Which is NOT a type of tangible reinforcer?

Tangible reinforcers are physical items or rewards that can be touched or held, which typically serve to reinforce a specific behavior by providing a material benefit. Toys, money, and stickers fit this definition perfectly as they are concrete items that individuals can acquire and use.

Emotional support, on the other hand, is an abstract concept that involves providing comfort, empathy, or validation, but it does not manifest as a physical, tangible item. It represents an emotional or social form of reinforcement rather than a material reward, making it distinct from the others listed, which are all physical objects that can be provided as reinforcement for desired behaviors. This distinction clarifies why emotional support does not qualify as a type of tangible reinforcer.