From what I understand, the research study suggests that understanding the functional models and cognitive processes of stuttering should be seen as fundamental starting points for research on stuttering. >*By applying Marr's concept of multiple levels to stuttering, researchers aim to understand stuttering not only at the neurobiological level but also at the cognitive and functional levels. David Marr, a prominent neuroscientist and cognitive psychologist, introduced the concept of multiple levels of analysis in the context of understanding brain function and cognition. His framework suggests that there are different levels at which one can analyze a system, with each level providing a different perspective and insight:* > >*1. Computational Level: This is the highest level, concerned with what a system does, why it does it, and what problems it's designed to solve. Understanding the overarching purpose or function of stuttering behavior.* > >*2. Algorithmic Level: This level is concerned with the specific algorithms or processes that the system uses to achieve its computational goals. Understanding the cognitive and neural processes involved in stuttering.* > >*3. Implementation Level: This is the lowest level, focusing on the hardware or physical mechanisms that execute the algorithms \[neural and physiological processes that underlie stuttering\]*