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5 Cards in this Set
- Front
- Back
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History
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specific events that are eternal to the experiment but occur at the same time as the experiment and may affect dependent variable
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extraneous variables
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threats to validity
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maturation
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changes in test units themselves that occur within the passage of time during the experiment
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testing effects
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caused by process of experimentation
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main testing effect
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prior observation affects a latter observation (directly)
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