1.   Now they conduct observational research, dispatching anthropologists to employ their ethnographic skills by interviewing, watching and videotaping consumers in their natural habitats.

2.   Observational research is another.

3.   Observational research is not new for American industry.

4.   The study was what epidemiologists call observational research, as opposed to a controlled experiment.

5.   Once admitted to these proposed sanctuaries, chimpanzees would not face any further invasive research, although observational research would be permitted.