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An in-depth look at an individual, a , can provide historical information about a person's emotional concerns or difficulties, childhood experiences, and family relations. |
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strategies allow investigators to predict a second variable given information about a first variable. |
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The advantage of the strategy over the correlational strategy is that it can demonstrate a relationship between two variables. |
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In an experiment, researchers manipulate the variable and measure its effect on the variable. |
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assignment to conditions assures that experimental groups do not differ in any systematic way. |
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If researchers want to employ children in their research, they must obtain from the parents or legal guardians and explain what the children will . |
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Media presentations may be misleading because the conclusions cannot be drawn from correlational research. |
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A major problem in selecting a sample is trying to recruit a group of people who are of the larger population. |
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Like other scientists, child psychologists use the in their research. |
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A is a group of individuals who are representative of a larger . |
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In a sampling approach called a , researchers select a very large, nationally representative group of people. |
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A is information a person provides about him- or herself, typically by answering a set of questions devised by a researcher. |
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There is often no substitute for the researchers' own of people. |
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The is a numerical measure of how closely two factors are related to each other. |
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In a formal experiment, the is exposed to the treatment, that is, the dependent variable. |
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In a , researchers measure the results of events that occur naturally in the real world. |
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2002 McGraw-Hill Higher Education