Answer:
positive reinforcers
Explanation:
In psychology, there are four distinct types of reinforcement including positive, negative, extinction, and punishment and comes under the operant theory conditioning.
Positive reinforcers: In psychology, the term "positive reinforcers" is described as a phenomenon that encompasses the inclusion of a specific reinforcing stimulus that generally follows a behavior and therefore it makes sure that the given behavior will occur or happen in future again.
In the question above, the given statement signifies that good grades are positive reinforcers for Sasha's studying behavior.
