For example, you could reward your child for reading for 15 minutes each day or for completing a weekly assignment. This form ...

Contingent: depending on something else that might or might not happen; likely, but not certain to happen (e.g., plans to go to the beach are contingent on the weather) (From Merriam-Webster) Positive ...

Sometimes positive reinforcement occurs quite naturally. For example, when you hold the door ... they are not going to have the same effect on a high school or college student.