Use the figure to answer the question below.
In the figure, MPF reaches its highest concentration during this stage.
Definitions:
Premack Principle
A theory that more probable behaviors can reinforce less probable behaviors.
Primary Reinforcer
A stimulus that satisfies basic survival needs and is naturally reinforcing, such as food, water, or sleep.
Secondary Reinforcer
A stimulus that has become rewarding through its association with a primary reinforcer, which does not inherently satisfy a biological need.
Shaping
A method of training by which successive approximations towards a desired behavior are reinforced.
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