When the reinforcer increases, performance also increases, this is called the crespi effect. As the reinforcement continues to increase, the performance or frequency of the behavior continues to increase. The same is true in reverse. As reinforcement decreases, performance decreases.
It originated in 1942 by the American psychologist Leo Crespi. He put rats in a maze and gave them various tasks and rewards associated with these tasks. He noticed that as the size of the rewards increased, the mice worked faster, and as they decreased, they worked slower. He understood the effect of the size of the reward on performance and called it the Crespi effect.
Crespi Effect Examples
Crespi Effect Example 1: If you give a child chocolate to study, he will study more if you give him more chocolate, or if he was not studying before you gave him chocolate, he will start studying after you give him chocolate.
Crespi Effect Example 2: When training a dog to sit, if you give it a treat or meat instead of saying “well done” when it sits, it will start to sit more. As you start to increase the amount, it will start to sit more and more and will easily get the training.
Crespi Effect Example 3: Imagine that before a match, a premium will be given to the players of the team that is expected to win the match. As this premium increases, the desire of the players to win the match will increase. If the premium increases even more, their desire to win the match will increase even more.
Crespi Effect Example 4: If you want employees to perform better, give them a pay raise and you will see that they work harder and more willingly. If you give them a little more on top of that, they will try even harder.
Crespi Effect Example 5: A person going on stage at a concert will perform very well if he gets more applause and positive reactions than he expects. If he gets more applause when he moves on to other songs, his performance will be much better.
The opposite of these examples and explanations can also happen. So think negatively. As the rewards decrease, the desire will decrease. The direction doesn’t matter. It is an effect that moves according to the reinforcer.