Diagnosis of stuttering employs information both from direct observation of the individual and information about the individual’s background, through a case history. Information from both sources should span multiple, various settings and times.[40] The SLP may collect a case history on the individual through a detailed interview or conversation with the parents (if client is a child). They may also observe parent-child interactions and observe the speech patterns of the child's parents.[41] The overall goal of assessment for the SLP will be (1) to determine whether a speech disfluency exists, and (2) assess if its severity warrants concern for further treatment.