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14 Cards in this Set
- Front
- Back
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Experimental units
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the individuals on which the experiment is done
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subjects
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when the experimental units are people
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treatment
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a specefic experimental condition applied to experimental units
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placebo effect
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a dummy treatment
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control, randomization, replication
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basic principals of experimental design
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control
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the effects of lurking variables on the response, most simply by comparing two or more treatments
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randomization
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use impersonal chance to assign experimental units to treatment
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replication
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each treatment on many units to reduce chance variation in the results
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statistical significance
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an observed effect so large that it would rarely occur by chance
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complete randomization
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when all ecperimental units are allocated at random among all treatments
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double blind experiment
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neither the subjects themselves nor the medical personel who worked with them knew which treatment any subject received
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lack of realism
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the subjects or treatments or setting of an experiment may not realistically duplicate conditions we want to study
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block design
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the random assignment or units to treatments is carried out seperatelly within each block
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matched pairs design
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common form of blocking for comparing just two treatments
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