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Card 6

Front

Everyone in the entire target population has an equal chance of being selected

Back

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Card 7

Front

Using people from the target population who are available at the time.

Back

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Card 8

Front

Selects subjects in a logical way.

Back

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Card 9

Front

Participants volunteer themselves.

Back

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Card 10

Front

Divides target population into groups. There are people in sample from each group in same proportions as population.

Back

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Card 11

Front

Alternating the order at which participants perform in different conditions of an experiment.

Back

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Card 12

Front

Material for an experiment is presented in a random order.

Back

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Card 13

Front

Participants don't know which control/design they are in.

Back

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Card 14

Front

Neither the participants or researchers know what condition the participants are in.

Back

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Card 15

Front

Observations are made at regular time intervals and coded.

Back

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