Final answer:
Percentage as a measure imposes arbitrary and fixed limits on behavior change data, as the range is confined between 0 and 100 percent, representing the upper and lower bounds respectively. These limits are fixed because they do not change, and arbitrary because they are selected by convention rather than by any property inherent to the behavior itself.
Step-by-step explanation:
Another limitation of percentage as a measure of behavior change is that arbitrary and fixed limits are imposed on the data. The correct answer here is b. Arbitrary; fixed. This is because percentages can only exist between 0 and 100, creating inherent upper and lower bounds for the data being represented. Anything below 0% becomes nonsensical as it would imply a negative occurrence of a behavior, and anything above 100% is impossible as it would suggest that the behavior occurred more than every possible opportunity.
For instance, if a student answered every question correctly on a test, their score would be 100 percent; it cannot logically exceed this upper limit. Likewise, a score cannot drop below the lower limit of 0 percent, as that would mean negative correct answers, which is not feasible. Therefore, the upper and lower limits of percentage constrain the data to a fixed and arbitrary range.