The biographer of Robert Moses, Robert A. Caro, refers to the bridges and underpasses of the famed New York State parkways. These bridges and underpasses are quite low, intentionally specified by Moses to allow only private cars to pass. All those who traveled by bus because they were poor or black or both were barred from the use and enjoyment of the parkland and its "public amenities" by the technical design of the bridges. Even at the time of Robert Moses, a political statement of the form "We don't want them blacks in our parks" would have been unacceptable in New York State. But a technological expression of the same prejudice appeared to be all right. Of course, to the public the intent of the design became evident only after it was executed, and then the bridges were there.
Ethnographic studies are distinct from ethological research in other species because we can speak with our subjects and ask them questions. This has tremendous value, but much of what humans do is not spoken, and we also observe, count, and measure.
Accurately capturing how people spend their time is contingent not only on systematic data collection, but also on participants moving in a relaxed and normal manner through their daily activities. Just as primatologists habituate their subjects to their presence, anthropologists first must develop rapport and trust with the communities in which they live.
Scan samples and focal follows are two commonly used behavioral observation methods.
During a scan sample, randomly selected individuals are located at specified time intervals, usually every ten to fifteen minutes, and the observer instantaneously records what the participant is doing.
Focal follows complement scan samples by documenting the continuous sequence of an individual's activities. During a focal follow, each subject is observed over a period of several hours with each change in activity recorded with a start and stop time.
In most traditional societies children help care for their younger siblings. However, it is often the case that a child minding his younger sibling does so out of the corner of his eye while playing with other children. Is this play or child care?
I organized behavioral codes to contain several levels of information. As in this example, if a child is outside playing with friends while minding her two-year-old sister, the activity was coded as 675: the 600 signifies noneconomic activity, the 70 that it is playing, and the 5 that it is playing while in charge of a child. All activities were coded in this way. A nested classificatory hierarchy preserves both detail for future research and flexibility to lump or disaggregate activities for analyses. This method of nesting information carries over into many kinds of coding and classificatory schemes.
Because they live so successfully in their world, we expect our subjects to readily explain the strategies that underlie the behaviors we observe. This can be trying, because from their point of view we are asking the obvious, a child’s question.