Unit 0 - Research Methods

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To accurately infer cause and effect, experimenters should use

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random assignment.

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What technique do researchers use to reduce the impact of confounding variables?

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random assignment

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Which makes finding statistical significance more likely? Options: random sampling, small sample size, large sample size, operational definitions

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large sample size

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Professor Shalet contends that parents and children have similar levels of intelligence largely because they share common genes. His idea is best described as a(n)

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theory.

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Professor Ambra was skeptical about the accuracy of recently reported research on sleep deprivation. Which process would best enable her to assess the reliability of these findings?

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replication

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In which research method do we study one exceptional individual in depth and try to carefully draw conclusions about others based on the evidence?

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case study

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To learn about the TV viewing habits of all the children attending Oakbridge School, Professor DeVries randomly selected and interviewed 50 of the school's students. In this instance, all the children attending the school are considered to be a(n)

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population.

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Which of the following statistical measures is most helpful for indicating the extent to which high school grades predict college grades? standard deviation, mean, median, correlation coefficient (r)

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correlation coefficient (r)

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Researchers are interested in studying the impact of drugs on human fetuses. In this case, why would a correlational study be more appropriate than an experiment?

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because participants could not be ethically assigned to an experimental or control condition

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Random sampling is to ________ as random assignment is to ________.

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surveys; experiments