A social research methods class wants to study smoking. First, the professor asks how many people in the class are smokers. Two people indicate that they are. Then she asks how many people have smoked a cigarette in the past week and ten people indicate that they had. From this, the class decides, for the purposes of the survey, a smoker will be anyone who has smoked a cigarette in the past week and currently owns a pack of cigarettes. This is a(n)

An operational definition

Explanation:An operational definition refers to what a researcher uses on order to measure out that specific variable , that they are interested in measuring. This is crucial in order to make a person be well aware of what the researcher is speaking about when they make certain references.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

texas governor sam houston opposed secession, but was unable to prevent it. in this speech, given prior to lincoln's election, he presents the argument that slavery would be safer within the united states than outside of it. it was a prescient argument, and one held by several other southern leaders.

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