According to dynamic systems theory, a young girl makes the shift from crawling to walking because ________.

A. she has reached a critical period
B. it satisfies her current needs
C. her genetic program supports it
D. her perceptive skills have matured

Answer: B

Psychology

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A researcher who provides a certain treatment to one group and withholds treatment from a completely comparable group is using the __________ research method.

A. correlational B. epidemiological C. case study D. experimental

Psychology

Phil and Olive are in the backpacking club at school. On the weekends, the group sponsors orienteering activities and guides short hikes in the community. Among their peers, the group is called "The Nature Children." This is an example of a

A) crowd. B) clique. C) clan. D) circle.

Psychology