Several methods can be used for random assignment, including:
Simple Randomization: Each participant is assigned to a group purely by chance, such as flipping a coin or using a random number generator. Stratified Randomization: Participants are first divided into subgroups or strata based on certain characteristics (e.g., age, gender) and then randomly assigned within each stratum. Block Randomization: Participants are divided into blocks, and within each block, they are randomly assigned to groups. This method helps ensure equal group sizes.