According to the federal regulations, which of the following
studies meets the definition of research with human subjects?
1.
A developmental psychologist videotapes interactions between
groups of toddlers and their caregivers to determine which
intervention methods most effectively manage aggression.
2. A researcher asks the director of a local free clinic about
the number of patients in the last two years with newly diagnosed
HIV/AIDS.
3. A researcher uses the Customs Office's passenger lists for
ships bringing immigrants to the U.S. between 1820-1845 to track
the numbers of immigrants from certain ethnic groups.
4. A researcher conducts a linguistic study of comments posted
on a local public blog.