Term
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Definition
| group of subjects to whom the experimental stimulus is administered |
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Term
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Definition
| group of subjects who don't recieve stimulus, but are otherwise similar to the experimental group |
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Term
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Definition
| neither the subjects nor the experimenter know which is experimental and which is control |
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Term
| How can we ensure the similiarity between experimental and control groups? |
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Definition
| randomization (random sampling), matching (quota sampling) |
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Term
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Definition
| single group of subjects is measured on a variable following an experimental stimulus |
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Term
| One-group pretest-posttest |
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Definition
| adds a pre test for the group, but lacks a control group |
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Term
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Definition
| has a control group and experimental group, no pretest |
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Term
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Definition
| when correlation is shown between the two variables, occurs when the conclusion drawn from an experiment matches what went on in the experiment |
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Term
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Definition
| occurs when control and experimental group are initially dissimilar, differences between groups |
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Term
| history's threat to internal validity |
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Definition
| effect of historical events |
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Term
| Testing on internal validity |
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Definition
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Term
| Instrumentation on internal validity |
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Definition
| validity of measurements (use the SAME for pre and post test) |
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Term
| Statistical Regression on IV |
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Definition
| an "extreme group" will tend to regress towards the mean |
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Term
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Definition
| subjects tend to drop out |
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Term
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Definition
| occurs when the experimental conclusiions are not generalizable to the real world. |
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