Monica gave William a nice tie for his help in locating a good used car. the tie is an example of a secondary reinforcer.
A secondary reinforcer is a stimulus that reinforces a behavior after the primary reinforcer has been associated with it. As an example: When you give your dog a food treat and praise him, he receives both the primary stimulus of the treat and the secondary reinforcer of verbal praise.
After a dog completes a task, he is rewarded with a clicker and food. Money, grades, and tokens earned for good behavior are examples of secondary reinforcers, as they lead to primary reinforcers necessary for the species' survival.
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