Drake has hypothesized that more freshman engage in "head scratching" than seniors. in order to test this hypothesis, he has to provide a specific description of the behavior which he would count as "one head scratching." would scratching the ear or the forehead be included? what if the student "scratched his head" against a book or door? would these also be counted in the study? this specific description of the behavior to be counted is called:

operational definition.

Explanation:

An operational definition is the description of the set of processes that must be performed to determine the absence or presence of each variable in an investigation. That is, it specifies what activities will be carried out to measure the variables being investigated.

In an investigation, it is imperative to make the operational definition as detailed as possible. You must include all the necessary variables to obtain reliable research results.

I hope this information can help you.

i truly dont know the answer wait i do its 1,3,4