You are admiring John's dimples. They are an example of John's

When trying to understand social relationships in her new school, Tammy generates a set of hypotheses about who is friends with whom, then systematically looks for evidence to confirm or disconfirm them. Piaget would place Tammy in the _____ stage of cogn

A) sensorimotor B) preoperational C) concrete operational D) formal operational

One of the biggest limitations of meta-analysis is that

a. some consider the technique to be unethical. b. statistical results may not be available from the published work. c. the technique is only useful in the natural sciences. d. the technique is more philosophical than scientific.