To Better Study Depression, I Will Count How Long an Individual

Multiple Choice

To better study depression, I will count how long an individual walks with their head angled down towards the ground as well as the number of times the person talks when in a social setting. I am thinking that the more depressed a person is, the more they will walk with their head down and the less they will talk to others. What I have done in this study is _____ depression.

A) operationalize
B) statistically defined
C) created a parameter for
D) quantified