For divition of participants into 2 random groups of 28 members, first give each participant number 1 to 56. then we will devide them randomly(complete randomization excel file is available) :
block identifier, block size, sequence within block, treatment, code
• 1, 4, 1, Group B, OK1
• 1, 4, 2, Group A, NY0
• 1, 4, 3, Group A, CA8
• 1, 4, 4, Group B, UP6
• 2, 4, 1, Group B, LA0
• 2, 4, 2, Group A, VK2
• 2, 4, 3, Group B, AY0
• 2, 4, 4, Group A, LW6
• 3, 4, 1, Group A, CM7
• 3, 4, 2, Group B, BX0