Sample and Interviewing
|Selection of a national sample of 103 primary areas (counties or groups of counties) stratified by geographic region, type of community, and other population characteristics.|
|Selection of 300 interviewing locations, or secondary areas (census enumeration districts or block groups) from the national sample for use in this study.|
|Field counts by trained interviewers to divide interviewing locations into sample segments of 10 to 25 housing units.|
|Selection of specific sample segments in each interviewing location forfield administration of the survey.|
|Random selection of the eligible person to be interviewed using a specific scheme assigned for each sample household.|
More detailed information on each of these steps is available in the methodological report prepared by Response Analysis Corporation ( Weisbrod, 1976). This will be supplied at cost (write to Response Analysis Corporation, Research Park, Route 206, Princeton, N.J.08540).
Eligible families consisted of a couple who identified them-