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9 Cards in this Set
- Front
- Back
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When conducting experimental research, the experimenter is often aiming to determine if there is a ________ between the IV and the DV and, if so, whether there is ________.
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relationship
causality |
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Three factors that can cause variability in a study are ________, ________, and ________.
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the IV, or experimental variance
systematic error, or error due to extraneous variables random error, or error due to random fluctuations |
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The main method of maximimizing the experimental variance is ________.
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make sure subjects receive adequate exposure to the IV.
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There are several ways to control for systematic (extraneous) error. The most powerful way to do this is ________ because this method ________.
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randomization
equalizes all known and unknown variables across groups. |
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A limitation to ________, or selecting subjects who are homogenous on a variable, as a method for controling systematic error is ________.
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holding the extraneous variable constant
it limits the generalizability of the results. |
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A method of controling for systematic error in which subjects are paired in terms of their status on the extraneous variable, and then the pairs are split and randomly assigned to different groups.
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Matching
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Grouping subjects by an extraneous variable you want to control, and then randomly assigning subjects in each group to one of the treatment levels, is called ________.
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Blocking
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A method of controlling the effects of a cofounding variable using ANCOVA or other technique is called ________.
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Statistical control
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Methods to minimize random error in a study include ________, ________, and ________.
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preventing subjects from becoming fatigued
reducing environmental distractions ensuring that measuring devices are reliable |
