're correct that speech pathology was started by these early speech scientists who also stuttered. I'm a PhD student working in both speech pathology and psychology at the University of Iowa, where it all began. I routinely walk through the building where most of the early research took place ... :) Kinda fun.