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18 Cards in this Set
- Front
- Back
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population
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the whole group you want to study and describe
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sample
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the members within a group that you actually study
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random sample
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a sample in which every subject had and equal chance of being chosen
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theory
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an organized set of principles that describes, predicts, and explains some phenomenon
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hypothesis
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a specific testable prediction often derived from a theory
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observational/naturalistic studies
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A type of research in which the researcher can not influence or manipulate anything, occurs naturally in real world settings
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survey method
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a research method that involves interviewing or giving questionnaires to a large number of people
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case studies
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a type of research that involves making in-depth observations of individual persons
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correlation strengh
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this is indicated by how close the value is to + or - 1.
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correlation direction
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positive or negative relationship
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independent variable
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any variable that the researcher manipulates in an experiment, causes change
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dependant variable
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a variable that is being measured in an experiment, affected.
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control group
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not manipulated, serves as comparison for evaluating the effect of the treatment.
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experimental group
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the group that receives the manipulation in the experiment
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experimenter bias
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when researchers expectations influence outcome
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research participation bias
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participants are influence by how they think they should act
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double blind study
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both the research staff and the participants are ignorant about whether the research participants have received the treatment or a placebo.
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placebo effect
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any effect on behavior caused by the administration of an inert substance or condition, which is assumed to be an active agent.
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