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Describe some of the hallmarks that distinguish a field study.

The group of participants chosen to receive the independent variable in an experiment is called a(n) __________.

Why has Vygotsky’s sociocultural theory become increasingly influential?  

Behavior modification depends on what principle?

Researchers who are interested in the relationship between televised aggression and subsequent behavior have found that children who watch a good deal of televised aggression (murders, crime shows, shootings, etc.) tend to be more aggressive than those who watch little of this type of television programming. This is an example of a(n) ____________ study.

__________ research is designed to discover causal relationships between various factors.

Freud proposed a theory that suggests that unconscious forces act to influence personality and behavior. This is called the __________ theory.

According to Freud, a series of stages that children pass through in which pleasure, or gratification, is focused on a particular biological function and body part is called __________.

The device whose operation involves a computer constructing an image of the brain by combining thousands of individual x-rays taken at slightly different angles is called a(n) __________.

Which statement accurately describes how relevant research has shaped public policy?