Zoe has always wondered if the saying "absence makes the heart grow fonder" is true. so she decides to conduct a research to find out whether the saying is empirically valid. zoe is trying to define "absence" in such a way that it specifies how it is to be observed and measured. she is attempting to find an appropriate: question 1 options:
O framework.
O corollary.
O theoretical definition.
O operational definition.