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A psychologist wants to create two groups that are as similar as possible at the beginning of an experiment. The total number of participants is only 40. To do this, he or she should use Group of answer choices

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To create two groups that are as similar as possible at the beginning of an experiment, a psychologist must use a random assignment.

What is a random assignment?

It consists of procedures performed to ensure that each participant in a psychological experiment can participate in a study group at random, without bias, for example.

Therefore, random assignment makes the experiment more consistent and reliable by allowing differences between groups at the beginning of the research to not be systematic.

Find out more about random assignment here:

https://brainly.com/question/9423006

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