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| small group of subjects, out of the total number available of a target population, that a researcher studies. |
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| a research method in which the psychologist observes the subject in a natural setting and without manipulation or control on the part of the observer |
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| an in-depth research method that involves an intensive investigation of one or more subjects |
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a research method in which info is obtained by asking many individuals a fixed set of questions about their attitudes or behaviors |
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| research method in which data are collected about a group of participants over a number of years to assess how certain characteristics change and remain the same during development |
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| a research method in which data are collected from groups of participants of different ages and compared so that conclusions can be drawn about differences due to age differences |
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| the measure of a relationship between 2 variables or sets of data |
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| an assumption or prediction about behavior or an educated guess about the relationship between 2 variables that is tested through scientific research |
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| in an experiment, any factor that is measured or controlled and is capable of change |
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