Answer:
the covariation principle
Step-by-step explanation:
Covariance states that when two different factors share a relationship with each other and if one changes, then the other factor should change as well, either negative or positive.
The same is happening with Hector's behavior. If he wins, he plays with kids (one factor), if he loses, he quits playing and watches television (the other factor).
The covariation principle: The Principle explains how we attribute a person's conduct or behavior to either the external causes (the situation) or the internal causes (their disposition).