Answer:
Operationalization
Explanation:
When doing a study or research, the term operationalization of a variable refers to the process of defining variables in a very specific and precise way so they can be measure in an adequate manner once the study is done.
In this example, Professor Mathur defines friendship between children as sharing secrets and choosing to play with each other most of the time. If he describes this variable in precise detail he would be operationalizing it since he would be very specific and precise in order to measure it during his study.
