Experimental Design Vocabulary

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Randomized block design

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A design where experimental units are grouped into blocks, and treatments are randomly assigned within each block.

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Matched pairs design

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A randomized block experiment where each block consists of a pair of similar experimental units.

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Undercoverage

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A situation where some members of the population cannot be chosen for the sample.

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Subjects in an experiment

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When the experimental units are human participants.

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Completely randomized design

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A design where treatments are assigned to all experimental units completely at random.

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Experimental unit

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The smallest division of experimental material such that any two units can receive different treatments.

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Treatment

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A specific condition applied to the individuals in an experiment.

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Control group

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A group in an experiment that does not receive the treatment and is used as a benchmark.

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Random assignment

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The process of assigning experimental units to treatments using randomization to eliminate bias.

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Replication

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The repetition of an experiment or treatment to ensure that results are consistent.