Counterbalancing

To avoid carryover effects vary the order of the tasks:

• Randomize order
• Sets of predefined orders – subject is randomly assigned to one of these sets

Transcript

Now, to avoid the carryover effect, we can use so-called counterbalancing techniques - by randomizing the order. You choose this person to be part of a group that does that task method one first. You choose the next person statistically to use the other method. We think about pre-defined orders and then randomly assigned people to those different groups, etc.