Marjorie drives a school bus. sometimes the kids get rather noisy. she decides to play music the kids like through speakers on the bus, but whenever the kids get too noisy she turns the music off. when they quiet down, she turns the music back on. in this way, she hopes to get the kids to make less noise. marjorie is probably going to measure learning as a change in response

Marjorie is probably going to measure learning as a change in response "intensity".

We can likewise measure learning by noticing changes in the intensity of a behavior.

Measurement measures what we do, and genuine learning results in conduct change. Our measures aren't about numbers. Rather, we will likely comprehend what results we require.  

A measurable change just happens if students do something distinctively and you can quantify the conduct picked up from learning.

answer; i do believe its (b) 12.5 years of age;