alleryStart learning →Giving every participant an equal chance of landing in either group is:
AOperational defining
BNaturalistic observation
CCorrelational research
DRandom assignment
Answer & Solution
Correct answer: D. Random assignment
1. Groups must start out comparable for a comparison to mean anything.
2. With random assignment, all participants have an equal chance of being assigned to either group.
3. That evens out unknown differences between the groups on average.
4. It is what makes a causal conclusion possible.
_Source: OpenStax Psychology 2e (CC BY 4.0), Ch 2 'Psychological Research', sections 2.1-2.4_
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