Using the block randomization method by the statistical consultant, the following randomization is done in 3 groups of Cognitive Rehabilitation Therapy, Mindfulness-Based Stress Reduction Therapy, and control: First, the list of names of qualified people is provided and coded. In block randomization, the number of participants in all groups will be very close, this is done by building blocks of sequences and intersections so that the same number of participants are allocated to study groups within each group. First, we encode the groups based on the Latin letters as follows:
A =Cognitive Rehabilitation Therapy, B = Mindfulness-Based Stress Reduction Therapy, and C control group
In this study, with three groups A, B, and C, we create the following six groups and assign the numbers 1 to 6 to each:
ABC-ACB-BAC-BCA-CAB-CBA
Then, using the table of random numbers, we contract that if the numbers 1, 2, 3, 4, 5, 6, and 6 appear in order, one of these blocks will be selected, and if another number appears, we will assume it to be null and void and move on to the next selection. In fact, we have obtained a random sequence of numbers with a table of random numbers, which we consider the order of the assigned allocation for each number. In this way, the number of people in the groups will be almost equal.