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Science News for November 6, 2000


'Six degrees' method samples hidden populations

A new sociological sampling method, called respondent-driven sampling, can identify hard-to-reach groups. By analyzing the connections between individuals in a group, researchers can gather information and correct for biases to obtain a representative sample of populations such as drug users, jazz musicians, and other marginalized groups.

SourceCornell University·JournalPoetics·DateNov 6, 2000

Simulated operator

A Carnegie Mellon University computer model performed as well as a human in managing seven tasks simultaneously and coping with frequent interruptions. The training advantages of the model are enormous, allowing operators to gain valuable experience at much less cost.

Violence is a learned behavior, say researchers at Wake Forest University

A new study by researchers at Wake Forest University found a strong association between exposure to violence and the use of violence by young adolescents. The study, which included 722 Georgia middle school students living in or around public housing, found that even if children are exposed to other risk factors, social learning from e...

SourceAtrium Health Wake Forest Baptist·JournalThe Journal of Pediatrics·DateNov 6, 2000