HANDOUT 13.2


COUNTERBALANCING


COUNTERBALANCING WHEN THERE ARE ONLY

TWO LEVELS OF THE INDEPENDENT VARIABLE (A)

ORDER OF TREATMENT

 1ST 2ND
GROUP 1 A1 A2
GROUP 2 A2 A1

COUNTERBALANCING WHEN THERE ARE FOUR

LEVELS OF THE INDEPENDENT VARIABLE (A1-A4)


 1ST 2ND 3RD 4TH
GROUP 1 A1 A2 A4 A3
GROUP 2 A2 A3 A1 A4
GROUP 3 A3 A4 A2 A1
GROUP 4 A4 A1 A3 A2

COUNTERBALANCING WHEN THERE ARE THREE

LEVELS OF THE INDEPENDENT VARIABLE (A1-A4)


 1ST 2ND 3RD xxxxxxx
 xxxxxxx
 1ST 2ND 3RD
GROUP 1 A1 A2 A3 xxxxxxx
 GROUP 4 A3 A2 A1
GROUP 2 A2 A3 A1 xxxxxxx
 GROUP 5 A1 A3 A2
GROUP 3 A3 A1 A2 xxxxxxx
 GROUP 6 A2 A1 A3

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