Indicated by its name, this is the simplest form of randomization that is based on a single sequence of random assignments (Kang et al., 2008). Methods such as flipping a coin or rolling a die determines the assignment of participants to the treatment or control groups. For example, if there are two groups, a control and a treatment group, researchers can flip a coin where “heads” assigns participants to the control and “tails” assigns participants to the treatment group ...