Answer:
Ratio Scale
Explanation:
Based on the scenario being described within the question it can be said that the type of quantitative variable being used is known as a Ratio Scale. This type of variable measurement scale is used by researchers in order to compare the intervals of a behavior in order to create a scale for that behavior. Which is what the researcher in this scenario is doing by calculating the number of times the child used aggression in order to quantify the aggressiveness (make a scale.)