The best way to rule out selection bias is to have research participants select which group they will be in.

Name: The best way to rule out selection bias is to have research participants select which group they will be in.
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Allowing participants to select their group can introduce selection bias, as it may lead to non-random assignment and differences between groups that affect the study's outcome. Random assignment is the best way to minimize selection bias.

The Best Way to Rule Out Selection Bias Is to Have