Obtain the claimant's statement about the nature and frequency of the personal services
they perform and whether or to what extent the claimant's presence is required because
of the child's disability. Also, get a similar statement from the physically disabled
child. You may obtain these statements while developing evidence of the child's disability.
Development in the file on the child's disability may also contribute information
relevant to a determination of the claimant's performance of personal services. If
there is any question, obtain statements from others living in the household or from
other persons who have knowledge of the circumstances.