Respuesta :
To ensure that potential differences among study participants are spread out across all experimental conditions, and to conduct sound experimental research, researchers need to use random assignment of participants.
To reduce selection bias, random assignment of participants is used.
With random assignment, participants have an equal chance of being assigned to an experimental or control group, resulting in a sample that is, in theory, representative of the population. Random assignment helps ensure comparable groups, minimizing the influence of individual characteristics.
For example, in a psychology experiment, participants might be assigned to either a control group or an experimental group. Some experiments might only have one experimental group while others may have several treatment variations. Using random assignment means that each participant has the same chance of being assigned to any of these groups.
Random assignment is the second necessary component of a randomized controlled trial, along with random selection. Once participants have been randomly selected from the population of interest, they should be randomly assigned to either receive the treatment (treatment group) or control treatment (control group).
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