What is an example of a secondary reinforcer?

A secondary reinforcer is a stimulus that gains its reinforcing properties through its association with primary reinforcers, which are inherently satisfying or necessary for survival, such as food, water, or comfort. Money, for example, does not satisfy a basic need directly but acquires its value because it can be exchanged for goods and services that fulfill those primary needs. In this context, completing chores and receiving money as a reward exemplifies how secondary reinforcers can motivate behavior by facilitating access to desired outcomes.

The other examples listed—such as a glass of water, a hug, or a warm blanket—are all primary reinforcers, as each provides immediate physical or emotional comfort without needing any prior learning. They are inherently satisfying and do not require any additional context to be considered rewarding.