What is the antidote to the carryover effect?
a. Random assignment
b. Counterbalancing
c. Sequencing
d. Bias control
ANS: B
Sometimes the application of one treatment can influence the response to later treatments, a phenomenon referred to as a carryover effect. If a carryover effect is known to occur, it is not advisable for a researcher to use this design strategy for the study. However, even when no carryover effect is known, the researcher may take precautions against the possibility that this effect will influence outcomes. In one such precaution, known as counterbalancing, the various treatments are administered in random order rather than being provided consistently in the same sequence.
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