Households with a child age 18 or younger were called back and screened to find 12 to 17 year-olds. The survey was conducted by Princeton Survey Research Associates International. The interviews were done in English by Princeton Data Source, LLC from October 23 to November 19, 2006. Statistical results are weighted to correct known demographic discrepancies. The margin of sampling error for the complete set of weighted data is ±3.7%. The response rate for the full survey is 46% of the previously interviewed households