Very important to identify and use external sources to establish further corroborating evidence of a claimant's behavior and functioning, particularly in the area of PTSD. The symptoms / results of PTSD are often not readily seen in an office examination or via telephone interview, but can be triggered when a person is under stress or in certain situations (e.g., being in crowds, loud noises, kids screaming). Therefore, it is valuable to collect information from external sources, given that the sources are considered "reliable reporters." This would require a skilled interviewer, or a robust questionnaire given to family members, but would provide important qualifying information.
Idea No. 185