Information for Selected Respondents

Thank you for agreeing to participate in our study. We reserved an appointment time specifically for you. Please plan to arrive at least 5 minutes before your scheduled appointment. If you are running late for your appointment, please call 301-458-4579.

Once you come into our building, you will be required to walk through a metal detector and your bags will be screened by an x-ray machine. You will be required to show valid government-issued photograph identification, such as a driver’s license or passport. After screening is completed, tell the security guard that you are here to visit Amanda Titus. You will then need to sign-in on our Questionnaire Design Research Laboratory (QDRL) visitor list. Then the guard will issue you a QDRL visitor’s pass. We will come down to the lobby to greet you & will take you upstairs for the interview.

For more information please contact Amanda Titus at


Directions to NCHS

For more information please contact Karen Whitaker


Page last reviewed: November 19, 2013