Perez V. Sec'y HHS

ALJ is not qualified to interpret raw medical data in functional terms, but in this case, ALJ warranted in finding that claimant's physical impairments do not impose significant exertional limits without medical assessment of RFC. ALJ's observations at hearing were important Avery considerations in light of paucity of medical evidence. ALJ's observation of disability benefits claimant's demeanor at hearing provided substantial evidence for conclusion that nonexertional impairments did not disable claimant, in light of paucity of medical evidence to suggest objective physical basis for disabling pain and vocational expert testimony that claimant could perform the jobs he identified even if she suffered a constant light pain.