USA 1993

This information has been created by the Centre for Time Use Research at University College London

Samples included

Sample description
Country:	USA 1993
Study title:	National Human Activity Pattern Survey
Collector:	The Survey Research Center at the University of Maryland conducted the study for the United States Environmental Protection Agency
When conducted:	September 1992 to October 1994
Sampling method and study design:	Random digit dialling was used to draw a random sample of households in the USA. One person was randomly selected in each household to complete a time diary. If no children under the age of 18 lived in the household, the person who would next have their birthday in the household was selected to complete the diary. For households where children aged less than 18 were living, households were randomly allocated into a child interview (60% of cases) or an adult interview (40% of cases) group. After allocation to the group, the child or adult who would next have a birthday was asked to keep the diary. Respondents recalled their activities from the previous day with for the telephone interviewer. Diaries covered main activities, location of activities (83 categories), and whether the person was smoking or around people who were smoking during the activity. More diaries were completed on weekend than on week days
Sample size:	9,386 one-day diaries; 7,514 from adults, and 1,872 from childen aged less than 18
Response rate:	63% of the 14,908 contacted household completed diaries
Weighting procedures:	Weights adjust for the over-sampling of weekend days, for the presence of multiple telephone lines in households, for differential response rates by census region, and for the undersampling of adults in households with children. Different weights allow for the analysis of adults separately or of children separately