Final answer:
A reinforcer that gains value through association with other valued items is a conditioned reinforcer, often called a secondary reinforcer in psychological terms.
Step-by-step explanation:
A reinforcer that gains value from being associated with other things that are valued is called a conditioned reinforcer. A secondary reinforcer, such as money or stickers on a behavior chart, has no inherent value and requires linkage to a primary reinforcer (like food, water, or shelter) to have reinforcing qualities.
In operant conditioning, the association between a behavior and its consequence can transform neutral stimuli into conditioned reinforcers through a learning process.