Final answer:
The phrase 'relating to normal function' means that something supports or leads to normal or regular operation. Using clear operational definitions in research ensures uniform interpretation and measurement.
Step-by-step explanation:
The meaning of "relating to normal function" refers to something that is conducive to regular operation. This would mean it supports, promotes, or leads to a state of operating as expected under normal conditions. A good analogy would be using the operational definition in research, where the description must lead to uniform interpretation and measurement across different researchers. For instance, defining "good drivers" as those who have never received a traffic violation is a more precise definition that allows for consistent and reliable measurement. In contrast, defining good drivers by behaviors such as signaling or courteousness could lead to varied interpretations and would not be an effective operational definition.