Astudent is considering doing a complete repeated measures design experiment involving motor skills. the student's advisor has told him that people show a large initial improvement on the task followed by slow steady improvement after this initial change. the student must choose a technique for balancing practice effects. which technique should the student not use?
a. block randomization
b. latin square
c. abba counterbalancing
d. all possible orders
c. ABBA counterbalancing
The student should not use the method because it is a progressive error management technique for each subject by introducing all treatment circumstances twice, first in one sequence, then in the other (AB, BA) by subject counterbalancing.
If participants experience conditions more than once, they experience the conditions first in one order, then the opposite order.
C). ABBA counterbalancing.
As per the question, the technique which the student should not use to balance the practice effects would be 'ABBA counterbalancing' as it repeats the conditions and dispenses them evenly to balance/counter the effects which is not appropriate in this context(as it follows the stages of improvement and could not be distributed).
Except for this one, any of the other three could be employed to balance the practice effects as block randomization involves division of subjects into blocks that would make it easier and convenient while Latin square design offers a statistical method of counterbalancing and 'all possible orders' exemplify the inclusion of every possible sequence to the conditions. Thus, option C is the correct answer.