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| A predisposition to a certain point of view despite the facts |
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| An in-depth study of a single person or group to reveal some universal principle |
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| Idea that cannot be seen or measured directly |
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| In an experiment, the group that does not receive the treatment |
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| The relationship between variables |
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| A method of research that looks at different age groups at the same time in order to understand changes that occur during the life span |
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| In an experiment, the factor that is being measured and that may change in response to manipulations of the independent variable |
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| An experiment in which neither the participant not the researcher knows whether the participant has received the treatment or the placebo |
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| Rules and standards for proper and responsible behavior |
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| In a study, the participants who receive the treatment |
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| A prediction or assumption about behavior that is tested through scientific research |
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| The factor that is manipulated by the researcher to determine its effect on another variable |
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| The study of behavior in a controlled situation |
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| A type of research in which the same people are studied over a long time period |
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| The study of behavior in naturally occurring situations without manipulation or control on the part of the observer |
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| The relationship between two variables in which one variable increases as the other variable decreases |
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| An inert substance used in controlled experiments to test the effectiveness of another substance |
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| A relationship between variables in which one variable increases as the other variable also increases |
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| A survey population selected by chance which fairly represents the general population |
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| To repeat a research study, usually with different participants and in different situations, to confirm the results of the original study |
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| A representative segment of a target population |
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| A study in which the participants are unaware of whether they are in the control group or the experimental group |
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| A measure of the distance of every score to the mean |
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| A sample drawn in such a way that known subgroups within a population are represented in proportion to their numbers in the general population |
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| A research technique for acquiring data about the attitudes or behaviors of a group of people, usually by asking questions of a representative, random sample |
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| The total group to be studied or described and from whom samples may be drawn |
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| factors that are measured in a scientific study |
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| The concept that people who volunteer to participate in research studies often differ from those who do not volunteer |
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