Partial reinforcement is a concept in psychology where a behavior is reinforced only some of the time, rather than every time it occurs. This method can lead to stronger and more persistent behavior because the individual does not know when the reinforcement will come. It contrasts with continuous reinforcement, where a behavior is rewarded every time it occurs. This technique is often used in various settings, such as in training animals or in behavior modification programs. The unpredictability of rewards can make the behavior more resistant to extinction, meaning the individual is likely to continue the behavior even when reinforcement is not provided.