Observational Data Unobtrusive or nonreactive measures are also sources of data and are particularly relevant to community characteristics. These types of data constitute what is collected during a windshield or walking survey, as explained in the Community Toolbox. For example, walking around a neighborhood and observing how many blocks contain abandoned buildings or storefront churches is an unobtrusive measure. Counting the number of liquor bottles in a garbage can, counting the number of bill- board advertisements for unhealthy behaviors, estimating the ratio of bars and pubs to banks, watching the interactions among residents in a local bakery, and collecting local community newspapers are all examples of data collection of the least invasive nature. Each of these examples provides clues to the character, strengths, and problems in the community as a whole. The use of unobtrusive measures is inexpensive and can provide interesting data about what health problems exist and what may be contributing to those problems.
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