Research Methods

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Researchers find that there is a significant, positive correlation between the number of hours students sleep and their grades. The researchers would be justified in concluding that

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students who earn good grades tend to sleep more than those who do not.

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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

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factor analysis

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A researcher surveyed social adjustment in the same group of 20 people from early childhood through adulthood. In this example, the group of 20 people surveyed was the study's

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sample

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Respondents to surveys and questionnaires often report that they are healthier, happier, and less prejudiced than would be expected based on the results of other types of research. This finding can be best explained by which of the following? Sampling bias, Social desirability bias, Bystander effect, Experimenter bias

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Social desirability bias

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Synesthesia is a phenomenon that has been estimated to occur in only a few people in a million. Because of its rarity, researchers are likely to choose which research method to study it?

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Case study

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Set A Data: 60, 56, 58, 62, 61, 59
Set B Data: 60, 41, 76, 35, 65, 50
Which of the following is true of the two sets of data?

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Set B has a larger standard deviation.

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Martha is an undergraduate student interested in psychology to help employees become more productive in the workplace. Which field of psychology should she select in graduate school? Options: Industrial-organizational, Cognitive, Educational, Clinical

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Industrial-organizational

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Which of the following studies demonstrates a cross-sectional research design? Options: Observing first graders as they test in two different subject areas, Testing first, third, and fifth graders at the beginning of the school year, Testing the first graders, and testing them again when they are in third grade, Observing first graders as they interact with either third graders or fifth graders

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Testing first, third, and fifth graders at the beginning of the school year

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Which psychometric property assesses the extent to which items on an intelligence test measure a person's intelligence? Options: Standardization, Predictive validity, Internal consistency, Construct validity

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Construct validity

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What was the dependent variable in this study?

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Incidence of aggressive behavior