Reinforcement is provided by any factor that increases the probability that a response will be repeated. Which of the following can be factors of reinforcement?

Reinforcement can come from praise, a token award, or simply succeeding in a task, so all three qualify.

Praise (A) is a social reinforcer that raises the chance of a response recurring.

A token award (B) is a tangible secondary reinforcer, the basis of token economies.

Simply succeeding (C) is intrinsic reinforcement from the satisfaction of achievement.

Any consequence that increases the probability of a response is by definition a reinforcer.

B. F. Skinner's operant conditioning distinguishes positive and negative reinforcement, both strengthening behaviour.