ORANGE COUNTY SURVEY

				METHODS
A. Sample
	The sample for the 1982 Orange County Survey consists of 1,009 randomly 
selected residents who were interviewed by telephone. The sample is 
stratified geographically, with half of the sample selected from North of 
the Santa Ana River, and half South. For data analyses, the sample is 
statistically weighted to represent the actual distribution of the Orange 
County population (see Social Data Analysts, 1982).
	The sample in each area was chosen using a computer program, which 
randomly generates telephone numbers from among working blocks of 
telephone exchanges. A working block is one that contains numbers in use. 
The total of telephone numbers generated within an exchange was in 
proportion to the number of residential phones represented by that 
exchange in the Northern part of the County or the Southern part of the 
County. Using this procedure, 2,000 telephone numbers from the South and 
2,000 from the North were drawn. This procedure of random digit dialing 
ensures that unlisted as well as listed numbers are included in the 
sample. Also, since 95% of the households in Orange County have 
telephones, random dialing yields a sample representative of the 
population of Orange County (Groves and Kahn, 1979).
	The Troldahl-Carter Method was used in randomly selecting which adult 
member of the household was to be interviewed (Troldahl and Carter, 1964). 
This method consists of enumerating the total number of adults in the 
house-hold and the total number of men in the household. Then, using a 
prearranged grid, the interviewer selects the individual in the household 
for inter-viewing.
	As further evidence of the representativeness of the sample chosen by the 
above methods, characteristics of the sample were compared to 
characteristics of the total Orange County population using the 1980 
census (State Census Data Center, 1982). On the basis of age, income, sex, 
marital status, house-hold size, and home ownership, the sample is 
representative of the population of Orange County.