Suppose that a researcher recruited a group of male professors and a group of violent prisoners, and randomly assign members of each group to either (a) play competitive games, or (b) watch a documentary about golf. Based on past research regarding testosterone levels, we should expect that ____
a. the competitive game-players and the documentary-watchers would have similar testosterone levels
b. the prisoners and the professors would have similar testosterone levels
c. the prisoners who played competitive games would have the highest testosterone levels
d. the professors who played competitive games would have the highest testosterone levels
C
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In the scientific use of the term, a "theory" is ________
a. a prediction about the outcome of a given experiment or study b. an organized system of assumptions and principles that purports to explain a set of observations and how they are related c. a precise definition of a term in a hypothesis, which specifies how it will be observed and measured d. a scientist's best guess about the cause of an event or phenomenon
Which of the following is the correct order for scientific research?
a. Evidence, prediction, hypothesis, theory b. Prediction, evidence, hypothesis, theory c. Hypothesis, evidence, theory, prediction d. Theory, hypothesis, prediction, evidence