A 4-year-old child has been on an oral antibiotic for 7 days. She still has the same symptoms as when she started taking the antibiotic. Her mother calls the pharmacy and speaks to a pharmacy technician. She tells him that though the antibiotic is supposed to continue for another 7 days, it's still almost three-quarters full. The pharmacy technician asks the mother how she's administering the medication. She explains that she's administering one spoonful three times per day. The technician asks what type of spoon she's using, because the prescription was for “one teaspoonful three times per day." The mother says the child will only allow her to use a plastic spoon that was inside the packaging of her favorite doll. What mistake has occurred in dosing?