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A statistical technique that would allow a researcher to cluster such traits as being talkative, social, and adventurous with extroversion is called...

• A case study

• Meta-analysis

• Statistical significance

• Factor analysis

• Z score

Respondents to surveys often report that they are healthier, happier, and less prejudiced than would be expected based in the results of other types of research. This finding can best be explained by which of the following?

• Sampling bias

• Experimenter bias

• Social desirability bias

• Bystander effect

• Placebo effect

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• Experimental method

• Survey method

• Case study method

• Naturalistic observation

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• Independent variable

• Dependent variable

• Control variable

• Extraneous variable

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• Random sampling

• Stratified sampling

• Systematic sampling

• Cluster sampling

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• Placebo effect

• Hawthorne effect

• Observer effect

• Pygmalion effect

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• Double-blind procedure

• Single-blind procedure

• Open-label procedure

• Triple-blind procedure

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• Correlation does not imply causation

• Correlation implies causation

• Causation implies correlation

• Causation does not imply correlation

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• Longitudinal study

• Cross-sectional study

• Case-control study

• Cohort study

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• Informed consent

• Confidentiality

• Debriefing

• Deception